Related Questions

Mr. Ali decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured from the moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?
A 23 steps
B 16 steps
C 46 steps
D 26 steps
For same pulley diameters, center distance, belt speed and belt and pulley materials,
A Open belt drive transmits more power than crossed belt drive
B Crossed belt drive transmits more power than open belt drive
C Open and crossed belt drives transmit same power
D Power transmission does not depend upon open and crossed types of constructions
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 $$\frac{{2{\text{D}}}}{{{\text{D}} + {\text{d}}}}$$
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
In a center lathe, the cutting tool is fed in _________ with reference to the lathe axis.
A Cross direction only
B Longitudinal direction only
C Both cross and longitudinal direction
D Any direction
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 height and weighs of a solid cone are 6 cm and 2.7 kg. The weighs of a similar cone of 5 cm height is _____ .
A 9.75 kg
B 9.25 kg
C 6.25 kg
D 5.75 kg
If a cylinder of radius 7 cm and height 9 cm is melted and constructed into a cone of the same radius, what will be the height of this cone?
A 54 cm
B 9 cm
C 27 cm
D 13.5 cm
The height of a cone is 24 cm and the area of the base is 154 cm2. What is the curved surface area (in cm2) of the cone?
A 484
B 550
C 525
D 515
A sector of a circle of radius 5 cm is recast into a right circular cone of height 4 cm. What is the volume of the resulting cone?
A 12π cm2
B 33π cm3
C 32π cm2
D 4π cm2

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