## Theory of Machine The frictional torque transmitted in a truncated conical pivot bearing, considering uniform pressure, is

(2/3). μ W cosecα (r₁ + r₂)
(1/2). μ W cosecα (r₁ + r₂)
(2/3). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]
(1/2). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]

## Theory of Machine Tangential acceleration direction is

Opposite to angular velocity
Along the angular velocity
Perpendicular to angular velocity
May be any one of these

## Theory of Machine In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

Maximum fluctuation of energy
Fluctuation of energy
Coefficient of fluctuation of energy
None of the listed here

## Theory of Machine Which of the following mechanism is obtained from lower pair?

Pantograph
All of these
Valve and valve gears
Gyroscope

## Theory of Machine The mechanism in which two are turning pairs and two are sliding pairs, is called a

Double slider crank chain
All of these
Elliptical trammel
Scotch yoke mechanism

## Theory of Machine In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

Slightly more than 45 mm
95 mm
45 mm
Slightly less than 45 mm