A. 5 to 10
B. 15 to 30
C. 40 to 50
D. 55 to 75
Related Mcqs:
- The ratio, (propeller agitator dia/tank dia) is normally taken as____________________?
A. 0.15-030
B. 0.5-0.65
C. 0.75-0.85
D. 0.60-0.90 - Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of ______________ times the paddle diameter?
A. 0.1 to 0.25
B. 0.3 to 0.5
C. 0.5 to 0.6
D. 0.65 to 0.80 - The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)_________________?
A. 0.5 d
B. 0.75 d
C. d
D. 2 d - In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as___________________?
A. 0.1
B. 0.8
C. 0.25
D. 0.5 - Speed of industrial paddle agitator ranges from _____________ rpm?
A. 1 to 5
B. 20 to 100
C. 500 to 750
D. 1000 to 2000 - The minimum shell thickness for tank ≤ 15 metres diameter is limited to _______________ mm, for reasons of elastic stability?
A. 2
B. 5
C. 10
D. 15 - Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ____________________ poise?
A. 300
B. 600
C. 1000
D. 1500 - Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about ______________ mm?
A. 10
B. 50
C. 100
D. 200 - In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about _______________ cms?
A. 10
B. 20
C. 30
D. 35 - In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed _______________________ of the column diameter?
A. 1/10-1/15th
B. 1/5-1/10th
C. 1/20-1/30th
D. 1/2 to 1/4th
