Machine Design and Shop Practice (MDSP) Inhouse Practice Exam

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• Which of the following is the ratio of the fatigue strength without a stress concentration to the fatigue stress with a stress concentration?
• Which wires experience maximum stress when a wire rope passes around a sheave or drum?
• During gear hobbing, which motion is synchronized with the hob's rotation to create the correct tooth profile?
• The accurate method of finding the natural frequency of transverse vibrations of a system of several loads attached to some shaft is
• Which pairing of gases is commonly used as shielding gas in tungsten arc welding?
• After thousands of operating cycles, torque calculations for a plate clutch are normally based on the uniform wear assumption because:
• Backlash in spur gears is the difference between which two features measured on the pitch circle?
• Clutch and coupling perform the same action.
• What is the primary effect of stress concentration in a machine member?
• Which type of gear is used when shaft axes are offset from each other?
• Which ASTM code designates Chrome Vanadium?
• In the Lewis equation, a gear tooth is considered as which type of beam?
• The loading pattern that starts at zero, rises to a maximum, then returns to zero is best described as
• Eye bolts are used for
• To obviate axial thrust, which gear arrangement is used?
• Which type of gears are used for shaft axes having an offset?
• Which key is generally NOT recommended for transmitting heavy torque because no keyway is cut into the shaft?
• Which hardness test is based on measuring the depth of indentation to determine hardness?
• A passenger vehicle braking system in which a rotor is squeezed from both sides by friction linings mounted in a housing is known as which brake type?
• In bolt design, the quotient of the proof load and the tensile-stress area is called
• If both sprockets of a chain drive are replaced with sprockets having twice as many teeth while maintaining the same pitch and speed ratio, the chain velocity will
• Which physical phenomenon allows both friction clutches and friction brakes to transmit or absorb torque?
• Which mineral corresponds to a Mohs hardness of about 2?
• If two intersecting shafts transmit rotary motion and the angle between them varies during operation, which coupling is appropriate?
• When the velocity ratio is high and space is limited, which gear should be used?
• A thin plate with a circular hole is heated uniformly. If the coefficient of linear expansion governs the material, the hole area will:
• What is the axially located rectangular groove in a hub and shaft called?
• The normal to the involute is tangent to which circle?
• A member is subjected to a loading cycle where the stress varies from zero to a maximum tensile value before returning to zero. This loading is classified as:
• Who postulated the maximum distortion energy theory?
• What is the other name for Kennedy key?
• Which method is widely recognized for reducing alternating stress in bolted tension connections?
• The lead screw of a precision lathe typically uses a thread form that provides good efficiency while handling axial loads. Which form is this?
• Holding power of a sunk key is due to resistance, which it offers in
• Which of the following types of gear is free from interference?
• These clutches produce positive coupling between the two shafts, regardless of direction of rotation.
• Which follower motion type will produce the least jerk to the system?
• Which type of key is Kennedy key another name for?
• The sum of addendum and dedendum equals the whole depth.
• Which ASTM code designates Chrome Silicon?
• Electrical conductor grade aluminum consists of approximately what percent of aluminum?
• Which hand tool is commonly used for cutting or twisting wire and chipping small parts, and is not used for tightening or loosening bolts and nuts?
• Fatigue failure most commonly results from:
• Constantan is an alloy of copper and nickel.
• In designing a shaft, hub and key for a system, weakest member taken is
• The primary purpose of lockout/tagout before servicing equipment is to prevent accidental energization.
• An axle is a machine part that is subjected to
• In a single slider four-bar linkage when the slider is fixed, it forms a mechanism of
• Which condition describes a surface that is comparatively free of stress?
• Which property of a clutch friction material is most important for reliable engagement under load?
• The thickness of a gear tooth is measured
• The curves that satisfy the fundamental law of gearing are:
• Flux is used in soldering to:
• Tubular gears are the gears used in which device to reverse rotation?
• An engineer selects ASTM A401 for manufacturing a heavy-duty valve spring. What spring material does this ASTM code represent?
• A flange coupling is transmitting torque through fitted bolts. Which assumption is generally adopted in its design?
• When the helical compression spring is subjected to axial compressive force, the type of stress induced in the spring wire is
• Two shafts, solid and hollow, same material and weight having same length subjected to equal torsional force. What is the torsional stiffness of hollow shaft?
