Power Engineering 4th Class unit B 10 chapter 1 Exam 2025 Questions and Answers

Power Engineering 4th Class unit B 10
chapter 1 Exam 2025 Questions and
Answers


The relative humidity is plotted on a psychrometric chart along:

Choose one answer.

a. The Lines curving upwards from the lower left to the upper right side of the chart

b. The Horizontal axis on the bottom of the chart

c. Vertical lines, and read along the horizontal scale at the bottom of the chart

d. The Saturation line and plotted along the horizontal lines


e. Horizontal lines and read along the left side scale - CORRECT ANSWER✔️✔️-a


The specific volume of air is expressed as the volume of:

Choose one answer.

a. 1 kg of air at 101.325 kPa in cm3

b. 0.833 kg of air at standard pressure and temperature in m3

c. 1 kg of air at 101.325 kPa and 21 degrees Celsius in m3


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, d. 1 g of air occupied at any temperature and pressure


e. 1 kg of air, regardless of temperature and pressure - CORRECT ANSWER✔️✔️-c


The volume of standard air is _____ m3/kg of dry air.

Choose one answer.

a. 0.533

b. 0.633

c. 0.733

d. 0.833


e. 0.933 - CORRECT ANSWER✔️✔️-d


The wet-bulb temperature is plotted on a psychrometric chart on the:

Choose one answer.

a. Right vertical axis

b. Left vertical axis

c. Lines which originate at the saturation line and slope downward to the right

d. Horizontal axis on the bottom of the chart


e. Relative humidity lines - CORRECT ANSWER✔️✔️-c


The dew point is the:

Choose one answer.




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