Questions
2
Thermal conductivity of solid metals with rise in temperature normally
Answer: Decreases
3
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
Answer: Conduction
4
When heat is Transferred by molecular collision, it is referred to as heat transfer by
Answer: Convection
5
Pick up the wrong case. Heat flowing from one side to other depends directly on
Answer: Thickness
6
Which of the following is a case of steady state heat transfer
Answer: Ciliated Epithelium
9
Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of
Answer: 0.02
10
Heat flows from one body to other when they have
Answer: Different Temperatures
11
The amount of heat flow through a body by conduction is
Answer: all of the above
13
Which of the following is expected to have highest thermal conductivity
Answer: Solid Ice
14
Which of the following has maximum value of thermal conductivity
Answer: Aluminium
15
Heat is transferred by all three modes of transfer, viz, conduction, convection and radiation in
Answer: Boiler
18
Film coefficient is defined as Inside diameter of tube
Answer: Thermal conductivity Equivalent thickness of film Specific heat x Viscocity
19
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
Answer: Intensity Of Radiation
20
Emissivity of a white polished body in comparison to a black body is
Answer: Lower