• Plasticizers added to plastics primarily increase which property?
• Which alloy contains 40% to 60% copper with the remainder nickel and is used in thermocouples?
• Which gear type is typically used to reduce noise in transmissions?
• A key that transmits power through frictional resistance only is
• A tool bit for cutting an American National thread should be ground with an angle of:
• Which alloy is known for low creep rate, is age-hardenable, non-magnetic, oxidation resistant, and maintains high strength at elevated temperatures?
• Automobile steering gear is an example of
• Backlash is the difference between which features? (measured on the pitch circle)
• A thin film bearing is a bearing
• In a four-bar mechanism, the center of gravity of the coupler link experiences what accelerations during motion?
• Which alloy is available in five slightly different nominal composition for applications that require high strength, good fabricating and fusing qualities, immunity to rust, free machining and a corrosion resistance equivalent to copper?
• When a specimen of low-carbon steel is loaded past its elastic range, what behavior is expected after the load is removed?
• Why are plain washers commonly installed beneath the head of a bolt or nut?
• Wahl factor must be considered to account for
• For sunk key, where is the keyway located?
• If two shafts are neither parallel nor intersecting, power can be transmitted by using spiral gears.
• Which term describes a material whose properties are identical in all directions?
• Which key is generally preferred when ease of manufacturing is the primary consideration for a rigid shaft-hub connection?
• Beach marks on a fracture surface are characteristic of which type of failure?
• A supplier mistakenly ships ASTM A229 spring wire instead of the specified material. Which material was delivered?
• In damped free vibration, what happens to the amplitude over time?
• When two bevel gears having equal teeth and equal pitch angle are used to transmit power between shafts that intersect at right angle, they are called
• Which of the following is the most effective design change to reduce fatigue failure due to stress concentration?
• Which type of vibration is associated with a gradual reduction in amplitude due to frictional or resistive forces?
• The addendum circle passes through the tips of the gear teeth.
• Which coupling is commonly selected when the shafts are collinear, permanently aligned, and ease of manufacturing is more important than ease of dismantling?
• Which sunk key made the form of a segment of a circular disc of uniform thickness, known as?
• In roller chain lubrication, which method uses a circulating pump to supply a continuous flow of oil inside the chain loop across the width and directly at the slack strand?
• Which brake shoe develops a self-energizing action because the friction force tends to draw the shoe more tightly into the rotating drum?
• PV rating is a design criterion for sleeve bearings; what two factors does PV represent?
• What factor quantifies the stress amplification at a geometric discontinuity?
• Which statement correctly describes 18/8 stainless steel composition?
• Spur gears used in machine tool gearboxes must have a contact ratio greater than 1.4.
• Which designation corresponds to Music Wire?
• Which line convention is used to represent features that cannot be seen directly in the current viewing direction?
• In GTAW, shielding gas is typically argon or helium.
• In flange coupling design, which element becomes critical if bolts are upgraded to significantly higher strength?
• For transmitting power, a simple gear train consisting of 11 gears is used. Then the driver and driven shafts will be rotating in
• Which coupling uses rubber bushes to allow angular and axial displacement?
• In automobiles, the gear box is placed between which two components?
• For a planar four-bar linkage, the sum of the shortest and longest lengths cannot be greater than the sum of the remaining two link lengths if there is to be a continuous relative rotation between two members." How do you call the preceding statement?
• Under normal service conditions, a screw fastener is designed to carry which type of loading?
• For a cone clutch, what is the commonly used angle between the friction lining and the axis?
• In column stability analysis, which factor has the most significant influence on the shape assumed by a column when it buckles under compressive loading?
• What is the direction of the Coriolis component of acceleration in a slotted lever-crank mechanism?
• An imaginary circle passing through the points at which the teeth of the meshing gears contact each other.
• What's no. 5 in Mohs Hardness Scale?
• In screw thread terminology, what is meant by the pitch of a thread?
• Kevlar epoxy composite is widely used in which sector?
• In a concrete mixer, the bevel gears for rotating the drum are generally made by
• A shaft drawing contains the notation R6 at the corner between two surfaces. This indicates
• Which statement best describes a riveted joint?
