Results
Q1. When gases pass through a convergent duct their:
Correct answer is – their velocity increases and their temperature and pressure decrease
Q2. Select the correct order of best propulsive efficiency, from low to high airspeed.
Correct answer is – Turboprop, High bypass ratio turbojet, Low bypass ratio turbojet, Pure turbojet
Q3. The highest pressure in a gas turbine engine occurs:
Correct answer is – between the compressor and the combustion chamber
Q4. In a turbofan engine, the fan speed is controlled by:
Correct answer is – the turbine
Q5. In a High Bypass Ratio engine:
Correct answer is – not all the air goes through the high pressure compressor
Q6. Modular construction:
Correct answer is – enables malfunctioning sections of the engine to be changed without changing the whole engine
Q7. The Bypass Ratio of an engine is the ratio of:
Correct answer is – cold stream air to that flowing through the hot core of the engine
Q8. The Gas Turbine Engine uses the principle of:
Correct answer is – Newton’s Third Law of motion
Q9. The addition of heat in a combustion chamber allows a:
Correct answer is – large expansion at a substantially constant pressure
Q10. In a divergent duct:
Correct answer is – the pressure temperature increases and the velocity decreases
Q11. In a twin spool engine:
Correct answer is – the LP turbine is connected to the LP compressor, the HP turbine is connected to the HP compressor
Q12. A Bypass Ratio of 5:1 means that:
Correct answer is – 5 pounds of air is bypassed for every 1 pound that goes through the hot core of the engine
Q13. Aft of the compressor:
Correct answer is – the velocity of the airflow decreases before the combustion chamber
Q14. The fan in a ducted fan engine, is driven by:
Correct answer is – the rearmost turbine
Q15. In a bypass engine, the bypass air:
Correct answer is – increases the air mass flow and therefore increases the propulsive efficiency
Q16. The majority of the thrust of a:
Correct answer is – turbofan engine comes from the bypass air
Q17. A pure turbojet engine gives:
Correct answer is – a large acceleration to a small mass of air
Q18. During the Brayton cycle, combustion takes place:
Correct answer is – continuously
