A. Much more than that for fully open globe valves
B. Much less (say 2% than that for fully open globe valves)
C. Around 7
D. Both B. and C.
Related Mcqs:
- (Le/D) for fully open globe value may be around__________________?
A. 10
B. 25
C. 75
D. 300 - Needle valves are generally not used for___________________?
A. Very large diameter pipes
B. High pressure throttling service
C. Very accurate flow control
D. Smaller sizes of pipe - Safety valves are provided in chemical equipments to guard against excessive_________________?
A. Temperature
B. Pressure/pressure fluctuation
C. Turbulence
D. Noise - Brass valves are usually made for pipe sizes ______________ inches?
A. ≤ 1
B. ≤ 2
C. > 2.5
D. > 3.5 - To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of_________________?
A. (1.2)3/2
B. (1.2)3/5
C. (1.2)2/3
D. (1.2)5/3 - The LMTD correction factor (FT) is defined as the __________________?
A. Ratio of true temperature difference to the LMTD
B. Ratio of LMTD to the true temperature difference
C. Differenced of true temperature difference and the LMTD
D. Geometric mean of the true temperature difference and the LMTD - In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around __________________?
A. 0.5
B. 1.5
C. 2.5
D. 3.5 - In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a __________________?
A. Clearance of 25-75 mm
B. Cap pitch of 1.3-2 times the cap diameter
C. Either A. or B.
D. Neither A. nor B. - The function of manholes provided in the shell of a distillation column is to __________________?
A. Keep a check on the liquid gradient over the plate by direct visual observation
B. Give access to the individual trays for cleaning, maintenance and installation
C. Guard against foaming & entrainment by dumping antifoaming agent through it
D. All A., B. and C. - Longitudinal stress induced in a thin walled cylindrical storage vessel is __________________?
A. pD/2t
B. pD/4t
C. pD/3t
D. pD/6t
