Question

Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.

a.

1

b.

7

c.

18

d.

26

Answer: (b).7

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. In natural convection heat transfer, the correlating parameter is the

Q. Boiling of milk in an open vessel is an example of __________ boiling.

Q. Pick out the wrong statement.

Q. The value of Stefan-Boltazman constant in SI unit is

Q. The unit of heat transfer co-efficient is

Q. For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of

Q. The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m⁻¹.°C⁻¹ respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m⁻².°C⁻¹. The rate of heat loss from the outer surface in W.m⁻² is

Q. Value of Nusselt number [Nu = (hD/k)] for the heat transfer by conduction from a droplet or a spherical particle to a surrounding stagnant film is

Q. Pick out the wrong statement.

Q. Evaporation by thermocompression results in the

Q. Forced circulation evaporators are normally used for concentrating liquids having

Q. Steam economy in case of a triple effect evaporator will be

Q. In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Q. Multiple effect evaporation accounts for

Q. In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is

Q. Maximum water velocity in tubes of a 1-2 shell and tube heat exchanger may be around __________ metres/second.

Q. In Biot number, the characteristic length used is the ratio of the __________ of the solid.

Q. Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

Q. Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re^0.8 . Prⁿ, is not valid, if the value of

Q. Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

Recommended Subjects

Are you eager to expand your knowledge beyond Basic Chemical Engineering? We've handpicked a range of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!