Explore topic-wise MCQs in Machine Dynamics.

This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Dynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?

A. D-slide valve
B. Governor
C. Flywheel
D. Meyer’s expansion valve
Answer» D. Meyer’s expansion valve
Discussion
2.

A flywheel is used to control the mean speed of an engine caused by the variations in load.

A. True
B. False
Answer» C.
Discussion
3.

In Meyer’s expansion valve, the expansion valve is driven by an eccentric having an angle of advance from

A. 500-600
B. 600-700
C. 700-80
D. 800-900
Answer» E.
Discussion
4.

The virtue or equivalent eccentric for the Meyer’s expansion valve is defined as an eccentric having such a length and angle of advance that will cause cut-off to take place at the same position, as is caused by the combined effect of main eccentric and expansion eccentric.

A. True
B. False
Answer» B. False
Discussion
5.

In Meyer’s expansion valve, the main valve is driven by an eccentric having and angle of advance from

A. 100-150
B. 150-250
C. 250-300
D. 300-400
Answer» D. 300-400
Discussion
6.

WHICH_OF_THE_FOLLOWING_IS_USED_TO_CONTROL_THE_SPEED_VARIATIONS_OF_THE_ENGINE_CAUSED_BY_THE_FLUCTUATIONS_OF_THE_ENGINE_TURNING_MOMENT??$

A. D-slide valve
B. Governor
C. Flywheel
D. Meyer’s expansion valve
Answer» D. Meyer‚Äö√Ñ√∂‚àö√ë‚àö¬•s expansion valve
Discussion
7.

A flywheel is used to control the mean speed of an engine caused by the variations in load?

A. True
B. False
Answer» C.
Discussion
8.

When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

A. D-slide valve
B. governor
C. Meyer’s expansion valve
D. flywheel
Answer» C. Meyer‚Äö√Ñ√∂‚àö√ë‚àö¬•s expansion valve
Discussion
9.

The function of a reversing gear in a steam engine is

A. to control the supply of steam
B. to alter the point of cut-off while the engine is running
C. to reverse the direction of motion of the crank shaft
D. both b and c
Answer» E.
Discussion
10.

In Meyer’s expansion valve, the expansion valve is driven by an eccentric having an angle of advance from$

A. 50<sub>0</sub>-60<sub>0</sub>
B. 60<sub>0</sub>-70<sub>0</sub>
C. 70<sub>0</sub>-8<sub>0</sub>
D. 80<sub>0</sub>-90<sub>0</sub>
Answer» E.
Discussion
11.

The virtue or equivalent eccentric for the Meyer’s expansion valve is defined as an eccentric having such a length and angle of advance that will cause cut-off to take place at the same position, as is caused by the combined effect of main eccentric and expansion eccentric.$

A. True
B. False
Answer» B. False
Discussion
12.

In Meyer’s expansion valve, the main valve is driven by an eccentric having and angle of advance from$

A. 10<sub>0</sub>-15<sub>0</sub>
B. 15<sub>0</sub>-25<sub>0</sub>
C. 25<sub>0</sub>-30<sub>0</sub>
D. 30<sub>0</sub>-40<sub>0</sub>
Answer» D. 30<sub>0</sub>-40<sub>0</sub>
Discussion
13.

In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the steam lap and the angle of the eccentric but keeping constant the travel and lead of the valve. This method will

A. cause withdrawing or throttling of steam
B. reduce length of effective stroke of piston
C. reduce maximum opening opening of port to steam
D. all of the mentioned
Answer» D. all of the mentioned
Discussion
14.

In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve may be obtained by increasing the angle of advance of the eccentric but reducing the throw of the eccentric and keeping the steam lap and exhaust lap constant. The method will cause withdrawing or throttling of steam.

A. True
B. False
Answer» B. False
Discussion