Film boiling occurs at ________________ pressure?
Film boiling occurs at ________________ pressure?
A. Atmospheric
B. Sub-atmospheric
C. Negative
D. Very high
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Which of the following has maximum thermal conductivity ?
Which of the following has maximum thermal conductivity ?A. Iron
B. Coal
C. Nitrogen
D. TarThe advantage of backward feed multiple effect evaporators over forward feed units is that___________________?
The advantage of backward feed multiple effect evaporators over forward feed units is that___________________?A. Heat sensitive material can be handled
B. There is no additional cost of pumg
C. Most concentrated liquid is at highest temperature
D. Equal heat transfer co-efficients exist in various effectsRemoval of ______________ heat is involved in the condensation of a vapor under saturated conditions?
Removal of ______________ heat is involved in the condensation of a vapor under saturated conditions?A. Super
B. Sensible
C. Latent
D. Both B. & C.Heat produced when a steady state current, I passes through an electrical conductor having resistance, ‘R’ is___________________?
Heat produced when a steady state current, I passes through an electrical conductor having resistance, ‘R’ is___________________?A. IR
B. I2R
C. IR2
D. I2R2Which of the following has the minimum absorptivity ?
Which of the following has the minimum absorptivity ?A. Aluminium foil
B. Coal dust
C. Refractory bricks
D. Iron platesThe range of electromagnetic spectrum important in heat transfer by radiation is ______________ microns?
The range of electromagnetic spectrum important in heat transfer by radiation is ______________ microns?A. 0.38-0.78
B. 0.5-50
C. 100-1000
D. 5-50