Psychrometrics II - MCQs with Answers

Psychrometrics II - MCQs with Answers

Q1. What is the temperature at which the water vapour in the mixture of water vapour in air, starts condensing called?

a. condensation temperature
b. dew point temperature
c. vaporization temperature
d. all of the above

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Q2. The temperature of air recorded by thermometer when the bulb is covered by a cotton wick saturated by water is called as

a. dry bulb temperature
b. wet bulb temperature
c. stream temperature
d. psychrometric temperature

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Q3. Which temperature can be measured by an instrument called psychrometer?

a. dry bulb temperature
b. wet bulb temperature
c. both a. and b.
d. none of the above

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Q4. When dry bulb temperature (DBT) and wet bulb temperature (WBT) are measured, greater the difference between DBT and WBT,

a. greater the amount of water vapour held in the mixture
b. smaller the amount of water vapour held in the mixture
c. same the amount of water vapour held in the mixture
d. none of the above

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Q5. What is sensible cooling of air?

a. the cooling in which sensible heat of air is removed in order to reduce temperature
b. the cooling in which temperature of air is reduced without changing in its moisture content
c. both a. and b.
d. none of the above

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Q6. When the humidity ratio of air increases the the air is said to be

a. dehumidified
b. humidified
c. heated
d. cooled

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Q7. The temperature at which the air cannot hold all the water vapour mixed in it and some vapour starts condensing is called as

a. humidification temperature
b. dehumidification temperature
c. dew point temperature
d. none of the above
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Q8. The formation of fog starts when,

a. air temperature is equal to the dew point temperature
b. air temperature is greater than the dew point temperature
c. both a. and b.
d. none of the above

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Q9. When the dew point temperature is equal to the air temperature then the relative humidity is

a. 0%
b. 50%
c. 100%
d. unpredictable

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Q10. On psychrometric chart, wet bulb temperature lines are

a. horizontal with uniformly spaced
b. horizontal with non-uniformly spaced
c. inclined with uniformly spaced
d. inclined with non-uniformly spaced

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