6. When the axes of the first and last wheels are co-axial, then the train is known as?
A. simple train of wheels
B. compound train of wheels
C. reverted gear train
D. epicyclic gear train
7. In vibration isolation system, if ?/?n < 2, then for all values of damping factor, the transmissibility will be (where ? = angular speed of the system, ?n = natural frequency of vibration of the system)?
A. zero
B. greater than 1
C. less than 1
D. equal to 1
9. The mechanism in which two are turning pairs and two are sliding pairs is called –
A. elliptical trammel
B. Scotch yoke mechanism
C. double slider crank chain
D. All of these
10. The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is –
A. ½ × µ W R cosec a
B. 2/3 × µ W R cosec a
C. µ W R cosec a
D. ¾ × µ W R cosec a