• Which motion conversion is used by a lawn-sprinkler which is a four-bar mechanism?
• Which ASTM specification corresponds to Chrome Vanadium Spring steel commonly used in fatigue-resistant applications?
• Which coupling should be selected when two intersecting shafts must transmit rotary motion while the angle between them varies during operation?
• In a four-bar chain, how many turning pairs are present?
• Effective stress in wire ropes during normal working is equal to the stress due to
• Which clutch type transmits power through positive engagement of interlocking members rather than relying on friction?
• Wire rope is typically used in applications with which combination of speed and tension?
• A single crystal grown by vapor deposition is commonly referred to as what?
• Which device is used for transmitting energy in CNC machine tools?
• Which coupling is best for easy dismantling when shafts are perfectly aligned?
• A packaging conveyor originally driven by V-belts will now operate in an environment continuously exposed to oil contamination. Which power transmission system is preferred?
• A surface texture symbol is modified by adding a small circle to the basic symbol. What does this indicate?
• On the motors with low starting torque, the type of the clutch to be used is
• Which mechanism is an inversion of the double slider-crank chain?
• A tapered key which fits in a key-way in the hub and is flat on the shaft, is known as?
• In zerol gears, the axes of the shafts are described as which of the following?
• The gear tooth Vernier is used to measure which of the following?
• Which alloy is known for free machining and corrosion resistance equivalent to copper?
• In cold-riveted joints, the allowable joint strength is most often governed by which stress?
• Straddle milling is an operation that machines which of the following?
• According to Hooke's Law, within the proportional limit, which statement best describes the relationship between stress and strain?
• A mechanic receives a bearing designated 6312. Which feature is identified by the digit '3' in the bearing designation?
• Which manufacturing method is used for high-volume, net-shaped gear production?
• In the designation Ø40 H7/g6, which aspect does the 'H7' represent?
• Which welding process is described as welding by local fusion with or without filler and was developed later, used in WWI ships?
• Path of contact in involute gears is which of the following?
• Degrees of polymerization for commercial plastics are usually less than which of the following values?
• The base helix angle is the angle the tooth makes with the gear axis at the base cylinder. This term is called?
• Autofrettage is a method of
• In a four-bar mechanism, the center of gravity of the coupler link would experience which type of acceleration?
• Mechanical impact devices that accept material smaller than approximately 4 inches.
• Most of the non-recycled aluminum produced today is produced electrochemically. What do you call this process?
• If a bushing gear has no backlash, which of the following is a likely consequence?
• In a kinematic chain, a quaternary joint is equivalent to how many binary joints?
• In a multiple V-belt drive under identical loading, if one belt fails first, what is the most probable cause?
• Borax is applied to parts to be brazed in order to:
• Gears are considered to be medium velocity type if their peripheral velocity lies in which range?
• What is the primary purpose of performing a ring test on a vitrified grinding wheel before installation?
• Which operation is used to enlarge a drilled hole to the exact size and improve its finish, without significantly altering the hole location?
• For evenly distributed and uniform wear on each meshing gear tooth, the ideal design practice is to consider a:
• Two bevel gears with equal teeth and equal pitch angle used to transmit power between shafts that intersect at right angle are called
• Which statement is correct about the use of multiple threads in power screws?
• Which key is commonly used on machine tool spindles because it permits axial movement of the hub without interrupting power transmission?
• In sulfuric acid, which alloy is suitable for handling acid in concentrations up to 50% and at boiling point?
• In metalworking, which workshop is dedicated to fabricating mechanical units by cutting and assembling metal parts?
• Which type of gear will be used to have minimum axial thrust?
• Which power transmission method is most suitable in an environment with oil contamination?
• During fatigue analysis, which quantity expresses the relationship between the alternating stress and the mean stress?
• If both the maximum and minimum stresses remain tensile throughout a loading cycle but are of different magnitudes, the stress condition is known as:
• Which element is an austenitic stabilizer?
• Which statement correctly distinguishes clutch from coupling?
• Lowering the pressure angle on gears affects tooth strength in which way?
• In a cold riveting joint, which stress is most often the controlling factor for joint strength?
• Which mechanism produces intermittent rotary motion from continuous rotary motion?
• In welding, weld spelter means:
• Which nut type is designed to be hand-tightened due to its knurled exterior?
