Old houses were often built with high ceilings in the rooms so that...

Q.

Old houses were often built with high ceilings in the rooms so that they would be cooler in the warmer months. This was to take advantage of

A. Convection

B. Conduction

C. Radiation

D. Insulation

Answer & Explanation

Answer : Option: A

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Q.

Choose the correct equation

A. Nu = (Re) (Pr) (Gz)

B. Nu = (Re) (Pr) (St)

C. Nu = (Re)(Pr)

D. Nu = (Pr)(St)

Answer & Explanation

Q.

Maximum heat transfer rate is obtained in ______ flow.

A. Laminar

B. Turbulent

C. Creeping

D. transition region

Answer & Explanation

Q.

The Convective heat transfer coefficient in case of fluid flowing in the tubes is not affected by the tube length/diameter ratio, if the flow is in the ______ zone.

A. Laminar

B. Transition

C. Both 'a' & 'b'

D. Highly turbulent

Answer & Explanation

Q.

A window glass of area (A) 1.5 m × 1 m and thickness (L) 6 mm is placed in a wall. If the outer (T1) and inner (T2) surface temperatures are 30°C and 20°C respectively, calculate the conduction heat transfer through the glass. Assume the thermal conductivity (K) of glass to be 0.78 W/mK.

A. 1740 W

B. 1590 W

C. 1660 W

D. 1950 W

Answer & Explanation

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Old houses were often built with high ceilings in the rooms so that...

Q. Old houses were often built with high ceilings in the rooms so that they would be cooler in the warmer months. This was to take advantage of

Start Discussion :

Comments :

More Questions Heat and Mass Transfer:

Q. Choose the correct equation

Q. Maximum heat transfer rate is obtained in ______ flow.

Q. The Convective heat transfer coefficient in case of fluid flowing in the tubes is not affected by the tube length/diameter ratio, if the flow is in the ______ zone.

Q. A window glass of area (A) 1.5 m × 1 m and thickness (L) 6 mm is placed in a wall. If the outer (T1) and inner (T2) surface temperatures are 30°C and 20°C respectively, calculate the conduction heat transfer through the glass. Assume the thermal conductivity (K) of glass to be 0.78 W/mK.

Q.

Old houses were often built with high ceilings in the rooms so that they would be cooler in the warmer months. This was to take advantage of

Q.

Choose the correct equation

Q.

Maximum heat transfer rate is obtained in ______ flow.

Q.

The Convective heat transfer coefficient in case of fluid flowing in the tubes is not affected by the tube length/diameter ratio, if the flow is in the ______ zone.

Q.

A window glass of area (A) 1.5 m × 1 m and thickness (L) 6 mm is placed in a wall. If the outer (T1) and inner (T2) surface temperatures are 30°C and 20°C respectively, calculate the conduction heat transfer through the glass. Assume the thermal conductivity (K) of glass to be 0.78 W/mK.