In most machine members, the damping capacity of the material should be
A. Low
B. Zero
C. High
D. Could be anything
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Which of the following bearing is preferred for oscillating conditions?
A. Double row roller bearing
B. Taper roller bearing
C. Angular contact single row ball bearing
D. Needle roller bearing
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The contact ratio for gears is
A. Zero
B. Less than one
C. Greater than one
D. None of these
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Which of the following material has the maximum ductility?
A. Copper
B. Mild steel
C. Aluminium
D. Zinc
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In radial bearings, the load acts __________ to the axis of rotation.
A. Parallel
B. Perpendicular
C. Both A and B
D. None of these
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Basic hole is one
A. Whose upper deviation is zero
B. Whose lower deviation is zero
C. Whose lower as well as upper deviations are zero
D. Does not exist
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Tapered roller bearings can take
A. Axial load only
B. Both radial and axial loads and the ratio of these being greater than unity
C. Radial load only
D. Both radial and axial loads and the ratio of these being less than unity
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The power transmitted by means of a belt depends upon
A. Velocity of the belt
B. Tension under which the belt is placed on the pulleys
C. Arc of contact between the belt and the smaller pulley
D. All of the above
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In a multiple V-belt drive, if one of the belts break, then
A. Only the broken belt is replaced
B. The entire set of belts is replaced
C. The broken belt and the belt on either side of it, is replaced
D. The broken belt need not to be replaced
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The resultant axial load on a bolt depends upon
A. External load applied
B. Initial tension due to tightening of the bolt
C. Relative elastic yielding of the bolt and the connected members
D. All of the above
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The process extensively used for making bolts and nuts is
A. Hot piercing
B. Extrusion
C. Cold peening
D. Cold heading
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In a marine flange coupling, the pitch circle diameter of bolts is taken as
A. 1.2 d
B. 1.6 d
C. 2 d
D. 2.5 d
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A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
A. Partially
B. Fully
C. Either A or B
D. None of these
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In a steam engine, the valve rod is connected to an eccentric rod by means of
A. Cotter joint
B. Knuckle joint
C. Universal joint
D. Flange coupling
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An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by
A. Increasing the length of bar
B. Decreasing the cross-sectional area of the bar
C. Decreasing the modulus of elasticity of the bar
D. All of the above
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Cap screws are
A. Similar to small size tap bolts except that a greater variety of shapes of heads are available
B. Slotted for a screw driver and generally used with a nut
C. Used to prevent relative motion between parts
D. Provided with detachable caps
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All stresses produced in a belt are
A. Compressive stresses
B. Tensile stresses
C. Both tensile and compressive stresses
D. Shear stresses
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The included angle for the British Association thread is
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The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called
A. Working depth
B. Clearance
C. Backlash
D. Face width
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In nitrated parts, the origins of the fatigue cracks will occur at
A. Surface
B. Just below the surface
C. Within the core
D. None of the above
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