• Which alloy is best known for resistance to sulfuric acid in concentrated solutions at elevated temperatures?
• Why are plasticizers added to plastics?
• The gear box in automobiles is placed between which components?
• In flange coupling, torque is carried by bolts via which mechanism?
• For hydrodynamic lubrication
• Which type of coupling is most appropriate for connecting two shafts having a small amount of parallel and angular misalignment while transmitting moderate torque?
• Which of the following is an effective method of reducing the alternating stress in bolted tension connections?
• Reverted gear train is the gear train in which the first and last gear are on the same axis. Which option correctly describes this?
• What does a double-start thread imply about the lead compared with the pitch?
• The train value of gear train is _____________.
• Which line type is used to extend dimensions on a drawing beyond the object?
• Which of the following is the major alloying element of Invar?
• Which drilling machine is specifically intended for machining large, heavy workpieces that cannot be conveniently repositioned during drilling?
• The design calculations for members subject to fluctuating loads with the same factor of safety yield the most conservative estimates when using
• In zerol gears, the axes of shafts are
• For machinery shafts, the permissible deflection is approximately what value?
• Which of the following type of fastener has a trilobe thread structure?
• The overload condition that occurs near large concentrated loads is called which phenomenon?
• Non-metallic gears have which combination of noise and load carrying capacity?
• Which type of pliers is designed for cutting wires and holding flat round stock?
• Forging possesses the following disadvantage:
• It is a device that opposes motion and dissipates energy. An example of which is automobile shock absorber.
• In a kinematic chain, replacing a quaternary joint with an equivalent arrangement involves how many binary joints?
• Which mechanism represents an inversion of a single slider-crank chain?
• An offset in radial cam translating follower mechanism serves to decrease pressure angle during ascent. Which option expresses this correctly?
• Which screw thread is used for transmitting force in one direction?
• A feather key is usually
• Which property is most directly related to the surface endurance limit of a gear material?
• Davis steering gear consists of which type of pairs?
• Which of the following is recovered by the simple process of heating highly crushed ore?
• Which nickel alloy designation corresponds to an age-hardenable wrought nickel alloy described in the material?
• Which machine tool uses a single-point cutting tool in a reciprocating motion to produce flat surfaces?
• Under axial load, each section of a close-coiled helical spring is subjected to
• The gear train in which the first and last gear are on the same axis is known as which type?
• The maximum-strain theory which applies only in the elastic range of stresses is also known as which theory?
• In assembly practice, which joint type is generally not intended to be disassembled without damaging the components?
• A four-bar chain consists of four rigid links connected by joints that are all turning pairs.
• During an over-speed condition, which component of a cast-iron flywheel is most prone to failure first?
• Which line type is used to denote features not visible in the current view?
• The friction material of the clutch should have
• In a beam of circular cross-section, the maximum shear stress relative to the average is how much higher?
• The section of a beam that is most critical for design purposes and lies near the location where the bending moment attains its greatest value is referred to as the
• Reducing the pressure angle on gears results in which of the following?
• Which statement about involute gears is false?
• Which key is generally NOT recommended for transmitting heavy torque because no keyway is cut into the shaft?
• A machinist receives a drawing specifying Ø40 H7/g6. This designation primarily defines the
• Rolling without slipping describes the contact condition between a belt and pulley in a belt drive. Which of the following best expresses this?
• In a thick cylinder pressurized from inside, the hoop stress is maximum at
• Which one of the following is a positive clutch?
• A bolt connecting a vibrating machine base fractured at the thread root after several months of service. Beach marks on the fracture surface indicate which failure mechanism?
• From design point of view, spherical pressure vessels are preferred over cylindrical pressure vessels because
• Which of the following is not a correct procedure to increase the fatigue limit?
• During the inspection of a roller chain, which dimension is commonly checked to determine whether excessive wear has occurred?
• A shaft revolving in a bearing is an example of which type of kinematic pair?
• For motors with low starting torque, which clutch type should be used?
• At the instant a vibrating body passes through its equilibrium position, which statement about energy is correct?
• In a drawing, the notation R6 at the corner between two surfaces indicates what?
• Tube mills are also known as agitator ball mills and are commonly used for wet grinding. Which mill type fits this description?
