The property of a bearing material which has the ability to accommodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as
A. Bondability
B. Embeddability
C. Comformability
D. Fatigue strength
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Antifriction bearings are
A. Sleeve bearings
B. Hydrodynamic bearings
C. Thin lubricated bearings
D. None of the above
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The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as
A. K t + 1 K f + 1
B. K t − 1 K f − 1
C. K f + 1 K t + 1
D. K f − 1 K t − 1
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Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?
A. Woodruff key
B. Feather key
C. Gib-head key
D. Tangent key
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The cold working of metals is carried out __________ the recrystallization temperature.
A. Above
B. Below
C. At
D. None of these
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A key made from a cylindrical disc having segmental cross-section, is known as
A. Woodruff key
B. Feather key
C. Flat saddle key
D. Gib head key
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The included angle in unified of American National threads is
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The metal suitable for bearings subjected to heavy loads is
A. White metal
B. Silicon bronze
C. Monel metal
D. Phosphor bronze
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The metal suitable for bearings subjected to light loads is
A. Silicon bronze
B. White metal
C. Monel metal
D. Phosphor bronze
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The objective of caulking in a riveted joint is to make the joint
A. Free from corrosion
B. Stronger in tension
C. Free from stress
D. Leak-proof
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When an open coiled helical compression spring is subjected to an axial load (W), the compression produced in the spring will be (where, n = No. of active turns of the spring and G = Modulus of rigidity for the spring material)
A. G d 4 2 W D 3 n
B. G d 4 4 W D 3 n
C. G d 4 8 W D 3 n
D. G d 4 16 W D 3 n
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A leaf spring in automobiles is used
A. To apply forces
B. To measure forces
C. To absorb shocks
D. To store strain energy
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The fatigue stress concentration factor is defined as
A. The ratio of endurance limit with stress concentration to the endurance limit without stress concentration
B. The ratio of endurance limit without stress concentration to the endurance limit with stress concentration
C. The product of the endurance limits with and without stress concentration
D. All of the above
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If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as
A. L b
B. 2 L b
C. 1 − 2 bL
D. 1 − L b
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The ratio of the ultimate stress to the design stress is known as
A. Elastic limit
B. Strain
C. Factor of safety
D. Bulk modulus
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If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)
A. B. P 1 + P 2
C. 2 1 ( P 1 + P 2 )
D. 2 1 ( P 1 + P 2 ) + P c
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If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (neglecting centrifugal tension) will be equal to (Where, Pc is centrifugal tension)
A. P 1 − P 2
B. P 1 + P 2
C. 2 1 ( P 1 + P 2 )
D. 2 1 ( P 1 + P 2 ) + P c
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Turn buckle has
A. Right hand threads on bout ends
B. Left hand threads on both ends
C. Left hand threads on one end and right hand threads on other end
D. No threads
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The angle of twist of shaft is
A. Directly proportional to (shaft diameter)2
B. Inversely proportional to (shaft diameter)2
C. Directly proportional to (shaft diameter)4
D. Inversely proportional to (shaft diameter)4
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Guest's theory of failure is applicable for following type of materials
A. Brittle
B. Ductile
C. Elastic
D. Plastic
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