# Theory of Machine | Theory of Machine Objective Type Questions and answers

26. In a gear drive,module is equal to.......

A.1/diametral pitch

B.1/circular pitch

C.circular pitch/pai

D.diametral pitch/pai

E.pai/diametral pitch

A.1/diametral pitch

27. The type of coupling used to join two shfts whose axes are neither in same straight line nor parallel, but intersect is.......

A.flexible coupling

B.universal coupling

C.chain coupling

D.Oldham's coupling

E.American coupling

B.universal coupling

28. To obviate axial thrust, following gear drive is used.......

A.double helical gears having opposite teeth

B.double helical gears having identical teeth

C.single helical gear in which one of the teeth of helix angle *alfa* is more

D.mutter gears

E.none of the above

A.double helical gears having opposite teeth

29. Flexible coupling is used because.......

A.it is easy to disassemble

B.it is easy to engage and disengage

D.it prevents shock transmission and eliminates stress reversals

E.it increases shaft life

D.it prevents shock transmission and eliminates stress reversals

30. To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use......

A.spur gear

B.spiral gear

C.bevel gear

D.worm gear

E.crown gear

D.worm gear