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Machine Dynamics Practice Test: Steam Engine Valves and Reversing Gears
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The valve gear of a steam engine is a mechanism that controls the inlet and exhaust valves. It also serves as a reversing gear. 

The reversing gear controls the direction of the engine's travel, and adjusts the timing of the slide valves. It also controls when and how long the intake- and exhaust-ports of the cylinders are open. 
A slide valve engine has a constant direction of pressure. It's only reversed by changing the valve position relative to the crank shaft. 

Machine Dynamics Practice Test: Steam Engine Valves and Reversing Gears
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19 Questions

1. The function of a reversing gear in a steam engine is
2. In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called
3. The function of a reversing gear in a steam engine is
4. 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
5. The distance moved by the valve from one end to the other end is called valve travel.
6. 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.
7. 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
8. The piston slide valve is an inside admission valve.
9. In Meyer’s expansion valve, the expansion valve is driven by an eccentric having an angle of advance from
10. Which of the following statement is correct?
11. The throw of the eccentric is equal of the valve travel.
12. A flywheel is used to control the mean speed of an engine caused by the variations in load.
13. The displacement of the D-slide valve is ______________ the steam lap by a distance known as lead of the valve.
14. A flywheel is used to control the mean speed of an engine caused by the variations in load.
15. In Meyer’s expansion valve, the main valve is driven by an eccentric having and angle of advance from
16. 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
17. The distance by which the _____________ of the D-slide valve overlaps the steam port is called exhaust lap.
18. 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
19. In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

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