What is the correct answer?


In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be

A. Double

B. Four times

C. Eight times

D. Sixteen times

Correct Answer :

A. Double

Related Questions

The body will sink down if the force of buoyancy is __________ the weight… Two pipe systems can be said to be equivalent, when the following quantities… The discharge through a small rectangular orifice is given by (where Cd… An error of 1% in measuring head over the crest of the notch (H) will… The hydraulic mean depth for a circular pipe of diameter (d) is A fluid whose viscosity does not change with the rate of deformation or… The divergent portion of a Venturimeter is made longer than convergent… The Cipoletti weir is a __________ weir. A nozzle is generally made of When a body, floating in a liquid, is given a small angular displacement,… The speed of sound in a ideal gas varies directly as its Euler's equation in the differential form for the motion of liquids is… The volume of a fluid __________ as the pressure increases. A flow is called sub-sonic, if the Mach number is For a perfect incompressible liquid, flowing in a continuous stream, the… Choose the wrong statement The length AB of a pipe ABC in which the liquid is flowing has diameter… A structure used to dam up a stream or river over which the water flows… The unit of kinematic viscosity in S. I. units is A piece of wood having weight 5 kg floats in water with 60% of its volume… The ratio of specific weight of a liquid to the specific weight of pure… According to Newton's law of viscosity, the shear stress on a layer of… Normal depth in open channel flow is the depth of flow corresponding to Flow occurring in a pipeline when a valve is being opened is The siphon will work satisfactorily, if the minimum pressure in the pipe… The most efficient section of a channel is A flow is called hyper-sonic, if the Mach number is In one dimensional flow, the flow The volumetric change of the fluid caused by a resistance is known as All the terms of energy in Bernoulli's equation have dimension of