• For an element subjected to pure shear stress, the normal stresses on planes oriented at 45 degrees to the original shear planes are:
• Which key is formed as a circular disc segment of uniform thickness?
• Which of the following keys is preferred for transmitting a large amount of impact-type torque in both directions?
• In steels that have been deoxidized with aluminum, no grain growth occurs until the ________ is reached, which is well above the critical temperature.
• A cast-iron flywheel has reached its maximum allowable rim speed. If the rotational speed is increased further without changing its diameter, which failure is MOST likely to occur first?
• In gear hobbing, which motion is synchronized with the rotation of the hob to generate the correct tooth profile?
• In a shaft, a key capable of tilting in a recess milled out in a shaft is known as?
• To keep maximum shear stress the same when shaft speed is doubled while transmitting the same power, the new diameter should be
• Constantan is composed primarily of copper and nickel.
• Which process is used to refine bauxite to alumina in aluminum production?
• Which type of pliers is used for cutting wires and holding flat round stock?
• Stress concentration in a machine component of ductile materials not so harmful as it is in brittle material because
• If both sprockets have twice as many teeth while maintaining the same pitch and speed ratio, the chain velocity will
• Before modern non-asbestos materials became common, asbestos was widely selected for brake linings primarily because it possessed:
• Which range is a typical speed for fabric belts?
• Gear used to transmit power at high velocity ratios between non-intersecting shafts that are usually but not necessarily at right angle.
• Thread stripping in a nut is most likely when:
• Stress concentration in cyclic loading is more serious in which type of material?
• The property where mechanical properties are the same in a particular direction at every point is known as
• Which polymer is formed from chloroprene of the monovinyl acetylene type?
• If some links are connected such that motion between them can take place in more than one direction, this motion is called
• The designer intends a fit that guarantees running clearance under all manufacturing conditions. Which fit type should be specified?
• Spelter refers to which metal when used as brazing filler metal?
• When evaluating torque capacity of friction clutches that have been in service for an extended period, which design assumption is typically used?
• Which of the following consists of a number of parallel strands of fiber, the strands are side by side (not interwoven or twisted together), forming a flat ribbon?
• Saint-Venant's Theory is the name given to which theory?
• The wires in a wire rope are subjected to which stresses?
• Degrees of polymerization for commercial plastics are usually less than:
• The tensile stress produced in the rim of a flywheel due solely to centrifugal force is directly proportional to which quantity?
• Which statement best describes the electrical and thermal conductivity of plastics?
• Tubular gears are the gears used in which device to reverse rotation?
• What is the mobility of a statically indeterminate structure?
• Which cast iron consists of carbon in rosette form?
• When the hole is smaller than the shaft, the allowance is said to be negative and is termed.
• What does CGI stand for in cast iron materials?
• Operating a flywheel in a vacuum chamber primarily reduces windage losses.
• In engineering drawings, which line is used to indicate the center of symmetry and proper alignment for features?
• Which factor is defined as the ratio of the maximum stress at a discontinuity to the calculated nominal stress?
• In most of internal combustion engines, crankshaft bearings is
• One of the three basic filing methods performed by grasping the file at the end and drawing across the workpiece is called what?
• Which engineering material is most capable of sustaining large plastic deformation before fracture?
• Which form of copper is recovered by heating highly crushed ore?
• Addition of vanadium to steel improves which property?
• The example of a lower pair is
• The shape of cantilever for uniformly distributed load will be:
• Which of the following is NOT considered a governing failure mode in establishing the horsepower rating of a standard roller chain?
• Rectangular bar in a rectangular hole is an example of which type of kinematic pair?
• In a gear train, the train value is the reciprocal of the speed ratio.
• Which material does ASTM A229 correspond to?
• Which property primarily determines the energy storage capacity of a flywheel under varying load?
• The bearing characteristic number in a hydrodynamic bearing depends upon
• A flat-faced follower operates against a cam whose profile is an eccentric circle. As the eccentricity increases, what happens to the follower displacement?
• In an involute gear, the normal to the involute is tangent to which circle?
• Which method is based on energy conservation to estimate fundamental frequency?
• Which statement about pitch circle diameter of an involute gear is true?
• Which design modification reduces the stress concentration factor?
