ABSA 4A| 150 Questions| Correct Solutions| Latest 2024

Lowest boiling point of water is at? a. 3000m above the sea level b. Just below sea levelc. at 1000m above sea level d. at 101.3kPa - ANSWER a. 3000m above the sea level Efficiency of an electrostatic precipitator is: a. 75% b. 60% c. 90% d. 99.9% - ANSWER d. 99% Non-Return stop valves are important in which situations a. when connected in parallel with other boilers b. when boiler trips c. if boiler ruptures d. all of the above - ANSWER d. all of the above 4th class power engineer can take charge of Power Plant as a shift Engineer: a. Up to 500 kW b. Up to 1000 kW c. Up to 5000 kW d. Up to 10000 kW - ANSWER c. Up to 5000 kW Wear on stem packing is mainly due to: a. Less tight packing b. Stem is under high temperature c. stem exposed to high corrosive material d. Rising and turning motion of the valve stem - ANSWER d. Rising and turning motion of the valve stem The following is true of a gate valve: a. has less restriction in a line than a globe valve, is used to throttle flow b. has less restriction in a line than a globe valve, should be operated fully open or fully closed c. is used to throttle flow, is used for different applications than a globe valve d. should be operated fully open or fully closed, has more restriction in a line than a globe valve - ANSWER b. has less restriction in a line than a globe valve, should be operated fully open or fully closed