11. Past ME Board Question
In flange coupling the weakest element should be
A. flange
B. key
C. bolts
D. shaft
B
22. Past ME Board Question
A flange coupling is_
A. used for collinear shaft
B. used for non-collinear shafts
C. rigid coupling
D. flexible
A
33. Past ME Board Question
Universal coupling is_
A. used for collinear shafts
B. used for non-collinear shafts
C. type of flange coupling
D. rigid coupling
B
44. Past ME Board Question
Splines are used when_
A. the power transmitted is low
B. the power to be transmitted is high
C. axial relative motion between shafts and hub is necessary
D. flame hardening
C
55. Past ME Board Question
A type of coupling that allows slight amount of torsion angular flexibility due to introduction with some elast material cylindrically wrapped around the bolts in the flange.
A simple elastic bonded coupling
B. elastic material bushed coupling
C. elastic material bonded coupling
D. all of the above
B
6Past ME Board Question
A shaft is to be checked for concentricity. A suitable method of performing the check is.
A. bench centers and dial indicator
B. line shafting bearing alignment
C. observing vibration of the shafting
D. none of these
A
77. Past ME Board Question
What is the rotating member used in transmitting power?
A. shaft
B. counter shaft
C. axle
D. washer
A
88. Past ME Board Question
How do you call the key which permits axial relative motion between the shaft and hub?
A. Tangent key
B. Feather key
C. Gib head key
D. Woodruff key
B
99. Past ME Board Question
It is a good design practice for steel line shafting to consider a limit to the linear deflection of inch/foot length maximum.
A. 0.050
B. 0.010
C. 0.020
D. 0.060
B
1010. Past ME Board Question
Alloy steel axle under repeated load/stress will eventually fail if the load / stress is above the endurance for the steel under consideration. The endurance limit of the steel is therefore:
A. equal to the allowable stress of the module of elasticity
B. equal to half of the ultimate strength
C. equal to module of elasticity
D. equal to 80% of the elastic limit
B
1111. Past ME Board Question
Which of the following statement(s) is correct?
A. Cold rolled shafting as compared to hot rolled shafting is weaker.
B. Cold rolled shafting as compared to hot rolled shafting is stronger
C. Cold rolled shafting is a the same strength at compared to hot rolled shafting.
D. Cold rolled shafting has no.advantage over hot rolled shafting.
B
1212. Past ME Board Question
Axially located rectangular groove in a hub and shaft.
A. keyseat
B. cotter pin set
C. flute
D. setscrew point
A
1313. Past ME Board Question
Which of the following flanges is suitable for low and moderate pressure?
A Ring-flange
B. Lap joint flange
C. Tapered-hub flange
D. Welding neck type
A
1414. For a good design of flange coupling, the hub length must not be less than the shaft diameter.
A. twice
B. 1.5 times
C. thrice
D. 2.5 times
B
1515. Past ME Board Question
A shaft is designed on the basis of which of the following?
A. Strength
B. Rigidity
C. Strength and Rigidity
D. Flexibility
C
1616. Past ME Board Question
For machinery shafts, the permissible deflection is approximately
A. 0.02 in./ft
B. 0.03in .in./ft
C. 0.01in ./ft
D. 0.05in ./ft
A
1717. The couplings used to connect two shafts which are out of line, or non-parallel shafts.
A. Muff coupling
B. Oldham coupling
C. Universal coupling
D. Universal and Oldham coupling
D
1818. Past ME Board Question
For shafts, the shear due to bending is at maximum the neutral plane where the normal stress is
A minimum
B. constant
C. maximum also
D. zero
D
1919. Past ME Board Question
What is the other name given to short shafts on machines?
A. Spindles
B. head shafts
C. core shafts
D. all of these
A
2020. Past ME Board Question
Taper in key is provided on which side?
A. Bottom
B. Top
C. Both top and bottom
D. Any, depending on the situation
B
2121. In flange coupling, the bolt circle diameter is usually ___ the diameter of the shaft.
A. 3 times
B. 4 times
C. 5 times
D. twice
A
2222. Past ME Board Question
What is the other name given to a line shaft ?
A. countershaft
B. main shaft
C. Long shaft
D. Head shaft
B
2323. Past ME Board Question
Flexible shafts are usually made of what?
A. Solid steel rod
B. Thin mild steel rod
C. Wavy steel wires
D. None of these
C
2424. Past ME Board Question
The speed at which the center of mass will be equal the deflecting forces on the shaft; the shaft with its attached bodies will then vibrate violently, since the centrifugal force changes its direction as the shaft tum in
A. nominal speed
B. critical speed
C. relative speed
D. mean speed
B
2525. Which of the following is the coupling used to connec two shafts with a considerable angular misalignment?
A. Hooke's joint Coupling
B. Flange coupling
C. Sleeve Coupling
D. Oldham Coupling
A
2626. Past ME Board Question
An old rule of thumb for transmission shafting is that the deflection should not exceed of length between supports.
