ABSA 4B FINAL - EXAMINATION COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR JUST RELEASED

ABSA 4B FINAL - EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED


Question 1: A device for measuring relative humidity is called
A. a dew point tester
B. an R.H. gauge
C. an aspirating gauge
D. a psychrometer
E. a chronometer
Answer:

D


Question 2: The difference between the wet and dry bulb readings
is called the
A. wet bulb depression
B. relative humidity
C. dewpoint
D. correction factor
E. dry bulb depression
Answer:

A


Question 3: Which law describes the existence of moisture in the
air in vapour or evaporated state?
A. Newton's laws of gravity
B. 1st law of Thermodynamics
C. Dalton's Law of Partial Pressures

, D. 2nd law of Thermodynamics
E. Boyle's Ideal Gas Law
Answer:

C


Question 4: Absolute or specific humidity is
A. the actual mass of moisture present in a specific amount of air
B. the maximum mass of moisture that a specific amount of air can
hold
C. the ratio of the mass of moisture contained in a specific amount of
air to the maximum amount of moisture this specific amount of air can
contain
D. the mass of moistrue present in a specific amount of air at that
absolute temperature
E. a specific amount of air saturated with moisture
Answer:

A


Question 5: Relative humidity is
A. the actual mass of moisture present in a specific amount of air
B. the ratio of the mass of moisture contained in a specific amount of
air to the maximum amount of moisture this specific amount of air can
contain
C. the maximum mass of moisture that a specific amount of air can
contain
D. the ratio of the mass of air contained in a specific amount of
moisture to the maximum amount of air this specific amount of
moisture can contain
E. a specific amount of air saturated with moisture

,Answer:

B


Question 6: Dewpoint can be best defined as
A. the absolute temperature at which air, upon heating, will evaporate
moisture
B. the absolute temperature at which air, upon cooling, will vaporize
moisture
C. the temperature that air will begin to evaporate moisture
D. the atmospheric pressure at which air will condense moisture
E. the temperature at which air, upon cooling, becomes saturated and
will begin to condense out water vapour below this temperature
Answer:

E


Question 7: Dry-bulb temperature is
A. the absolute temperature corresponding to the atmospheric
pressure
B. the dewpoint temperature
C. not required to find the relative humidity
D. the temperature of the air measured with an ordinary thermometer
E. the same as the wet-bulb temperature if the relative humidity is
less than 100%
Answer:

D


Question 8: Wet-bulb temperature is

, A. the temperature indicated by a thermometer having its bulb
covered by a water-wetted wick or cloth and the wet bulb is exposed
to a rapidly moving stream of air
B. the same as the dry-bulb temperature if the relative humidity is less
than 100%
C. the dewpoint temperature
D. always less than the dry bulb temperature
E. not required to find the relative humidity
Answer:
A


Question 9: What is wet-bulb depression?
A. lowering of the thermometer bulb into water
B. sum of the wet-bulb temperature and the dry-bulb temperature
C. decrease in relative humidity
D. difference between the dry-bulb temperature and the wet-bulb
temperature
E. decrease in the absolute humidity
Answer:

D


Question 10: Psychrometers are
A. instruments used to determine the purity of air
B. meters used to measure air speed
C. meters used to measure the density of air
D. instruments used to measure atmospheric pressure
E. instruments used to determine the relative humidity of air
Answer: