Machine Design
A hollow saddle key is

A taper key which fits half in the key way of hub and half in the key way of shaft
A taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
A taper key which fits in a key way of the hub and is flat on the shaft
Provided in pairs at right angles and each key is to withstand torsion in one direction only

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Cold working

Decreases the fatigue strength
Alone has no influence on fatigue strength
Increases the fatigue strength
Has no influence on fatigue strength

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
The fatigue stress concentration factor is defined as

The ratio of endurance limit without stress concentration to the endurance limit with stress concentration
The ratio of endurance limit with stress concentration to the endurance limit without stress concentration
The product of the endurance limits with and without stress concentration
All of these

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When the speed of belt increases,

The power transmitted will decrease
The coefficient of friction between the belt and pulley decreases
The coefficient of friction between the belt and pulley increases
The power transmitted will increase

ANSWER DOWNLOAD EXAMIANS APP