Machine Design
For same pulley diameters, center distance, belt speed and belt and pulley materials,

Crossed belt drive transmits more power than open belt drive
Open belt drive transmits more power than crossed belt drive
Open and crossed belt drives transmit same power
Power transmission does not depend upon open and crossed types of constructions

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A hollow saddle key is

Provided in pairs at right angles and each key is to withstand torsion in one direction only
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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When the belt speed increases

Power transmitted remains the same
Power transmitted decreases
Power transmitted increases to a maximum value and then decreases
Power transmitted increases

ANSWER DOWNLOAD EXAMIANS APP