Joint efficiency (J) for a seamless pipe is_______________?
Joint efficiency (J) for a seamless pipe is_______________?
A. 1
B. 0.85
C. 1.5
D. < 0.5
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Liquid gradient over the tray results due to the___________________?
Liquid gradient over the tray results due to the___________________?A. Resistance offered to flow of liquids by caps & risers and the flow of gas
B. Low gas velocity
C. Large plate spacing
D. Large reflux ratioMaximum allowable vapour velocity in a bubble cap tower is determined by the ____________________?
Maximum allowable vapour velocity in a bubble cap tower is determined by the ____________________?A. Entrainment considerations
B. Vapour density
C. Diameter of the column
D. None of theseSpeed of the drum of the rotary vacuum filter normally ranges from _____________ rpm?
Speed of the drum of the rotary vacuum filter normally ranges from _____________ rpm?A. 0.1 to 2
B. 5 to 7
C. 3 to 8
D. 8 to 15At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally ?
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(Le/D) for fully open gate valves would be __________________?
(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._______________ shaped roof is most commonly used for cylindrical tanks ?
_______________ shaped roof is most commonly used for cylindrical tanks ?A. Cone
B. Dome
C. Umbrella
D. Flat