Power Engineering 4th Class unit B 7 chapter 2 Exam 2025 Questions and Answers

Power Engineering 4th Class unit B 7
chapter 2 Exam 2025 Questions and
Answers


Impulse turbines:

Choose one answer.

a. are only used with low pressure steam

b. require large thrust bearings

c. were invented by Parsons

d. have large pressure drops across the huckets


e. have blades with the same steam inlet and outlet angles - CORRECT ANSWER✔️✔️-e


Shaft sealing carbon glands are:

Choose one answer.

a. Lubricated by the main oil pump

b. Limited to a temperature of 250°C

c. Replaced monthly due to erosion


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, d. Self-lubricating


e. Sprayed with Monel - CORRECT ANSWER✔️✔️-d


Two of the more important methods of classifying a steam turbine are by the stationary steam

passages and the:

Choose one answer.

a. Casing passages

b. Exhaust passages

c. Rotor passages

d. Inlet passages


e. Oil passages - CORRECT ANSWER✔️✔️-c


In an impulse turbine, the:

Choose one answer.

a. Steam flow is reduced through the nozzles

b. Steam pressure is reduced in the nozzles

c. Steam pressure decreases across the rotating blades

d. Steam velocity is increased through the rotating blades


e. Exhaust steam re-enters the same row of blades - CORRECT ANSWER✔️✔️-b


A turbine overspeed trip:




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