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

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

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In gears, interference takes place when

Gears do not move smoothly in the absence of lubrication
Pitch of the gears is not same
Gear teeth are undercut
The tip of a tooth of a mating gear digs into the portion between base and root circles

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Open pairs are those which have

Two elements that permit relative motion
Point or line contact between the two elements when in motion
Elements of pairs not held together mechanically
Surface contact between the two elements when in motion

ANSWER DOWNLOAD EXAMIANS APP