A. 0.01 in. per foot
B. 0.08 in. per foot
C. 0.02 in. per foot
D. 0.05 in. per foot
A
2727. Past ME Board Question
How do you call the key made from a cylindrical disc having segmental cross-section?
A. Feather key
B. Tangent key
C. Gib head key
D. Woodruff key
D
2828. Past ME Board Question
For transmission shafts the allowable deflection is 1 degree in a length of diameters.
A. 20
B. 25
C. 30
D 40
A
2929. It is known as the torque required to produce a twist one radian per unit length of the shaft.
A. Torsional rigidity
B. Polar deflection
C. Flexural rigidity
D. Minimum twisting moment
A
3030. What is the most commonly used cross-section of th
key?
A. Rectangular
B. Circular
C. Square
D. Trapezoidal
A
3131. Past ME Board Question
The motion of a shaft in a circular hole is an example motion.
A. successful constraint
B. free
C. completely constraint
D. incompletely constraint
D
3232. Past ME Board Question
A muff coupling is also known as
A. a rigid coupling
B. a flexible coupling
C. an adjustable coupling
D. a universal coupling
A
3333. Past ME Board Question
What is the limiting torsional deflection for machinery shafts, if the criteria of limiting torsional deflection vary from 0.08° per foot of length.
A. 1°
B. 2.5°
C. 2°
D. 3.5°
A
3434. Past ME Board Question
What type of key that allows the hub to move along the shaft but prevents the rotation of the shaft?
A. Woodruf Key
B. Feather Key
C. Gibbs Key
D. Square Key
B
3535. Past ME Board Question
What is the other name for Kennedy key?
A. tangential key
B. woodruff key
C. saddle key
D. rollpin
A
3636. Past ME Board Question
What type of fits used for involute spline ?
A. close fit
B. press fit
C. sliding fit
D. All of these
D
3737. What is the minimum number of bolts in a flange coupling?
A. 2
B. 3
C. 5
D. 4
B
3838. Past ME Board Question
Which of the following is used for permanent fits and similar to involute spines except that the pressure angle is 14.57°.
A. separation load
B. spline shaft
C. stub serrations
D. involute serrations
D
3939. Which of the following is the key to be used when relative axial movement of the hub is required?
A. Flat saddle key
B. Woodruff key
C. Feather key
D. Tangent key
C
4040. Past ME Board Question
It is used as a coupling, or in addition to another couplings where, in case of overload, there is danger of injury to machine or to material in process.
A. shear pin
B. flange coupling
C. involute serrations
D. king pin
A
4141. Which of the following is the type of coupling used to connect two shafts having relative speeds?
A Flexible coupling
B. Compression coupling
C. Flange coupling
D. Fluid coupling
D
4242. Past ME Board Question
What is the maximum shaft angle for a single Hooke's
coupling?
A 10°
B. 17°
C. 15°
D. 20°
C
4343. Past ME Board Question
Which of the following is the key provided in pairs at right angles and is to withstand torsion in one direction only?
A.Saddle key
B. Tangent key
C. Round key
D. Sunk key
B
4444. Past ME Board Question
Two shafts at right angles to each other may be connected by what arrangement?
A. half tum
B. quarter turn
C. 3/4 turn
D. one turn
B
4545. Past ME Board Question A typical hub length fall between,
A 1.25D to 2.5D
B. 1.D to 3.4D
C. 1.25D to 4.0D
D. D to 7.0D
A
4646. The couplings used to connect two shafts which are parallel and in line.
A Split coupling
B. Muff coupling
C. Compression coupling
D. Any of these
D
4747. In designing a flange coupling, the hub diameter is usually taken as the shaft diameter.
A one-half
B. 1.5 times to twice
C, thrice
D. 3.5 times
B
4848. Past ME Board Question
A key with one several patented methods of keying is driven or pressed into a hole that is small enough to close the slit, assembled in radial direction.
A fit key
B. roll pin
C. saddle key
D. pin key
B
4949. Past ME Board Question What do you think is the stress at the center of a solid shaft?
A. Maximum
B. Minimum
C. Infinite
D. None of these
B
5050. Past ME Board Question
Which type of fit on a hole-shaft system is specified as H7-s6?
A close fit
B. sliding fit
C. press fit
D. interference fit
D
5151. Past ME Board Question
Which of the following transmits power through frictional resistance only?
A. Saddle key
B. Sunk key
C. Square key
D. Wood ruff key
A
5252. Past ME Board Question
A coupling that transmit power via the frictional forces induced by pulling the flange toward each other over slotted tapered sleeves.