• Before starting the brazing process, cleaning of parts is necessary to avoid which of the following?
• Which type of gears is used for noiseless operation?
• A tapered key which fits in a key-way in the hub and is flat on the shaft is known as?
• A flange coupling is designed assuming that the key, bolts, and shaft all have equal factors of safety. If the bolts are upgraded to a material with significantly higher shear strength while all other dimensions remain unchanged, which component becomes the critical element?
• Rayleigh's method of computing the fundamental natural frequency is based on
• A key capable of tilting in a recess milled out in a shaft is known as?
• Which set of accelerations is involved in the motion of the piston inside the cylinder of a uniformly rotating cylinder mechanism?
• What is the PRIMARY purpose of lockout/tagout before servicing a machine?
• Which factor primarily determines the suitability of a plain washer under a bolt head?
• Which alloy is best described as a nickel-based superalloy designed for high-temperature strength in aerospace applications?
• Which element is a ferritic stabilizer?
• The whole depth for a pair of gears is given by
• In the buckling design of a screw jack, end conditions are typically assumed as which of the following?
• A milling operation that machines two opposite sides of a workpiece at the same time is called?
• Under the ANSI system of orthographic projection, the right-side view is located relative to the front view where?
• Which type of nut is designed to be tightened by hand without a wrench?
• In a double-riveted lap joint under eccentric loading, outer rivets are generally more highly stressed because they
• In arc welding, the temperature of the arc is:
• Which shape of steel key is usually strongest in shear and crushing?
• For a flat-faced follower against a cam, increasing eccentricity primarily affects the follower's
• Nodular cast iron contains graphite in what form?
• ________ is also known as tube mills and are commonly used for wet grinding.
• Which mechanism is an inversion of the double slider-crank chain?
• The maximum strain energy that can be stored in a body is known as
• Compared with spur gears, helical gears tend to run:
• In order to prevent the brake arm from grabbing, the moment of friction force about the brake arm pivot should be
• A sleeve bearing is required to operate without continuous lubrication in a light-duty conveyor. Which design parameter should be checked FIRST before approving this application?
• Which screw thread is adaptable to split type nut?
• A bearing is designated by the number 410. It means that it is a bearing of which type?
• Which form of fiber is composed of a number of parallel strands side by side, forming a flat ribbon?
• For the same transmitted torque and bolt diameter, increasing the bolt pitch-circle diameter of a flange coupling will:
• A centrifugal clutch's engagement speed is affected by spring stiffness. What is the effect when stiffness increases?
• Which design modification most effectively increases the energy storage capacity of a flywheel without increasing its rotational speed?
• Increasing the stiffness of springs in a centrifugal clutch affects engagement speed how?
• In first-angle projection, the top view is placed
• The commonly used angle between leather or asbestos friction lining surface and axis of cone clutch for a cone clutch is
• What is a unique form of cast iron with worm shaped graphite particles?
• Which gear type is described as interference-free?
• Plastics are:
• The main function of an automobile gearbox is
• Concentric springs are used to achieve greater load carrying capacity with given space, provide fail-safe operation, and eliminate surge.
• Surface endurance limit of gear material is dependent on its Brinell hardness number.
• In an oil-lubricated journal bearing, coefficient of friction between the journal and the bearing
• Which welding process uses a non-consumable tungsten electrode with inert gas shielding?
• Constantan is used in thermocouples due to its high electrical resistance.
• The term 'proof resilience' refers to the maximum strain energy that can be stored in a body before yielding.
• A workshop where metal parts are cut to size and assembled into machines is called what?
• Spelter is another name for which of the following?
• How are gears for watches generally manufactured?
• In a belt drive where belts share load unevenly, what is the most likely consequence?
• If the effective driving tension remains constant while the belt velocity is doubled, the power transmitted becomes?
• Which heat-treatment medium is typically used for AISI O-series tool steels?
• Which gear is used to transmit motion with high smoothness and reduced vibration?
• In ductile materials notch or stress raiser is less harmful because
• Which mechanism is typically used to connect two shafts with misalignment, known as Oldham's coupling?
• In machine elements, variable loading is best characterized as:
• Which statement about screw thread terms is correct for a single-start thread?
• In hydrodynamic lubrication between a journal and bearing, which condition is essential for film formation?
