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43.

A self locking screw has

A.	fine threads	B.	coarse threads
C.	coefficient of friction > tangent of load angle	D.	hole for inserting split pin

44.

A stud

A.	has a head on one end and a nut fitted to the other	B.	has head at one end and other end fits into a tapped hole in the other part to be joined
C.	has both the ends threaded	D.	has pointed threads

45.

A tap bolt

A.	has a head on one end and a nut fitted to the other	B.	has head at one end and other end fits into a tapped hole in the other part \o be joined
C.	has both the ends threaded	D.	has pointed threads

46.

A tapered key which fits in a keyway in the hub and is flat on the shaft, is known as

A.	wood-ruff key	B.	feather key
C.	flat saddle key	D.	gib head key

47.

A tube has the following advantage over pipe

A.	lighter and easier to handle	B.	greater shock absorption
C.	smoother inside walls	D.	all of the above

48.

An alien bolt is

A.	self locking bolt	B.	same as stud
C.	provided with hexagonal depression in head	D.	used in high speed components

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