The desirable property of a refrigerant is

1.  Low boiling point and specific heat of liquid

2.  High critical temperature and latent heat of vaporization

3.  Low specific volume of vapour

4.  All of these

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4
Correct Answer :

All of these


Explanation :
No Explanation available for this question

Ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

1.  Humidity ratio

2.  Relative humidity

3.  Absolute humidity

4.   Degree of saturation

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4
Correct Answer :

Degree of saturation


Explanation :
No Explanation available for this question

The relative humidity is defined as the

1.  Mass of water vapour present in 1 m3 of dry air

2.  Mass of water vapour present in 1 kg of dry air

3.  Ratio of actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure

4.  Ratio of actual mass of water vapour in a give volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

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4
Correct Answer :

Ratio of actual mass of water vapour in a give volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure


Explanation :
No Explanation available for this question

For unsaturated air, the dew point temperature as compared to wet bulb temperature is

1.  Equal

2.  Less

3.  More

4.  Unpredictable

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4
Correct Answer :

Less


Explanation :
No Explanation available for this question

The dry bulb temperature lines, on the psychometric chart are

1.  Vertical and uniformly spaced

2.  Horizontal and uniformly spaced

3.  Horizontal and non-uniformly spaced

4.  Inclined straight lines and non-uniformly spaced

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4
Correct Answer :

Vertical and uniformly spaced


Explanation :
No Explanation available for this question

The wet bulb temperature at 100% relative humidity as compared to dew point temperature is

1.  Same

2.  Lower

3.  Higher

4.  Unpredictable

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4
Correct Answer :

Same


Explanation :
No Explanation available for this question

The bypass factor, in case of sensible cooling of air, is given by where td1=Dry bulb temperature of air entering the cooling coil td2=Dry bulb temperature of air leaving the cooling coil td3=Dry bulb temperature of cooling coil

1.  td1-td3/td2-dd3

2.  td2-td3/td1-dd3

3.  td3-td1/td2-dd3

4.  td3-td2/td1-dd3

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4
Correct Answer :

td2-td3/td1-dd3


Explanation :
No Explanation available for this question

The bypass factor, in case of sensible heating of air, is given by Where td1=Dry bulb temperature of air entering the heating coil td2= Dry bulb temperature of air leaving the heating coil td3= Dry bulb temperature of heating coil

1.  td2-td3/td3-dd1

2.  td3-td2/td3-dd1

3.  td3-td1/td2-dd3

4.  td3-td1/td3-dd2

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4
Correct Answer :

td3-td2/td3-dd1


Explanation :
No Explanation available for this question

The dehumidification process, on the psychometric chart, is shown by

1.  Horizontal line

2.  Vertical line

3.  Inclined line

4.  Curved line

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4
Correct Answer :

Vertical line


Explanation :
No Explanation available for this question

The sensible heat factor during heating and humidification process is given by Where H1=Total heat of air entering the heating coil, H2=Total heat of air leaving the heating coil H3= Total heat of air at the end the humidification

1.  H1-H2/H3-H1

2.  H2-H1/H3-H1

3.  H3-H1/H1-H2

4.  H3-H1/H2-H1

View Answer  
4
Correct Answer :

H2-H1/H3-H1


Explanation :
No Explanation available for this question
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