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.Management Sciences
Category: CHEMICAL ENGINEERING
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ?
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A. Sodium silicate
B. Sodium borate
C. Sodium tripolyphosphate (STPP)
D. Caustic soda
High pressure fluid in a shell and tube heat exchanger should preferably be routed through the________________?
A. Tubes to avoid the expansion of high pressure shell construction
B. Shell side for smaller total pressure drop
C. Shell side, if the flow is counter-current and tube side if the flow is co-current
D. Shell side for large overall heat transfer co-efficient
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around _________________ Rm ?
A. 1.2 to 1.5
B. 2.5 to 3
C. 3 to 4
D. 5
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Chromel-constantan
D. All will give the same output
The average boiling point of aviation turbine fuel is closest to that of__________________?
A. Lubricating oils
B. LPG
C. Diesel
D. Kerosene
Maintenance cost of a ______________ pump for a particular duty is the least?
A. Centrifugal
B. Reciprocating
C. Volute
D. Gear
Cumene is the starting material for the production of________________?
A. Benzoic acid
B. Phenol and acetone
C. Isoprene
D. Styrene
When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids ?
A. At high fluid velocity
B. At low velocity
C. When fluid flows past a smooth surface
D. None of these
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