Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is_____________?
A. More
B. Same
C. Less
D. Twice
Month: March 2019
Diameter of bubble caps used in high pressure columns is ______________ as compared to that used in identical vacuum columns?
Diameter of bubble caps used in high pressure columns is ______________ as compared to that used in identical vacuum columns?
A. Less
B. More
C. Same
D. Either A. or B.; no generalisation can be made
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about ______________ mm of water column per metre height of packing?
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about ______________ mm of water column per metre height of packing?
A. 25-50
B. 50-75
C. 200-250
D. 750-1000
Which of the following lengths of heat exchanger tubes are normally not used in practice ?
Which of the following lengths of heat exchanger tubes are normally not used in practice ?
A. 2.5 metres
B. 6 metres
C. 10 metres
D. 0.5 metre
The operating pressure drop range in a bag filter is about ______________ mm water gauge?
The operating pressure drop range in a bag filter is about ______________ mm water gauge?
A. 50-150
B. 5-10
C. 500-1500
D. 1500-2500
The value of fouling factor depends upon the__________________?
The value of fouling factor depends upon the__________________?
A. Characteristic of process fluid
B. Velocity of process fluid containing suspended solids
C. Suspended solids in the fluid
D. All A., B. and C.
(Le/D) for fully open globe value may be around__________________?
(Le/D) for fully open globe value may be around__________________?
A. 10
B. 25
C. 75
D. 300
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer coefficient (hi) vanishes after a Reynold number of_____________?
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer coefficient (hi) vanishes after a Reynold number of_____________?
A. 1000
B. 3000
C. 5000
D. 10000
The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about ______________ kms?
The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about ______________ kms?
A. 1
B. 5
C. 15
D. 25
Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about _____________ kcal/hr.m2.°C?
Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about _____________ kcal/hr.m2.°C?
A. 1250
B. 2500
C. 7500
D. 15000