_____________ paint has the minimum absorption co-efficient?
_____________ paint has the minimum absorption co-efficient?
A. Black
B. White lead
C. Grey
D. Light cream
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The purpose of floating head in a heat exchanger is to_________________?
The purpose of floating head in a heat exchanger is to_________________?A. Avoid buckling of tubes
B. Provide support for tubes
C. Decrease the pressure drop
D. Facilitate its lengthening, if neededIn a single effect evaporator, the economy is________________?
In a single effect evaporator, the economy is________________?A. 1
B. < 1
C. > 1
D. None of theseA cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?
A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?A. Cube
B. Plate
C. Sphere
D. All will cool at the same rateHeat transfer by natural convection is enhanced in system with__________________?
Heat transfer by natural convection is enhanced in system with__________________?A. High viscosity
B. High co-efficient of thermal expansion
C. Low temperature gradients
D. Low density change with temperatureCpμ/K is termed as the ______________ number?
Cpμ/K is termed as the ______________ number?A. Grashoff
B. Nusselt
C. Prandtl
D. StantonAt Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the___________________?
At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the___________________?A. Buffer zone
B. Turbulent core
C. Both A. and B.
D. Viscous sub-layer