2 Flashcards
The primary purpose of a supercritical wing section is to:
Increase the critical drag rise number
Coffin Corner is best described, as the situation where an aircraft is operating at such high altitude that the difference between high and low speed buffet is only a few knots. Is it affected by weight and load factors?
It is effected by aircraft weight and load factors
The term ‘Fail Passive’ of the autopilot system is used to describe:
An autopilot system comprising 2 autopilots and should one fail both will be disconnected leaving the aircraft in a passive state of trim. The aircraft must then be flown manually.
How would you describe the Diffuser in the exhaust section of a gas turbine engine:
It is a divergent duct increasing gas stream pressure and decreasing gas stream velocity
What is the purpose of the Shuttle Valve in the hydraulic system of a transport category aircraft?
To allow hydraulic pressure from the alternate system to automatically pressurise the lines in the event of a failure of the normal system
Which of the following components of a hydraulic system in a transport category aircraft acts as a surge suppressor:
The accumulator
In a pure turbojet, compared to a high by pass turbofan of the same thrust output, the rear (LP) turbine wheels are -
Smaller and rotate faster
Which of the answers listed below best represents the display of active waypoints and active routes?
Active waypoints are displayed in magenta and tracks as solid magenta lines
The freezing point of Jet-A1 fuel is closest to:
Minus 50 degrees
An aircraft flies above its mach trim speed, the mach trim system will:
Deflect the leading edge of the horizontal stabilator downwards
The effect of a centre of gravity (CoG) position on the cruise speed of an aircraft for a given thrust setting and weight in level flight is:
A rearward CoG (within limits) results in a higher cruise speed
Gas turbine engine mass air flow is governed primarily by
the RPM, the airspeed and the air density
An advantage of NICAD batteries in an aircraft installation compared to lead acid batteries is
Faster recharge cycle
The component of the autopilot system which safeguards against a servomotor runaway is
the torque limiter
The function of the follow up linkage in the nose wheel landing gear system of a jet transport category aircraft is
to hold the nose wheel steering at the correct angle
