For the production of very high vacuum, a _____________ pump is normally used? A. Diffusion B. Centrifugal C. Jet ejector D. Piston

Foot valve provided in the pump is a ______________ valve? A. Direction controlB. Back pressure C. Relief D. Pressure reduction

For water, when the pressure increases, the viscosity_________________? A. Also increases B. Decreases C. Remain constantD. First decreases, and then increases

Air vessel provided in a reciprocating pump is for__________________? A. Increasing the acceleration headB. Making the friction in pipe uniform C. Decreasing the acceleration head D. None of these

Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the ____________ head? A. Manometric B. Total C. Static D. Friction

Multistage centrifugal pumps are generally used for________________? A. High head B. Low head but high discharge C. Highly viscous liquid D. Slurries of high solid concentration

Specific speed of a centrifugal pump depends upon the ______________ head? A. Suction B. Delivery C. ManometricD. None of these

The simple Pitot tube does not measure the________________? A. Static pressure B. Dynamic pressure C. Velocity at the stagnation pointD. All A., B. and C.

Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C.…

Transition from laminar flow to turbulent flow is aided by the__________________? A. Surface roughness and curvature (i.e. sharp corners) B. Vibration C. Pressure gradient and the compressibility of the flowing mediumD. All A., B. & C.