McqMate
Sign In
Hamberger menu
McqMate
Sign in
Sign up
Home
Forum
Search
Ask a Question
Sign In
McqMate Copyright © 2025
→
Mechanical Engineering
→
Heat Transfer (HT)
→
A black body when hot, emits heat radiat...
Q.
A black body when hot, emits heat radiation of __________ wavelengths.
A.
Small
B.
Large
C.
All
D.
One fixed
Answer» C. All
3.2k
0
Do you find this helpful?
18
View all MCQs in
Heat Transfer (HT)
Discussion
No comments yet
Login to comment
Related MCQs
When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by
A liquid to liquid counterflow heat exchanger is used to heat cold fluid from 50?C to 150?C. Assuming that the hot fluid enters at 250?C and leaves at 200?C, the log mean temperature difference for the heat exchanger will be closer to
The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body).
With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by
The surface which diffusely reflects and emits the same amount of energy which it receives by radiation is known as
Two bodies one hot and the other cold are kept in vacuum. What will happen to the temperature of the hot body after sometime?
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m2 .°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the