Machine Design
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Decrease the key length
Increase the key depth
Increase the key width
Increase the key length

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A woodruff key is

Capable of tilting in a recess milled out in the shaft
Fitted in pairs at right angles
A tapered key with head at one end
All of these

ANSWER DOWNLOAD EXAMIANS APP