23

Question 1

The function of a static inverter in the AC power system in a large jet transport aircraft is:

Answer 1

To provide 115v AC in the event of a total generator failure.

Question 2

The angle of attack required for max range cruise does not vary with gross weight. T/F

Answer 2

True

Question 3

Airflow through an expansion wave, will exhibit the following characteristics:

Answer 3

Behind the wave the air will be supersonic and will change direction.

Question 4

An internal flexible seal attached to the leading edge of a control surface is designed to:

Answer 4

Assist control load balancing.

Question 5

Specific fuel consumption increases as engine RPM approaches design RPM. T/F

Answer 5

False

Question 6

Maximum range is achieved at CL/CD max. T/F

Answer 6

False

Question 7

During a constant altitude cruise, a reduction in gross weight will require a reduction in wing angle of attack to maintain optimum lift co-efficient for subsonic cruise. T/f

Answer 7

False

Question 8

Most modern turbofan engines have two or more spools (shafts) because:

Answer 8

This allows the compressors to run closer to their ideal rpm

Question 9

The turbofan is more efficient than the turbojet because:

Answer 9

It accelerates a relatively large mass of air to a relatively low velocity

Question 10

A turbofan is not as efficient as a turboprop at low speeds. This is because the turbofan has:

Answer 10

A higher air mass accelerated to a lower velocity

Question 11

The inputs considered to be “outer loop” in an autopilot system are:

Answer 11

Altitude and heading

Question 12

The additives normally found in F35 jet fuel (Jet A-1) used in Australia is:

Answer 12

Anti-bacterial

Question 13

An APU does not directly provide:

Answer 13

Hydraulic pressure

Question 14

A desirable quality of jet fuel is:

Answer 14

Lubricant properties

Question 15

In a gas turbine engine with a free power turbine:

Answer 15

The free power turbine shaft is independent of the other engine spools