A. 4
B. 11.6
C. 0
D. 18.6
CHEMICAL ENGINEERING
Unsteady non-uniform flow is represented by flow through a/an_________________?
A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at increasing rate
D. Expanding tube at constant rate
Schmidt number and Lewis number for pure air at atmospheric conditions are respectively__________________?
A. < 1 and ≈ 1
B. 1 and 0
C. > 1 and ≈ 1
D. 0 and ≈ 1
Teflon is__________________?
A. Phenol formaldehyde
B. An inorganic polymer
C. Polytetrafluroethylene (PTFE)
D. A monomer
Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always_________________?
A. Less than arithmetic mean value
B. More than arithmetic mean value
C. More than geometric mean value
D. Both B. & C.
If Blasius or Darcy friction factor is ‘f1’ then the Fanning friction factor is equal to____________________?
A. f1/4
B. 4f2
C. 2f1
D. f1/2
Atomic ______________ of an element is a whole number?
A. Weight
B. Number
C. Volume
D. Radius
If the interest rate of 10% per period is compounded half yearly, the actual annual return on the principal will be ______________ percent ?
A. 10
B. 20
C. > 20
D. < 20
To reduce the stack loss, heat recovery from flue gas can be done by_____________________?
A. Preheating of cold stock
B. Preheating of combustion air
C. Steam generation in waste heat boilers
D. All A., B. and C.
Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces____________________?
A. Ammonium phosphate
B. Superphosphate
C. Triple superphosphate
D. None of these
