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131.

A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

A.	5	B.	10
C.	20	D.	40

132.

In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

A.	50	B.	100
C.	150	D.	200

133.

In a wormed geared pully block, if the number of teeth one the worm wheel is doubled, then its velocity ratio is also doubled.

True

False

134.

All the steel trusses of the bridges, have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable.

True

False

135.

A framed structure is perfect, if the number of members are

A.	equal to	B.	less than
C.	greater than	D.	either (b) or (c)

136.

A framed structure is imperfect, if the number of members are

A.	equal to	B.	less than
C.	greater than	D.	either (b) or (c)

137.

A redundant frame is also called

A.	perfect	B.	imperfect
C.	deficient

138.

Which of the following is a scalar quantity?

A.	Force	B.	Speed
C.	Velocity	D.	Acceleration

139.

The rate of change of displacement of a body is called

A.	velocity	B.	acceleration
C.	momentum	D.	none of these

140.

Which of the following are vector quantities?

A.	Linear displacement	B.	Linear velocity
C.	Linear acceleration	D.	all of these