141. For heavy thrust, the contact angle in tapered roller bearings varies between
A.28?30?
B.5?10?
C.2?5?
D.15-20?

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142. In a well greased ball bearing, the coefficient of friction may be
A.0.01 to 0.1
B.0.1 to 0.25
C.0.25 to 0.35
D.0.35 to 0.5

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143. Maximum fluctuation of energy is the
A.Variation of energy above and below the mean resisting torque line
B.Ratio of maximum and minimum energies
C.Difference between the maximum and minimum energies
D.Ratio of the maximum fluctuation of energy to the work done per cycle

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144. Coefficient of fluctuation of energy is the
A.Variation of energy above and below the mean resisting torque line
B.Ratio of maximum and minimum energies
C.Difference between the maximum and minimum energies
D.Ratio of the maximum fluctuation of energy to the work done per cycle

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145. Coefficient of fluctuation of speed is the
A.Variation of energy above and below the mean resisting torque line
B.Ratio of maximum fluctuation of speed to the mean speed.
C.Difference between the maximum and minimum energies
D.Ratio of the maximum fluctuation of energy to the work done per cycle

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146. In the rim type of flywheel, the major mass is
A.Concentrated around the periphery
B.Concentrated at the centre
C.Contributed due to arms
D.Ineffective

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147. The supply of working fluid to the engine to suit the load conditions is controlled by
A.Meyer's expansion valve
B.D-slide valve
C.Flywheel
D.Governor

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