Absa 4B Power Engineering

ABSA 4B POWER ENGINEERING EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED) 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 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 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 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 E Which of the following instruments use a battery-operated fan to draw air over the thermometer bulbs? a) hydrometer b) aspirating psychrometer c) sling psychrometer d) dry psychrometer e) potentiometer Answer