A. Fluid flow control is required
B. Fluid contains dispersed solid particles
C. Valve is required to be either fully open or fully closed
D. One way flow is required
Related Mcqs:
- A 2″ gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is__________________?
A. Δp
B. < Δp
C. > Δp
D. Δp2 - For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is___________________?
A. More
B. Less
C. Equal
D. Either A. or B.; depends on the viscosity of the fluid - The valve used for very remote and accurate control of fluid is a _____________ valve?
A. Needle
B. Globe
C. Gate
D. Butterfly - Remote control valve is a _______________ valve?
A. Gate
B. Butterfly
C. Needle
D. Globe - The inherent characteristic of an equal percentage valve relating flow rate ‘q’ with valve stem movement ‘x’ are described by the equation_________________?
A. dq/dx = K
B. dq/dx = K.q
C. dq/dx = K/q
D. dq/dx = Kq2 - Foot valve provided in the pump is a ______________ valve?
A. Direction control
B. Back pressure
C. Relief
D. Pressure reduction - Purpose of relief valve in a reciprocating pump is to___________________?
A. Protect the pump against developing excessive pressure
B. Facilitate unidirectional flow of liquid
C. Reduce the discharge pressure
D. Control the rate of discharge - The valve commonly used in pipes larger than 2″ dia is a______________?
A. Globe valve
B. Plug-cock
C. Gate valve
D. Check valve - While starting an axial flow pump, its delivery valve should be kept _______________?
A. Open
B. Closed
C. Either open or closed
D. None of these - Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the_______________?
A. Back flow of fluid in the event of stoppage of pump
B. Discharge pressure
C. Flow of liquid during operation of the pump
D. All A., B. and C.
