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431.

Rivets are driven in

A.	Cold condition	B.	Hot condition
C.	Either hot or cold condition

432.

For water tight joints such as in boiler the rivets are driven

A.	in cold condition only	B.	in hot condition only
C.	either in hot or cold condition

433.

All of the following statements are false except

A.	In a flange coupling, the bolts are subjected to compressive stress	B.	The resilience of a bolt may be increased by decreasing its shank diameter
C.	Oldham coupling is used for connecting piston rod of a steam engine to the cross head	D.	The pitch of a sinle threaded screw is equal to the lead

434.

The concentric helical springs are wound in opposite direction

A.	to maintain identical stiffness in both springs	B.	to avoid unequal deflection in the two springs
C.	to avoid binding of adjacent coils	D.	to maintain identical shear stress in the two springs

435.

Which of the following statement is false?

A.	Buttress threads are used to transmit power in one direction only	B.	In designing gear, the tooth is considered as a cantilever subjected to an end load
C.	Ball and roller bearings are anti-friction bearings	D.	The sleeve of a muff coupling is designed as a solid shaft

436.

Which of the following is a positive clutch?

A.	Band cluch	B.	Jaw clutch
C.	Disc clutch

437.

In an inverted tooth chain the included angle between the outer faces of the teeth?

A.	75 to 85	B.	60 to 75
C.	40 to 55	D.	35 to 45

438.

In case of a beam at the neutral axis.

A.	shear stress is maximum and bending stress is minimum	B.	shear stress is minimum and bending stress is maximum
C.	shear stress is minimum and bending stress is zero	D.	shear stress is zero and bending stress is maximum

439.

An out-of-plane web distribution is known as

A.	column buckling	B.	web buckling
C.	vertical web buckling	D.	any of the above

440.

The web crippling and web buckling may be prevented by

A.	increasing the thickness of web and reducing the length of bearing plates	B.	reducing the thickness of web and increasing the length of bearing plates
C.	increasing the thickness of web as well as the length of bearing plates	D.	reducing the thickness of web as well as the length of bearing plates