Applied Thermodynamics (3161910) MCQs

MCQs of Psychrometry

Showing 11 to 20 out of 60 Questions
11.
The by-pass factor of a cooling coil decreases with
(a) decrease in fin spacing and increase in number of rows
(b) increase in fin spacing and increase in number of rows
(c) increase in fin spacing and decrease in number of rows
(d) decrease in fin spacing and decrease in number of rows
Answer:

Option (a)

12.
The wet-bulb depression is zero when relative humidity is
(a) 0%
(b) 50%
(c) 75%
(d) 100%
Answer:

Option (d)

13.
In a saturated air-water vapour mixture, the
(a) dry bulb temperature is higher than wet bulb temperature
(b) dew point temperature is lower than wet bulb temperature
(c) dry bulb, wet bulb and dew point temperature are same
(d) dry bulb temperature is higher than dew point temperature
Answer:

Option (c)

14.
The dry bulb temperature lines on the psychrometric chart are
(a) vertical and uniformly spaced
(b) horizontal and uniformly spaced
(c) horizontal and non-uniformly spaced
(d) curved lines
Answer:

Option (a)

15.
In a psychrometric chart, specific humidity (moisture content) lines are
(a) vertical and uniformly spaced
(b) horizontal and uniformly spaced
(c) horizontal and non-uniformly spaced
(d) curved lines
Answer:

Option (b)

16.
A low wet bulb temperature indicates very __________ humidity.
(a) low
(b) high
(c) can’t predict
(d) 100%
Answer:

Option (a)

17.
In chemical dehumidification process
(a) dew point temperature decreases
(b) wet bulb temperature decreases
(c) dry bulb temperature increases
(d) all of these
Answer:

Option (d)

18.
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called
(a) dry air
(b) moist air
(c) saturated air
(d) specific humidity
Answer:

Option (c)

19.
The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called
(a) Kinetic theory of gases
(b) Newton's law of gases
(c) Dalton's law of partial pressures
(d) Avogadro's hypothesis
Answer:

Option (c)

20.
The instrument used to measure relative humidity of air is
(a) hygrometer
(b) hydrometer
(c) pyrometer
(d) anemometer
Answer:

Option (a)

Showing 11 to 20 out of 60 Questions