01. Convection
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Heat Transfer

149437 Statement A Convection involves flow of matter within a fluid due to unequal temperatures of its parts.
Statement B A hot bar placed under a running tap water loses heat due to effect of convection with in water.
Statement C Heat transfer always involves temperature difference between two systems. Identify the correct option.

1 A, B, C are true
2 Only $\mathrm{A}$ and $\mathrm{C}$ are true
3 Only A and B are true
4 Only B and C are true
TS- EAMCET-03.05.2019
Heat Transfer

149438 Assertion: Perspiration from human body helps in cooling the body.
Reason: A thin layer of water on the skin enhances its emissivity.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (c) If the Assertion is correct but Reason is incorrect.
3 (d.) If both the Assertion and Reason are incorrect.
4 If the Assertion is incorrect but the Reason is correct.
AIIMS-2006
Heat Transfer

149439 Assertion: It is hotter over the top of a fire than at the same distance of the sides.
Reason: Air surrounding the fire conducts more heat upwards.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2003]
Heat Transfer

149436 Which one of the following processes depends on gravity?

1 Conduction
2 Convection
3 Radiation
4 None of the above
BCECE-2005
Heat Transfer

149440 The freezer in a refrigerator is located at the top section so that :

1 the entire chamber of the refrigerator is cooled quickly due to convection
2 the motor is not heated
3 the heat gained from the environment is high
4 the heat gained from the environment is low
COMEDK 2016
NEET DIGITAL LIBRARY
Heat Transfer

149437 Statement A Convection involves flow of matter within a fluid due to unequal temperatures of its parts.
Statement B A hot bar placed under a running tap water loses heat due to effect of convection with in water.
Statement C Heat transfer always involves temperature difference between two systems. Identify the correct option.

1 A, B, C are true
2 Only $\mathrm{A}$ and $\mathrm{C}$ are true
3 Only A and B are true
4 Only B and C are true
TS- EAMCET-03.05.2019
Heat Transfer

149438 Assertion: Perspiration from human body helps in cooling the body.
Reason: A thin layer of water on the skin enhances its emissivity.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (c) If the Assertion is correct but Reason is incorrect.
3 (d.) If both the Assertion and Reason are incorrect.
4 If the Assertion is incorrect but the Reason is correct.
AIIMS-2006
Heat Transfer

149439 Assertion: It is hotter over the top of a fire than at the same distance of the sides.
Reason: Air surrounding the fire conducts more heat upwards.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2003]
Heat Transfer

149436 Which one of the following processes depends on gravity?

1 Conduction
2 Convection
3 Radiation
4 None of the above
BCECE-2005
Heat Transfer

149440 The freezer in a refrigerator is located at the top section so that :

1 the entire chamber of the refrigerator is cooled quickly due to convection
2 the motor is not heated
3 the heat gained from the environment is high
4 the heat gained from the environment is low
COMEDK 2016
Join With Us for More Updates
Heat Transfer

149437 Statement A Convection involves flow of matter within a fluid due to unequal temperatures of its parts.
Statement B A hot bar placed under a running tap water loses heat due to effect of convection with in water.
Statement C Heat transfer always involves temperature difference between two systems. Identify the correct option.

1 A, B, C are true
2 Only $\mathrm{A}$ and $\mathrm{C}$ are true
3 Only A and B are true
4 Only B and C are true
TS- EAMCET-03.05.2019
Heat Transfer

149438 Assertion: Perspiration from human body helps in cooling the body.
Reason: A thin layer of water on the skin enhances its emissivity.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (c) If the Assertion is correct but Reason is incorrect.
3 (d.) If both the Assertion and Reason are incorrect.
4 If the Assertion is incorrect but the Reason is correct.
AIIMS-2006
Heat Transfer

149439 Assertion: It is hotter over the top of a fire than at the same distance of the sides.
Reason: Air surrounding the fire conducts more heat upwards.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2003]
Heat Transfer

149436 Which one of the following processes depends on gravity?

1 Conduction
2 Convection
3 Radiation
4 None of the above
BCECE-2005
Heat Transfer

149440 The freezer in a refrigerator is located at the top section so that :

1 the entire chamber of the refrigerator is cooled quickly due to convection
2 the motor is not heated
3 the heat gained from the environment is high
4 the heat gained from the environment is low
COMEDK 2016
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Heat Transfer

149437 Statement A Convection involves flow of matter within a fluid due to unequal temperatures of its parts.
Statement B A hot bar placed under a running tap water loses heat due to effect of convection with in water.
Statement C Heat transfer always involves temperature difference between two systems. Identify the correct option.

1 A, B, C are true
2 Only $\mathrm{A}$ and $\mathrm{C}$ are true
3 Only A and B are true
4 Only B and C are true
TS- EAMCET-03.05.2019
Heat Transfer

149438 Assertion: Perspiration from human body helps in cooling the body.
Reason: A thin layer of water on the skin enhances its emissivity.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (c) If the Assertion is correct but Reason is incorrect.
3 (d.) If both the Assertion and Reason are incorrect.
4 If the Assertion is incorrect but the Reason is correct.
AIIMS-2006
Heat Transfer

149439 Assertion: It is hotter over the top of a fire than at the same distance of the sides.
Reason: Air surrounding the fire conducts more heat upwards.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2003]
Heat Transfer

149436 Which one of the following processes depends on gravity?

1 Conduction
2 Convection
3 Radiation
4 None of the above
BCECE-2005
Heat Transfer

149440 The freezer in a refrigerator is located at the top section so that :

1 the entire chamber of the refrigerator is cooled quickly due to convection
2 the motor is not heated
3 the heat gained from the environment is high
4 the heat gained from the environment is low
COMEDK 2016
NEET DIGITAL LIBRARY
Heat Transfer

149437 Statement A Convection involves flow of matter within a fluid due to unequal temperatures of its parts.
Statement B A hot bar placed under a running tap water loses heat due to effect of convection with in water.
Statement C Heat transfer always involves temperature difference between two systems. Identify the correct option.

1 A, B, C are true
2 Only $\mathrm{A}$ and $\mathrm{C}$ are true
3 Only A and B are true
4 Only B and C are true
TS- EAMCET-03.05.2019
Heat Transfer

149438 Assertion: Perspiration from human body helps in cooling the body.
Reason: A thin layer of water on the skin enhances its emissivity.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (c) If the Assertion is correct but Reason is incorrect.
3 (d.) If both the Assertion and Reason are incorrect.
4 If the Assertion is incorrect but the Reason is correct.
AIIMS-2006
Heat Transfer

149439 Assertion: It is hotter over the top of a fire than at the same distance of the sides.
Reason: Air surrounding the fire conducts more heat upwards.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
AIIMS-2003]
Heat Transfer

149436 Which one of the following processes depends on gravity?

1 Conduction
2 Convection
3 Radiation
4 None of the above
BCECE-2005
Heat Transfer

149440 The freezer in a refrigerator is located at the top section so that :

1 the entire chamber of the refrigerator is cooled quickly due to convection
2 the motor is not heated
3 the heat gained from the environment is high
4 the heat gained from the environment is low
COMEDK 2016