1. What will be the power if the PLAN for both 2-stroke and 4-stroke engine is same?
2. What is the indicator diagram?
3. What are the purpose of taking indicator diagram?
4. What are the types of indicator diagram?
5. What is indicated power? How to calculate power?
6. Steps to take indicator diagram?
7. Purpose of Power diagram, Out-of-phase diagram, Compression diagram, Light spring diagram?
8. When indicator diagram is taken?
9. What are the necessary precaution to avoid indicator malfunction?
10. What are the steps to be taken when compression pressure is low?

Marine Control System & Instrumentation (Set 1)

Multiple Choice Questions

1. The controller set point of an automatic control system is 65°C. The valve closes when the output temperature reaches 70°C, and reopens when the temperature falls below 60°C. The type of positioning action in this controller is known as ____________.

2. In a pneumatic automation system, a unit producing a signal to govern the position of the controller of the measured variable, relative to the value of the measured variable, is said to have ____________.

3. If the loading air pressure for a diaphragm controlled valve drops below the designed operating pressure, the valve will ____________.

4. Every automated machinery plant must have an "engineer's assistance" alarm. Power for this alarm should be taken from the ____________.

5. The effect of "reset", when added to a proportional controller is to ____________.

6. Which of the following statements expresses the function of proportional-plus-reset action?

7. One disadvantage of proportional-position action is that ____________.

8. Filters are installed ahead of air line lubricators for the primary purpose of removing ____________.

9. The cylinder unloading mechanism used on low pressure air compressors is an example of which mode of control?

10. Which of the listed devices would be installed at a control system air pressure reducing station?