Discussion
Consider the following instrument and quantity pairs:
Tachometer - Rotor speed as a percentage of a datum
Engine pressure ratio - Turbine discharge over compressor inlet pressure
Torquemeter - Shaft torque on a turboprop
Manifold pressure gauge - Pressure difference across the throttle
How many of the pairs given above are correctly matched?
Answer: D
Correct answer: Only three
The first three pairs are correct. A tachometer indicates rotor speed as a percentage of a datum; engine pressure ratio is turbine discharge over compressor inlet pressure; and a torquemeter measures shaft torque on a turboprop.
The fourth is wrong. A manifold pressure gauge reads the absolute pressure in the induction manifold, referenced to vacuum, not a difference across the throttle. That is why it indicates ambient pressure with the engine stopped, which a differential instrument would not.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development