2B1 Attempt 1 (Power Engineering) Exam 2025 Questions and Answers

2B1 Attempt 1 (Power Engineering)
Exam 2025 Questions and Answers


Question 1




When a H-P reaction turbine is run up what is used to control the very fine clearances between fixed

and moving blades?




Select one:

a. dummy pistons

b. thrust adjusting gear

c. labyrinth seals

d. end tightening


e. variable lubrication oil flow to thrust bearings - CORRECT ANSWER✔️✔️-The correct answer

is: thrust adjusting gear

Question 2




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,For high temperature blades on large steam turbines to achieve the required strength and oxidation-

erosion resistance what material is used?




Select one:

a. carbon steel

b. alloyed chrome steel

c. modified stainless steel

d. leaded nickel-brass


e. mechanite - CORRECT ANSWER✔️✔️-The correct answer is: alloyed chrome steel


Question 3




Dual fuel compression ignition engines, operate by:




Select one:

a. drawing in a mixture of gas and air and injecting of fuel after compression

b. compressing the air and injecting the gas and oil

c. starting on fuel oil and then switching to gas

d. combusting waste gases available in plants




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,e. maintaining a rich fuel ratio - CORRECT ANSWER✔️✔️-The correct answer is: drawing in a

mixture of gas and air and injecting of fuel after compression

Question 4




Poor combustion in an internal combustion engine may be attributed to:




Select one:

a. subnormal compression temperature

b. subnormal water jacket temperature

c. light loads

d. all of the above


e. none of the above - CORRECT ANSWER✔️✔️-The correct answer is: all of the above


Question 5




Double flow steam turbine arrangements:




Select one:

a. are the preferred arrangement which system requires the turbine rpm to be over 7200 rpm

b. require less maintenance then any other turbine arrangement of similar output


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, c. are turbines in which steam flow is split, flows in two directions, thus canceling axial thrust

d. allow velocity compounding and therefore maximum extraction of energy from the steam


e. are pure reaction turbines - CORRECT ANSWER✔️✔️-The correct answer is: are turbines in

which steam flow is split, flows in two directions, thus canceling axial thrust

Question 6




Which maintenance activity would include inspection of the fuel nozzles for erosion of tip holes and

plugging?

Select one:

a. Combustion inspection

b. Borescoping

c. Hot gas path inspection

d. Major inspection


e. Minor inspection. - CORRECT ANSWER✔️✔️-The correct answer is: Combustion inspection


Question 7




To accommodate the increase in volume of the steam as it passes through a turbine, the:




Select one:


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