Heat Transfer QUESTIONS AND ANSWERS

Mechanical Engineering : Heat Transfer QUESTIONS AND ANSWERS :: part4 : 6 to 10

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

6.Two plates spaced 150 mm apart are maintained at 1000�C and 70�C. The heat transfer will take place mainly by

convection

free convection

forced convection

radiation

radiation and convection.

7.The ratio of the energy absorbed by the body to total energy falling on it is called

absorptive power

emissive power

absorptivity

emissivity

none of the above.

8.Depending on the radiating properties, a body will be opaque when

p = 0, x = 0 and a = 1

p=l,x = 0anda = 0

p = 0, x = 1 and a = 0

x - 0, a + p = 1

a=0,x + p= 1.

9.In re generator type heat exchanger, heat transfer takes place by

direct mixing of hot and cold fluids

a complete separation between hot and cold fluids

flow of hot and cold fluids alternately over a surface

generation of heat again and again

indirect transfer.

10.The amount of radiation mainly depends on

nature of body

temperature of body

type of surface of body

all of the above

none of the above.

More Heat Transfer QUESTIONS AND ANSWERS available in next pages

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Mechanical Engineering Questions And Answers :: Heat Transfer: part4

Heat Transfer QUESTIONS AND ANSWERS

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