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.Management Sciences
Category: CHEMICAL ENGINEERING
Solution used in Doctor’s treatment for the removal of mercaptans is_________________?
A. Sodium hydroxide
B. Sodium plumbite
C. Cupric chloride
D. Potassium isobutyrate
Dimension of surface tension is (where, F = force, L = length) ?
A. FL-1
B. F-1. L
C. F.L-2
D. F-2. L
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of_____________________?
A. Calcium sulphate
B. Sodium chloride
C. Sodium sulphate
D. Magnesium chloride
Capacity of a rotary gear pump can be varied by__________________?
A. Changing the speed of rotation
B. Bleeding air into suction
C. Bypassing liquid from the suction or discharge line
D. All A., B. and C.
For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law?
A. Increases
B. Decreases
C. Remain same
D. Either A. or B.; depends on the gas
Which of the following fractions of petroleum contains maximum sulphur ?
A. Diesel
B. Gasoline
C. Naphtha
D. Atmospheric residue
Shortest distance between two tubes is___________________?
A. Called tube pitch
B. Called tube clearance
C. More in case of triangular pitch as compared to square pitch of tube layout
D. None of these
The percentage slip in a reciprocating pump set is given by the % of (where, Q1 = actual discharge Q2 = theoretical discharge) ?
A. Q1/Q2
B. Q2/Q1
C. (Q2 – Q1)/Q1
D. (Q2 – Q1)/Q2
The dew point of an unsaturated gas-vapor mixture does not depend upon the _________________ of the mixture?
A. Composition
B. Temperature
C. Total pressure
D. All A, B. and C.
A body is called grey if the monochromatic emissivity of the body is___________________?
A. Zero
B. Unity
C. Same for all wavelengths
D. Different for all wavelengths
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