Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

Heat and Mass Transfer
Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

0.084027777777778

0.16736111111111

0.043055555555556

0.042361111111111

0.084027777777778

0.16736111111111

0.043055555555556

0.042361111111111

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Conduction is a process of heat transfer

None of these

From one particle of the body to another without the actual motion of the particles

From one particle of the body to another by the actual motion of the heated particles

From a hot body to a cold body, in a straight line, without affecting the intervening medium

None of these

From one particle of the body to another without the actual motion of the particles

From one particle of the body to another by the actual motion of the heated particles

From a hot body to a cold body, in a straight line, without affecting the intervening medium

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
The most commonly used method for the design of duct size is the

Dual or double method

Static regains method

Velocity reduction method

Equal friction method

Dual or double method

Static regains method

Velocity reduction method

Equal friction method

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
An ordinary passenger aircraft requires a cooling system of capacity.

8 TR

2 TR

10 TR

4 TR

8 TR

2 TR

10 TR

4 TR

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Thermal conductivity of solid metals with rise in temperature normally

May increase or decrease depending on temperature

Decreases

Increases

Remain constant

May increase or decrease depending on temperature

Decreases

Increases

Remain constant

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Depending on the radiating properties, a body will be black when (Where a = absorptivity, p = reflectivity, X = transmissivity.)

X = 0, a + p = 0

P= 1, T = 0 and a = 0

P = 0, x = 1 and a = 0

P = 0, x = 0 and a = 1

X = 0, a + p = 0

P= 1, T = 0 and a = 0

P = 0, x = 1 and a = 0

P = 0, x = 0 and a = 1

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer

Heat and Mass Transfer Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

Heat and Mass Transfer Conduction is a process of heat transfer

Heat and Mass Transfer The most commonly used method for the design of duct size is the

Heat and Mass Transfer An ordinary passenger aircraft requires a cooling system of capacity.

Heat and Mass Transfer Thermal conductivity of solid metals with rise in temperature normally

Heat and Mass Transfer Depending on the radiating properties, a body will be black when (Where a = absorptivity, p = reflectivity, X = transmissivity.)

Heat and Mass Transfer
Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

Heat and Mass Transfer
Conduction is a process of heat transfer

Heat and Mass Transfer
The most commonly used method for the design of duct size is the

Heat and Mass Transfer
An ordinary passenger aircraft requires a cooling system of capacity.

Heat and Mass Transfer
Thermal conductivity of solid metals with rise in temperature normally

Heat and Mass Transfer
Depending on the radiating properties, a body will be black when (Where a = absorptivity, p = reflectivity, X = transmissivity.)