• Which screw thread is adaptable to split type nut?
• Which material designation designates Music Wire?
• An offset provided in radial cam-translating-follower mechanism serves to:
• Which coupling is most suitable for transmitting power between two perfectly aligned shafts while requiring easy dismantling for maintenance?
• Is an acceleration parameter (with units of gravities) that depends on the natural frequency and the change in velocity, due to shock.
• For collinear shafts with easy manufacturing prioritized over dismantling ease, which coupling is commonly used?
• Which of the following is an example of accelerated strain aging in steel?
• Which coupling provides elasticity to absorb shock and accommodate shaft deflection?
• Static force on a gear tooth is due to which of the following?
• To promote uniform wear on meshing gear teeth, a design sometimes adds a feature known as hunting tooth addition. This practice is called?
• A newly installed clutch slips only under heavy acceleration, although the release mechanism is properly adjusted. Which condition should be investigated first?
• Spiral gears are suitable for transmitting
• In a beam of rectangular cross-section, how does the maximum shear stress compare to the average shear stress?
• Which one of the following causes whirling of shafts?
• What is the recommended speed for fabric belts?
• If numerous shallow pits are observed on the raceways of a bearing after several thousand hours of service, the damage is most likely caused by which of the following?
• Which machine tool produces flat surfaces by means of the reciprocating motion of a single-point cutting tool?
• Which component is used to transmit energy in CNC machine tools, providing precise linear motion?
• Which of the following will best describe sunk key?
• Compared with threaded fasteners, what is the primary advantage of a riveted joint?
• Which AISI tool steel is hardened in oil and has a low tendency to shrink or warp during heat treatment?
• Which group of wires experiences maximum stress when a wire rope passes around a drum?
• The working temperature range for soldering process is:
• Which key relies primarily on friction rather than shear to transmit torque?
• After an overloading that exceeds the elastic limit and subsequent unloading, the steel specimen behaves as:
• Which statement best explains the uniform wear assumption in plate clutch torque calculations?
• The capacity of a material to absorb energy during elastic deformation and recover that energy upon unloading is called what?
• Which factor is NOT typically considered when determining the horsepower rating for a standard roller chain?
• Which drawing is primarily prepared to show the relationship and fit of individual parts after fabrication?
• When a column is subjected to an eccentric load, the induced stress in the column is due to which components?
• In a double-riveted lap joint subjected to eccentric loading, why are the outer rivets generally more highly stressed?
• When meshed with a gear, it is used to change rotary motion to reciprocating motion.
• In watchmaking, which gear type is commonly used due to its tooth profile?
• In a simple gear train, if the number of idler gears is odd, the direction of motion of the driven gear will be the same as the driving gear.
• The clearance between the tooth profiles of a gear tooth.
• In a belt drive, the pulley acts as which type of kinematic pair?
• Which workholding device is preferred in high-production turning operations involving accurately sized bar stock?
• Chromium acts as a ferritic stabilizer.
• Which of the following is a common drilling machine for large workpieces that require stable mounting during drilling?
• Shoe is constrained to move towards the drum to compensate for the moment acting.
• A four-bar chain has
• Which hardness test uses indentation depth to determine a hardness value, often yielding a single numeric scale?
• 18/8 stainless steel contains which combination?
• According to Petroff's equation for lightly loaded journal bearings, the coefficient of friction between the journal and the bearing is directly proportional to which factor?
• In a reverted gear train, the input and output shafts are coaxial.
• Which welding process uses a non-consumable tungsten electrode and is shielded by a gas, usually argon or helium?
• In buckling load for a given material depends on
• For precision compression springs, which ASTM designation should be specified on the purchase order?
• Which type of loading is most associated with fatigue failure due to cycles?
• Which coupling permits axial assembly without moving either shaft longitudinally?
• Effective stress in wire ropes during normal working is equal to the stress due to
• The angle at the base cylinder of an involute gear, that the tooth makes with the gear axis.
• Pitch circle diameter of an involute gear is dependent on which parameter?
• Which clutch transmits power through positive engagement of interlocking members rather than relying on friction?
• In a solid circular shaft under torsion, doubling the diameter while keeping torque constant will cause the maximum shear stress to
• Which thread form is used for the lead screw of a lathe?
