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?

Compressed Air System (Set 2)


Multiple Choice Questions


1. In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modern low pressure air compressors?




2. Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?




3. Which of the following problems would be the probable cause for the faulty operation of a reciprocating air compressor suction valve?




4. Which of the following problems can result in below normal pressure in the intercooler of an operating low pressure air compressor?




5. If an electric motor driven air compressor fails to start, it may be due to a ____________.




6. Excessive lube oil consumption in a reciprocating air compressor is an indication of ____________.




7. If the drive belts on an air compressor were squealing, you should fix them by ____________.




8. On small, low pressure, air compressors, the cylinders are usually lubricated by the ____________.




9. The piston displacement rate of a reciprocating air compressor can be modified by changing the ____________.




10. Air compressor receivers should be "blown down" at least ____________.