Question: The efficiency of jet engine is__________________?

• 1. higher at ground
• 2. higher at high altitudes
• 3. same at all altitudes
• 4. higher at high speed

Question: For speed above 3000 km/hour, it is more advantageous to use____________________?

• 1. turbo-jet engine
• 2. ram-jet engine
• 3. propellers
• 4. rockets

Question: The compression ratio in a jet engine varies proportional to ____________________?

• 1. speed
• 2. speed
• 3. altitude
• 4. Vspeed

Question: The efficiency and work ratio of a gas turbine plant can be increased by _____________________?

• 1. using mulit-stage compressor with mfercooler
• 2. adding heat exchanger
• 3. injecting water in/around combustion chamber
• 4. all of the above

Question: Turbofan engine employs ____________________ ?

• 1. one air stream
• 2. two or more air streams
• 3. no air stream
• 4. solid fuel firing

Question: Which of the following plants is smallest and lightest for genrating a given amount of power__________________?

• 1. steam power plant
• 2. petrol engine
• 3. diesel engine’
• 4. gas turbine plant

Question: Pressure ratio in gas turbines is the ratio of ____________________?

• 1. compressor pressure ratio
• 2. highest pressure to exhaust pressure
• 3. inlet pressure to exhaust pressure
• 4. pressures across the turbine

Question: In turbo fan engine, the jet velocity as compared to turbo-jet engine is_________________?

• 1. less
• 2. more
• 3. same
• 4. may be less or more depening upon speed

Question: A simple turbo-jet engine is basically_________________?

• 1. a propeller system
• 2. gas-turbine engine equipped with a propulsive nozzle and diffuse*
• 3. chemical rocket regine
• 4. ram-jet enigne

Question: Ram-jet engine__________________?

• 1. is self-operating at zero flight speed
• 2. is not self-operating at zero^flight speed
• 3. requires no air for its operation
• 4. produces a jet consisting of plasma