Related Questions

The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)
A n
B n2
C 2n
D 2n - 1
The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.
A Heavier
B Lighter
C Moderate
D None of these
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.
A Same
B Opposite
C Perpendicular
D None of these
The velocity ratio for the third system of pulleys is
A n
B n2
C 2n
D 2n - 1
In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then
A open belt drive is recommended
B cross belt drive is recommended
C both open belt drive and cross belt drive are recommended
D the drive is recommended depending upon the torque transmitted
The vector sum of cutting velocity and chip velocity is __________ shear velocity.
A Equal to
B Less than
C More than
D None of these
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.
A 45
B 60
C 80
D 95
The angle of projection for a range is equal to the distance through which the particle would have fallen in order to acquire a velocity equal to the velocity of projection, will be
A [[[
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.
A Smaller
B Larger
C Either A or B
D None of these
Crowning on pulleys helps
A In increasing velocity ratio
B In decreasing the slip of the belt
C For automatic adjustment of belt position so that belt runs centrally
D Increase belt and pulley life

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