Related Questions

In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be
A Increase key length
B Increase key depth
C Increase key width
D Double all the dimensions
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is
A $$\frac{{\text{D}}}{{{\text{D}} - {\text{d}}}}$$
B $$\frac{{\text{D}}}{{{\text{D}} + {\text{d}}}}$$
C $$\frac{{2{\text{D}}}}{{{\text{D}} - {\text{d}}}}$$
D $$\frac{{2{\text{D}}}}{{{\text{D}} + {\text{d}}}}$$
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
A pulley and belt in a belt drive form a
A Cylindrical pair
B Turning pair
C Rolling pair
D Sliding pair
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to
A Increase the key length
B Increase the key depth
C Increase the key width
D Decrease the key length
Two circular dials of exactly the same size are mounted on a wall side by side in such a way that their perimeters touch at one point. Dial 1, which is on the left , spins clockwise around its center , and dial 2 , which is on the right spins counter clockwise around its center . (Assume that there is no friction at the point of contact between the dials.) Each dial is marked on its perimeter at three points that are at equale distances around the points arked ondial 1 are N, O, and P and the points marked on dial 2 are X, Y, and Z. If points O and Z are just meeting at the point of contact between the dials , and if dial 1 spins at the same speed as dial 2, what is the smallest number of revolutions of each dial that will bring O and Z together again?
A 1
B 2
C 3
D 4
With a uniform speed , a car covers a distance in 8 hours . Had the same distance could have been increased by 4 km/hr. The same distance could have been covered in 7 hours and 30 minutes. What is the distance covered?
A 420 km
B 480 km
C 520 km
D 640 km
The coefficient of friction between the belt and pulley depends upon the
A Material of belt and pulley
B Slip of belt
C Speed of belt
D All of these
The timing belt is attached to the camshaft pulley and
A Timing belt drive pulley
B Distributor
C Radiator fan pulley
D Alternator pulley
Pulley in a belt drive acts as
A cylindrical pair
B turning pair
C rolling pair
D sliding pair

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