• Which combination of methods provides the most accurate estimate of fundamental natural frequency for a shaft with multiple loads?
• Shaft revolving in a bearing is the following type of pair
• Which machining operation is used to create a flat seating surface around a hole to support fasteners?
• What factor is most important to prevent loosening of a fastener under vibration?
• Which brake arrangement is described by a caliper that squeezes a rotor from both sides?
• In belt drives, "slip" refers to
• To maximize energy storage of a flywheel at a fixed speed, you should concentrate more mass near the rim rather than near the hub.
• If the controlling force line for a spring-controlled governor intersects the y-axis at the origin, the governor is said to be
• For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress is:
• A steel shaft rotates freely inside a bronze bushing with adequate lubrication clearance. Which class of fit is most appropriate?
• Which property can be calculated indirectly using the density and speed of sound in a material?
• For spur gears used in machine tool gearboxes, the minimum contact ratio should be more than which value?
• In high-speed steel, which element is a main constituent along with chromium and vanadium?
• In belt-drive terminology, the angle subtended by the belt while in contact with the pulley is known as the
• Which of the following is a unique form of cast iron with worm-shaped graphite particles?
• Ackermann steering gear consists of which type of pairs?
• Which of the following couplings can accommodate both angular and axial shaft displacement through the deformation of rubber bushes?
• Which drilling machine is typically used for machining large, heavy workpieces that cannot be conveniently repositioned during operation?
• Which of the following couplings is specifically intended to permit axial assembly without requiring either shaft to move longitudinally?
• Modern flywheel energy storage systems frequently operate in a vacuum chamber primarily to
• A drafter draws equally spaced thin lines inside a cut surface. These lines are called
• In a simple gear train with an odd number of idler gears, the driven gear direction is
• Which mineral is number 5 on the Mohs scale of hardness?
• In the detailed design of rim thickness and depth of bead, the assumed circular pitch (PC) value is which of the following?
• Spring driven watches and clocks utilize
• Which mineral corresponds to Mohs hardness No. 5?
• The designation Ø40 H7/g6 indicates the relationship between which two parts?
• Number of critical speeds for any shaft is
• A maintenance engineer identifies a spring wire marked ASTM A232. Which material is being inspected?
• What will be the effect in bushing gears without backlash?
• In a slider-crank mechanism, the maximum acceleration of the slider occurs when the crank is at which position?
• A mechanical press experiences highly fluctuating torque during every working stroke. Which flywheel property primarily allows it to smooth the speed variation?
• Rolling contact bearings as compared to sliding contact bearings have which of the following characteristics?
• When a cutting fluid leaks near a lathe, what should be done first?
• Nickel acts as an austenitic stabilizer, stabilizing which phase?
• Which key is commonly used on machine tool spindles because it permits axial movement of the hub without interrupting power transmission?
• Which value is the maximum typical degree of polymerization for commercial plastics?
• In aluminum-deoxidized steels, the coarsening temperature is reached well above the critical temperature. Which term represents this temperature?
• Which screw thread is stronger than other threads?
• Degrees of polymerization for commercial plastics are usually less than:
• Invar alloy is primarily alloyed with which element to achieve its characteristic properties?
• Power screws used for transmitting power should have which characteristic?
• Which mineral has Mohs hardness of 5?
• Which law governs the condition for continuous rotation in a planar four-bar linkage?
• In belt drives, slip refers to
• Which machining operation is primarily intended to improve the dimensional accuracy and surface finish of an existing drilled hole?
• A coupling used for absorbing some shock and vibration that may appear on one shaft and of preventing the occurrence of reversed stresses caused by the shaft deflecting at the coupling preventing at the coupling.
• When a circular hole in a metal plate expands uniformly with temperature, how does the hole area change relative to the plate area?
• Which key relies primarily on friction rather than shear to transmit torque?
• Which phenomenon causes slight cyclic variation in the speed of the driven sprocket of a roller chain transmission?
• Which option represents a single crystal grown by vapor deposition?
• If the rim speed doubles, the centrifugal tensile stress increases by what factor?
• Elastic nut is a locking device in which
• Permissible bending stress for a gear tooth is usually taken as which of the following?
• The path of contact in involute gears is which of the following?
• Which statement about arc temperatures matches the provided data?