A flange coupling
B. ribbed compression coupling
C. rigid coupling
D. flanged compression coupling
D
5353. Past ME Board Question
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.
A. rigid coupling
B. flange coupling
C. flexible coupling
D. none of these
C
5454. Past ME Board Question
If two intersecting shafts are to be belt connected guide pulleys are to be used.
A. 1
B. 2
C. 3
D. 4
B
5555. Find the polar section modulus of a steel shafting was "D" as the diameter.
A .$πD^3 / 16$
B. $πD^3 / 32$
C. $πD^3 / 4$
D. $πD^3/64$
A
5656. The length of the hub should not be made lesser than the face width of the gear. Hub lengths usually vary from 1. 25D to 2D where D is the shaft diameter. What should be the reasonable diameter of steel hub?
A. 2D
B. 1.55 D
C. 1.8 D
D. 1.20 D
C
5757. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of how many degree/foot of length ?
A. 0.4 to 1
B. 0.08 to 1
C. 0.1 to 1
D. 0.6 to 1
B
5858. Shafts readily available in the market are made in many ways and wide variety of material composition. It is likely be cold drawn carbon steel in size smaller than inches diameter.
A. 3.75
B. 5
C. 4
D. 51/2
A
5959. Which of the following flanges is suitable for low and moderate pressure?
A. Ring-flange
B. Lap joint flange
C. Tapered-hub flange
D. Welding neck type
A
6060. Which of the following is a loose clearance fit that is used for properly lubricated bearings?
A. H6-07
B. H8-68
C. H7-68
D. all of these
D
6161. For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress is
A. minimum
B. constant
C. maximum also
D. zero
D
6262. The minimum value of numerical combined shock a fatigue factor to be applied in every case to the computed bending moment of the shaft is ____.
A. 2.0
B. 1.75
C. 1.5
D. 13
C
6363. A key that may either straight or tapered. It is usually a drive fit.
A. pin keys
B. gib-head keys
C. saddle keys
D. none of these
B
6464. Past ME Board Question
Which of the following is usually the radius that is to be considered in stress calculation for a hollow shaft subjected to torsion?
A. Outer radius
B. Inner radius
C. Mean radius
D. None of these
A
6565. It is used as a coupling, or in addition to another couplings where, in case of overload, there is danger of injury to machine or to material in process.
A. shear pin
B. flange coupling
C. involute serrations
D. king pin
A
6666. For a simple rigid type coupling (or muff coupling), two shafts are connected to the muff by means of what?
A. They are connected by a single key
B. They are connected by two keys
C. They are connected by using Bolts
D. All of these
B
6767. What is the limiting torsional deflection for machinery shafts, if the criteria of limiting torsional deflection vary from 0.08° per foot of length.
A. 1°
B. 2.5°
C. 2°
D. 3.5
A
6868. In the design of machine members, keys are generally made of
A.High carbon steel
B.Mild steel
C. Cast iron
D. Stainless Steel
B
6969. What is the torsional rigidity of a shaft?
A. It is the product of modulus of rigidity and polar moment of inertia
B. It is the ratio of modulus of rigidity and polar moment of inertia
C. It is the difference between polar moment of inertia and modulus of rigidity
D. None of these
A
7070. A key that are square or flat and tapered with head
A. pin key
B. gib-head key
C. saddle keys
D. none of these
B
7171. Past ME Board Question
To ensure an adequate factor of safety in the design d a shaft with standard keyway, the key width should be about
A. about half of the shaft diameter
B. about one fourth of the shaft diameter
C. about two-third of the shaft diameter
D. about one third of the shaft diameter
B
7272. Which of the following is the most preferred type of key for situation where large amount of impact type torque is to be transmitted in both direction of rotation?
A. Tangent key
B. Saddle Key
C. Feather key
D. Gib head key
A
7373. What type of key that allows the hub to move along the shaft but prevents the rotation of the shaft?
A Woodruf Key
B. Feather Key
C. Gibbs Key
D. Square Key
B
7474. Which of the following statements is true for universal coupling?
A.Universal coupling is used for colinear shaft only.
B.Universal coupling must be a rigid coupling
C.Universal coupling is a unique type of flange coupling.
D.Universal coupling is used for non-collinear shaft.
D
7575.A shaft's natural frequency of vibration is referred to as the
A. normal speed
B. high speed
C. critical speed
D. low speed
C
7676. Past ME Board Question
Generally, for a good design the thickness of the key as the diameter of the shaft?
A one-sixth
B. one-tenth
C. one-half
D. two-third
A
7777. What type of key is used when the gear is required to slide on the shaft?
A Semi-circular key
B. Feather key
C Woodruff key
D. Tangential key
B
7878. A coupling that transmit power via the frictional forces induced by pulling the flange towards each other over slotted tapered sleeves.
