Air vessel provided in a reciprocating pump is for__________________?

A. Increasing the acceleration head
B. Making the friction in pipe uniform
C. Decreasing the acceleration head
D. None of these

For water, when the pressure increases, the viscosity_________________?

A. Also increases
B. Decreases
C. Remain constant
D. First decreases, and then increases

Foot valve provided in the pump is a ______________ valve?

A. Direction control
B. Back pressure
C. Relief
D. Pressure reduction

For the production of very high vacuum, a _____________ pump is normally used?

A. Diffusion
B. Centrifugal
C. Jet ejector
D. Piston

Bernoulli’s equation is dependent on the__________________?

A. First law of thermodynamics
B. Third law of thermodynamics
C. Law of conservation of momentum
D. None of these

Which of the following produces maximum pressure difference for transportation of gases ?

A. Vacuum pumps
B. Blowers
C. Fans
D. Compressors

Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?

A. H
B. 12.6 H
C. 13.6 H
D. 14.6 H

The head loss in turbulent flow in a pipe varies_________________?

A. Directly as the velocity
B. Inversely as the square of the velocity
C. Approximately as the square of the velocity
D. Inversely as the square of the diameter

Navier-Stokes equation is useful in the analysis of _____________ fluid flow problems?

A. Non-viscous
B. Viscous
C. Turbulent
D. Rotational

A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any „x‟? Assume incompressible one dimensional flow i.e., no gradients in the radial direction ?

A. VX = V0 + q (x3/L2D)
B. VX = V0 + ⅓q (x3/L2)
C. VX = V0 + 2q (x2/LD)
D. VX = V0 + (4/3) q (x3/L2D)