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.Management Sciences
Category: CHEMICAL ENGINEERING
The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?
0
A. 20
B. 230
C. 750
D. 1500
The diameter of a propeller agitator used in agitation tank ranges from ____________ percent of the tank diameter and its peripheral speed is normally 300 to 500 metres/minute ?
A. 5 to 10
B. 15 to 30
C. 40 to 50
D. 55 to 75
Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an________________?
A. Weir
B. Hot wire anemometer
C. Cup and vane anemometer
D. None of these
Phenol formaldehyde resin is used as an adhesive in making__________________?
A. Laminates
B. Card boxes
C. Furniture
D. Books
Work hardening of a material ________________?
A. Decreases its tensile strength
B. Decreases its ductility
C. Increases its ductility
D. Does not affect its ductility
The cooling medium used in dry quenching of coke is___________________?
A. Nitrogen
B. Air
C. Phenolic water
D. Carbon dioxide
When a system is in equilibrium for all possible processes, the differential or finite change of entropy is__________________?
A. < 0
B. > 0
C. = 0
D. None of these
A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?
A. 0.16
B. 0.33
C. 0.66
D. 0.47
f = 16/NRe, is valid for__________________?
A. Turbulent flow
B. Laminar flow through an open channel
C. Steady flow
D. None of these
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