A flange coupling
B. ribbed compression coupling
C. rigid coupling
D. flanged compression coupling
D
7979. Past ME Board Question
Which of the following will best describe sunk key?
A. the keyway is helical along shaft
B. the keyway is cut in shaft only
C. the keyway is cut in hub only
D. the keyway is cut in both shaft and hub
D
8080. Which of the following is experienced by the shaft as it transmits power through gears?
A. Bending stress only
B. Torsional stress only
C. Constant bending and varying torsional stress
D. Constant torsional stress and fluctuating axial stress.
C
8181. It is a general practice to use the following allowable stresses 4000 psi for main transmitting shaft and 8500 psi for small short shafts and counter shaft, for lineshaft carrying pulley it is ____ psi
A. 7800
B. 6000
C. 7000
D. 6500
B
8282. Past ME Board Question
Which of the following is the key that will most likely be used for light work?
A. Saddle key
B. Tangent key
C. Round key
D. Sunk key
A
8383. Which of the following is the standard taper provided in a taper key?
A. 1:100
B. 1:40
C. 1:120
D. 1: 60
A
8484. Past ME Board Question
A coupling that allows axial flexibility/movement in the operation. Made of alternate bolting of steel, leather. fabric and/or plastic material into the two flanges
A. flexible disk coupling
B. flexing Oldham coupling
C. flexible toroidal spring coupling
D. elastic-material bonded coupling
A
8585. Past ME Board Question
Which type of key is used for mounting shifting gears in gear boxes?
A. Splines
B. Square
C. Saddle
D. Flat
A
8686. Past ME Board Question
Which of the following is the type of key in which-width and thickness are equal?
A Flat key
B. Square key
C. Pin key
D. Barth key
B
8787. Past ME Board Question
For key design, the typical hub lengths (L) in relation with the shaft diameter (D) is,
A 1.25D to 2.4D
B. 1.5D to 1.25D
C. 2.4D to 3.5D
D. Depends on shaft diameter
A
8888. What is the largest twisting moment which a shaft section can resist?
A. The torsional rigidity of the shaft.
B. Maximum shear stress x unit strain
C. Maximum shear stress x polar modulus
D. Ratio of the polar moment of inertia and section modulus
C
8989. Past ME Board Question
How do you call the speed at which a rotating shaft becomes dynamically unstable?
A. Normal speed
B. Variable speed
C. Critical speed
D. Average speed
C
9090. Past ME Board Question
The shaft's angle of twist is proportional to which of the following?
A. Directly proportional to the square of its diameter
B. Inversely proportional to the square of its diameter
C. Inversely proportional to the 4th power of its diameter
D. directly proportional to the 4th power of its diameter
C
9191. Past ME Board Question
At certain speeds called the critical speeds, a rotating shaft will become dynamically unstable and the resulting vibrations and deflections can result in damage not only to the shaft but to the machine of which it is a part. At what percentage of the critical speed should a shaft be safely operated?
A. $\pm20\%$
B. $\pm5\%$
C . $\pm10\%$
D. $\pm12\%$
A
9292. The bolts in a rigid coupling connecting two shafts that transmit power are subjected to
A. Axial force only
B. Torsional stress only
C. Shear force and bending moment
D. Compressive stress and transversal force
C
9393. Past ME Board Question
Which of the following is the weakest element in flange coupling?
A. key
B. bolt
C. flange
D. shaft
A
9494. Past ME Board Question
The critical speed of the shaft depends on which of the following?
A. dynamic stability
B. mass only
C. stiffness only
D. mass and stiffness
D
9595. Past ME Board Question
For which of the following where splined shaft is commonly used?
A. Aircraft
B. Bicycle
C. Lathe machine
D. automobiles
D
9696. Past ME Board Question
The steel key that is usually considered strong in failure by shear and crushing?
A. Square
B. Rectangular
C. Circular
D. Flat
A
9797. Past ME Board Question
Which of the following is considered in the design of axles?
A. Twisting moment only
B. Bending moment only
C. Combined torsion and bending moment
D. Combined axial and transversal moment
C
9898. The material used for ordinary commercial shafting is
A. wrought iron
B. high speed steel
C. high grade steel
D. mild steel
D
9999. This is a form of flexible coupling that is especially adapted for connecting two shafts which are parallel but not in line.
A. Oldham Coupling
B. Flexible Coupling
C. Flange Coupling
D. Sleeve Coupling
A
100100. Past ME Board Question
This is also known as compression coupling or spit muff coupling.
A. Clamp coupling
B. Fluid coupling
C. Oldham coupling
D. Bellows
A