6

Question 1

A function of a pressure relieve valve in a transport category jet hydraulic system is:

Answer 1

To prevent hydraulic seals from blowing out

Question 2

The function of the rear turbine support struts in the exhaust system of a turbojet engine is:

Answer 2

To straighten the airflow in the jet pipe

Question 3

In a gas turbine engine the start bleed valve is open at idle RPM. The RPM is then increased to maximum with the bleed valve still open.
Regarding this situation:

Answer 3

The EGT will be higher than normal with reduced thrust output

Question 4

In the turbine of an air cycle machine, bleed air supplied from engines undergoes (px & temp)

Answer 4

a decrease in pressure and a decrease in temperature

Question 5

A constant supply of fluid from the reservoir in a jet aircraft hydraulic system is ensured by:

Answer 5

Pressurising the reservoir with bleed air

Question 6

When an aircraft is climbed or descended using the Flight Level Change function of the auto flight system, with regard to the thrust settings used

Answer 6

on climb, thrust is automatically set to max climb thrust and on descent, the throttles are automatically retarded to idle thrust

Question 7

In a gas turbine powered aircraft, less thrust is available for take off with: (alt)

Answer 7

High density altitude

Question 8

In high speed flight, aileron effectiveness may be reduced because of shock wave formation near the ailerons or wing twisting by using?

Answer 8

spoilers to assist roll control

Question 9

The purpose of a divergent shaped inlet duct on a turbofan engine is to:

Answer 9

Increase static pressure at the engine inlet

Question 10

The by-pass ratio of a gas turbine engine is best described as:

Answer 10

The ratio of by-pass air to core air

Question 11

The electrical connection of ground AC power to the electrical system of a jet transport aircraft may be prevented when:

Answer 11

The aircraft generators are powering the electrical system

Question 12

When a generator field relay (generator field switch) is tripped in a jet aircraft electrical system:

Answer 12

The voltage regulator is disconnected from the excitation field

Question 13

The source of field excitation current for a 3 phase alternator in a jet transport aircraft electrical system is:

Answer 13

The permanent magnet generator (PMG)

Question 14

In a constant frequency generator electrical system, the voltage regulator function is:

Answer 14

To control the current of the main exciter

Question 15

The main function of the reduction drive in a turbo-prop installation is:

Answer 15

To convert high engine RPM to the low RPM required by the propeller

Question 16

An advantage of the use of Alternating Current (AC) in a large aircraft electrical system is high voltage transmission.
This permits:

Answer 16

Lower current levels

Question 17

Regarding the influence of ram effect on gas turbine engine thrust output:

Answer 17

Ram effect results in a total recovery of thrust as aircraft forwards speed increases

Question 18

Stalling speed is relatively higher for an aircraft with wing sweep. This is because of the effective (span wise/chordwise)

Answer 18

decrease in chordwise airflow

Question 19

An advantage of constant frequency alternators in a jet transport aircraft electrical system is:

Answer 19

They are capable of load sharing

Question 20

If a pilot selects maximum auto-brakes for a landing and then subsequently applies brakes manually during the landing roll:

Answer 20

The auto-brakes will disarm

Question 21

When flying on a long range cruise schedule, as jet aircraft gross weight reduces in cruise level flight as fuel is consumed, the long range cruse (LRC) mach number will:

Answer 21

Reduce at a reduced power setting

Question 22

The secondary flight control which enhances lateral control is:

Answer 22

Spoilers

Question 23

Spiral divergence (spiral instability) is increased when

Answer 23

Lateral stability is weak and directional stability is strong

Question 24

Vortex generators fitted to the horizontal stabiliser of a jet transport aircraft are used to:

Answer 24

Reduce flow separation at high speeds

Question 25

In a B767 aircraft equipped with a flight management system incorporating electronic flight instruments with two electronic attitude direction indicators (EADIs) and two horizontal situation indicators (EHSIs), the number of symbol generators (SGs) fitted is:

Answer 25

3

Question 26

The cabin pressurisation control system in a jet transport aircraft typically operates in two ranges.
They are:

Answer 26

The isobaric and differential ranges

Question 27

Autopilot systems require protection against malfunctions such as control runaways. The item which is not an example of an autopilot protection system is:

a. The torque limiter
b. Rate damping
c. Model following
d. Feedback comparators
e. Cross-coupled feedback

Answer 27

Rate damping