A. Preferably flow inside the tube for its easier internal cleaning
B. Preferably flow outside the tube
C. Flow at a very slow velocity
D. Flow outside the tube, when the flow is counter-current and inside the tube when the flow is
co-current
Related Mcqs:
- Tube wall thickness depends on the corrosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than _____________ mm outside diameter is generally not recommended for fouling fluids ?
A. 16
B. 19
C. 28
D. 38 - ___________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids?
A. Sieve plate
B. Packed
C. Bubble cap plate
D. None of these - Cooling water fouling factors vary in the range of 0.001 to 0.003____________________?
A. (BTU/hr.ft2. °F)-1
B. (kcal/hr.m2.°C)-1
C. (W/m2.°K)-1
D. (kcal/hr. m. °C)-1 - 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. - Fouling factor must be included in the calculation of overall design heat transfer coefficient, when the liquid__________________?
A. Containing suspended solids flows at low velocity
B. Containing suspended solids flows at high velocity
C. Is highly viscous
D. Is of high specific gravity - At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure____________________?
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease depending upon the solubility of the gas in the liquid - Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate ?
A. 2
B. ½
C. 4
D. 8 - Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger ?
A. The corrosive and fouling fluid should be preferably routed through the tubes
B. The viscous fluid should be routed through the shell side
C. Lower flow rate fluid should be routed through the shell side
D. Higher pressure fluid stream should be routed through the shell side - The buckling tendency of compression members is always in the direction of the _____________________?
A. Least radius of gyration
B. Axis of the load
C. Perpendicular to the axis of the load
D. None of these - For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is_________________?
A. d1/(d1 + d2)
B. d2/(d1 + d2)
C. (d1 + d2)/d1
D. (d1 + d2)/d2
