A. Very large diameter pipes
B. High pressure throttling service
C. Very accurate flow control
D. Smaller sizes of pipe
Related Mcqs:
- (Le/D) for fully open gate valves would be __________________?
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. - 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 - Column support for the roof of cylindrical storage tank must be provided for___________________?
A. Small diameter tanks
B. Large diameter tanks
C. Small diameter tall tanks
D. All tanks irrespective of their heights and diameters - Tube wall thickness depends on the corrosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than _____________ mm outside diameter is generally not recommended for fouling fluids ?
A. 16
B. 19
C. 28
D. 38 - At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally ?
A. Higher
B. Lower
C. Same
D. Unpredictable - Cylindrical shell thickness of rotary drier is generally _______________ mm?
A. 2-3
B. 18-22
C. 6-8
D. 12-15 - Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency___________________?
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease depending upon the plate spacing - Rivets are generally specified by the____________________?
A. Head diameter
B. Shank diameter
C. Overall length
D. None of these - In most of the shell and tube heat exchangers, the tube pitch is generally ______________ the tube diameter?
A. Less than
B. 1.25-1.50 times
C. 2.5 times
D. one-fourth of
