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.Management Sciences
Category: CHEMICAL ENGINEERING
Correct use of ‘factor of safety’ is very important in equipment design. It is defined as the ratio of the___________________?
A. Ultimate stress to breaking stress
B. Ultimate stress to working stress
C. Working stress to ultimate stress
D. None of these
Cavitation can be prevented by________________?
A. Suitably designing the pump
B. Maintaining the suction head sufficiently greater than the vapour pressure
C. Maintaining suction head = developed head
D. Maintaining suction head lower than the vapour pressure
Maximum alumina content in high alumina refractory can be as high as _____________ percent?
A. 30
B. 50
C. 70
D. 90
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ?
A. Continues to increase
B. Continues to decrease
C. Goes through a minimum
D. Goes through a maximum
Lead is poured into the joint between two _______________ pipes ?
A. Mild steel
B. Concrete
C. Cast iron
D. Asbestos cement
Property responsible for the talcum powder to cling to the skin is the__________________?
A. Capillary action
B. Adhesion
C. Cohesion
D. Surface tension
For contacting a highly soluble gas with a liquid ____________________?
A. Bubble the gas through liquid
B. Spray the liquid on gas stream
C. Either A. or B. would suffice
D. None of these
The third law of thermodynamics states that the__________________?
A. Heat capacity of a crystalline solid is zero at absolute zero temperature
B. Heat transfer from low temperature to high temperature source is not possible without external
work
C. Gases having same reduced properties behaves similarly
D. None of these
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