A. 5-10
B. 15-20
C. 30-35
D. 35-40
Related Mcqs:
- The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?
A. Working
B. Damaging
C. Allowable
D. None of these - Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the_______________?
A. Flow rates of each fluid
B. Type and size of packing
C. Concentration of each fluid
D. All A, B. & 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 - Correct use of ‘factor of safety’ is very important in equipment design. It is defined as the ratio of the___________________?
A. Ultimate stress to breaking stress
B. Ultimate stress to working stress
C. Working stress to ultimate stress
D. None of these - Safety valves are provided in chemical equipments to guard against excessive_________________?
A. Temperature
B. Pressure/pressure fluctuation
C. Turbulence
D. Noise - 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 - The thickness of heat transfer plates used in the plate type heat exchanger ranges from _____________ mm, pressed in a single piece provided with grooves & corrugations?
A. 0.3 to 0.8
B. 1.25 to 3.125
C. 3.5 to 7.0
D. 8 to12 - LMTD correction factor is used in heat exchanger design for____________________?
A. Double pipe heat exchanger
B. Multipass shell and tube heat exchanger
C. Fouling fluids
D. Counter flow of hot and cold fluids - It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than _________________?
A. 0.99
B. 0.95
C. 0.80
D. 0.55 - In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones; because the smaller diameter tubes ______________?
A. Are easier to clean
B. Are less prone to fouling
C. Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
D. None of these