• HOME
  • QUIZ
  • CONTACT US
EXAMIANS
  • COMPUTER
  • CURRENT AFFAIRS
  • ENGINEERING
    • Chemical Engineering
    • Civil Engineering
    • Computer Engineering
    • Electrical Engineering
    • Mechanical Engineering
  • ENGLISH GRAMMAR
  • GK
  • GUJARATI MCQ

Heat and Mass Transfer

Heat and Mass Transfer
Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of

0.002
0.01
0.02
0.1

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
The heat transfer from a hot body to a cold body is directly proportional to the surface area and difference of temperatures between the two bodies. This statement is called

Newton's law of heating
First law of thermodynamics
Newton's law of cooling
Stefan's law

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
The emissivity for a black body is

0.75
1
0.5

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Absorptivity of a body will be equal to its emissivity

When system is under thermal equilibrium
At one particular temperature
At critical temperature
At all temperatures

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h₁, h₂ and h₃ respectively. The average heat transfer coefficient for the cube is

1/h₁ + 1/h₂ + 1/h₃
h₁ + h₂ + h₃
(h₁.h₂.h₃)1/3
None of these

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Metals are good conductors of heat because

Their atoms are relatively far apart
Their atoms collide frequently
They have high density
They contain free electrons

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Heat and Mass Transfer

DOWNLOAD APP

  • APPLE
    from app store
  • ANDROID
    from play store

SEARCH

LOGIN HERE


  • GOOGLE

FIND US

  • 1.70K
    FOLLOW US
  • EXAMIANSSTUDY FOR YOUR DREAMS.
  • SUPPORT :SUPPORT EMAIL ACCOUNT : examians@yahoo.com

OTHER WEBSITES

  • GUJARATI MCQ
  • ACCOUNTIANS

QUICK LINKS

  • HOME
  • QUIZ
  • PRIVACY POLICY
  • DISCLAIMER
  • TERMS & CONDITIONS
  • CONTACT US
↑