Heat Transfer MCQs | Heat Transfer Multiple Choice Questions and Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
1 Unit of thermal conductivity in M.K.S. units is
A kcal/kg m2 °C
B kcal-m/hr m2 °C
C kcal/hr m2 °C
D kcal-m/hr °C

Answer: kcal-m/hr m2 °C
2 Thermal conductivity of solid metals with rise in temperature normally
A Increases
B Decreases
C Remains Constant
D May Increase Or Decrease Depending On Temperature

Answer: Decreases
Advertisement
Article and Schedule Quiz Start Test!
DOWNLOAD CURRENT AFFAIRS PDF FROM APP
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
A Conduction
B Convection
C Radiation
D Conduction And Convection

Answer: Conduction
4 When heat is Transferred by molecular collision, it is referred to as heat transfer by
A Conduction
B Convection
C Radiation
D Scattering

Answer: Convection
5 Pick up the wrong case. Heat flowing from one side to other depends directly on
A Face Area
B Time
C Thickness
D Temperature Difference

Answer: Thickness
6 Which of the following is a case of steady state heat transfer
A I.C. Engine
B Air Preheaters
C Heating Of Building In Winter
D None Of The Above

Answer: Ciliated Epithelium
7 Cork is a good insulator because it has
A Free Electrons
B Atoms Colliding Frequency
C Low Density
D Porous Body

Answer: Histamine
8 Thermal conductivity of water at 20°C is of the order of
A 0.1
B 0.23
C 0.42
D 0.51

Answer: 0.51
9 Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of
A 0.002
B 0.02
C 0.01
D 0.1

Answer: 0.02
10 Heat flows from one body to other when they have
A Different Heat Contents
B Different Specific Heat
C Different Atomic Structure
D Different Temperatures

Answer: Different Temperatures
11 The amount of heat flow through a body by conduction is
A directly proportional to the surface area of the body
B directly proportional to the temperature difference on the two faces of the body
C dependent upon the material of the body
D all of the above

Answer: all of the above
12 Which of the following has least value of conductivity
A Glass
B Water
C Plastic
D Air

Answer: Air
13 Which of the following is expected to have highest thermal conductivity
A Steam
B Solid Ice
C Melting Ice
D Water

Answer: Solid Ice
14 Which of the following has maximum value of thermal conductivity
A Aluminium
B Steel
C Brass
D Copper

Answer: Aluminium
15 Heat is transferred by all three modes of transfer, viz, conduction, convection and radiation in
A Electric Heater
B Steam Condenser
C Melting Of Ice
D Boiler

Answer: Boiler
16 Heat transfer by radiation mainly depends upon
A Its Temperature
B Nature Of The Body
C Kind And Extent Of Its Surface
D All Of The Above

Answer: All Of The Above
17 Unit of thermal diffusivity is
A m2/hr
B m2/hr°C
C kcal/m2 hr
D kcal/m.hr°C

Answer: m2/hr
18 Film coefficient is defined as Inside diameter of tube
A Equivalent thickness of film
B Thermal conductivity Equivalent thickness of film Specific heat x Viscocity
C Film coefficient x Inside diameter Thermalconductivity
D none of the above

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
A Emissivity
B Transmissivity
C Reflectivity
D Intensity Of Radiation

Answer: Intensity Of Radiation
20 Emissivity of a white polished body in comparison to a black body is
A higher
B Lower
C Same
D Depends Upon The Shape Of Body

Answer: Lower

Random GK Questions

Q. Which of the following judgments stated that Secularism and Federalism are the basic features of the Indian Constitution ?
Q. Where is Lake Superior, the largest freshwater lake in the world located?
Q. In humans, the sex chromosome complement is
Q. Which of the following has no blood, but respires?
Q. A Black Market is a situation where in
Q. The ninth mandala of the Rigveda samhita is devoted wholly to:
Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series