INSTRUMENTS SPECIMEN QUESTIONS Flashcards
- A modern Radio Altimeter uses the frequency band:
b. SHF 3000 Mhz - 30 Ghz
- An aircraft that is assessed as not being a threat would be indicated on a TCAS system as:
c. a hollow white or cyan diamond
- During descent through a block of airspace of constant temperature and while flying at a constant mach no will cause the CAS to:
a. increase
- The true altitude of an aircraft in flight is shown from:
b. pressure altitude
- On a Turn and Slip indicator, needle to the left and ball to the right indicates:
left turn too much bank
- What is Density Altitude?
the altitude in the International Standard Atmosphere at which the prevailing density would be found
- A Radio Altimeter is:
d. aircraft based and measures true height
- Which of the following are modes of the GPWS?
i. excessive sink rate
ii. altitude loss after take-off or go-around
iii. excessive glideslope deviation
iv. high climb rate
v. flaps in the incorrect position
vi. high altitude descent
vii. stall
a. i ii iii v
- An aircraft is travelling at 120 kt, what angle of bank would be required for a rate one turn?
c. 19°
- An aircraft is travelling at 100 kt forward speed on a 3° glideslope. What is its rate of descent?
a. 500 ft/min
- What correction is given by TCAS?
b. climb or descend
- If the Total Pressure sensor supply line leaks, and with the drain element blocked, in a non- pressurised aircraft this will cause the ASI to:
a. under - read
- Using a Classic Attitude Indicator, an aircraft performs a turn through 270° at a constant angle of bank and rate of turn. The indication is:
a. nose up, bank right
- The needle and ball of a Turn Indicator are both to the left of the datum. This indicates:
a. a left turn with too much bank
- Under conditions determined by the International Standard Atmosphere, at MSL True Air Speed is:
c. equals CAS
- In what range is GPWS operative?
c. 2450 - 50 ft
- Which of the following are inputs to the central processing unit of the GPWS?
i. flaps
ii. landing gear
iii. glideslope
iv. unusual attitudes
v. radio altimeter
vi. VOR
i ii iii v
- What is another name for fail active?
fail operational
- Why must an autopilot be synchronised when you wish to disconnect?
c. to secure against abrupt changes in aircraft attitude
- What is used for EGT measurement?
d. thermo emf thermocouples
- When accelerating on a northerly heading what does the Direct Reading Magnetic Compass indicate?
b. north
- Why is there a vibration device in a pressure altimeter?
i. to prevent hysteresis
ii. to prevent lag in a mechanical system
iii. to keep pilots happy during long flights
iv. to prevent icing
v. to overcome dither
b. i ii
- What does the white arc on a temperature scale indicate?
c. normal operating temperature
- The rate of turn indicator is a very useful gyroscopic instrument. When used in conjunction with the Attitude Indicator it provides:
b. rate of turn about the yaw axis
- With the aircraft weight constant but variations in airfield altitude, take-off will always be at a constant:
b. calibrated airspeed
- An inertial reference system is aligned when turned on so as to:
a. calculate the computed trihedron with reference to the earth
- Total Air Temperature is _ _ _ _ _ _ than static air temperature and the difference varies with _ ___ __?
c. warmer CAS
- True heading can be converted into magnetic heading using a compass and:
a. a map with isogonal lines
- An aircraft flies into a colder airmass. This will cause the altimeter to:
a. over-read
- A gravity-erecting device is utilised in:
a. an artificial horizon
- The rigidity of a gyroscope can be improved by:
a. increasing the angular momentum and concentrating the mass on the periphery of the rotor
- The outputs of a flux valve are initially sent to:
b. an error detector
- The period of validity of an FMS data base is:
c. 28 days
- An IRS differs from an INS in that it:
b. has a shorter spin-up time and suffers from laser lock.
- In a solid state gyroscope the purpose of the dither motor is to:
b. overcome laser lock
- In an IRS:
d. accelerometers and gyros are both strapped down
- Which of the following correctly describes the gyroscope of a Rate of Turn Indicator?
i. 1 degree of freedom
ii. 2 degrees of freedom
iii. its frame is held by two springs
iv. its spin axis is parallel to the pitch axis
v. the spin axis is parallel to the yaw axis
vi. the spin axis is horizontal
c. i iii v
- A blockage occurs in the ram air source and the drain-hole. The ASI in a non-pressurised aircraft will:
c. act like an altimeter
- The errors associated with the Directional Indicator are:
i. earth rate
ii. transport wander
iii. banking when pitched up
iv. annual movement of the poles
v. mechanical problems
d. i ii iii v
- A rate integrating gyroscope is used in:
i. inertial attitude system
ii. automatic flight control systems
iii. inertial navigation systems
iv. rate of turn indicators
b. i iii
- Rate of turn is affected by:
i. aircraft speed
ii. angle of bank
iii. aircraft weight
a. i ii
- The ability of a gyroscope to indicate aircraft heading is based on it having:
a. one degree of freedom in the vertical axis
- A Vmo/Mmo alerting system contains a barometric aneroid capsule:
d. which is subjected to static pressure and an airspeed capsule which is subjected to
dynamic pressure
When measuring different pressures (low/med/high) which of the following has the three types of sensing devices in ascending order of pressure measurement?
i. bourdon tube
ii. bellows type
iii. aneroid capsule
b. iii ii i
Sound is propagated at a velocity which is dependent upon:
d. temperature
The local speed of sound at mean sea level at ISA -10°C is:
b. 650 kt
What would the compass heading be given a true heading of 247° in an area where the variation is 8°W and a compass deviation of 11°E?
b. 244°
An aircraft is flying at flight level 350 at a CAS of 290 kt and a temperature deviation of ISA -10°C. The TAS and MN will be:
c. TAS, 481 kt, Mach 0·855
An aircraft in the northern hemisphere lands and decelerates on a westerly heading. The compass will indicate:
d. a turn south
A compass swing is used to:
a. align compass north with magnetic north
- The angle formed between the directive force and the total magnetic force is called:
dip
- What is the speed of sound at 30,000 ft and -40°C?
595 kt
- If a constant CAS is maintained under normal conditions in the climb what happens to the Mach No?
d. it will increase
- Regarding magnetism; which of the following statements is correct?
i. lines of flux run from blue pole to red pole
ii. like poles repel
iii. unlike poles repel
iv. like poles attract
v. unlike poles attract
c. ii v
- The output of a double integration N/S is:
c. distance
- A solid state gyro is:
b. a rate sensor
- The magnetic heading reference unit has a precession rate of:
b. 2°/min
- If the TAS at 40,000 ft is 450 kt the Mach No is:
b. 0·783
- The EADI and the EHSI of an EFIS installation are also referred to by the manufacturers as:
a. primary display and navigation display respectively
- In which of the following modes may information from the AWR be displayed?
i. plan
ii. expanded ILS
iii. map
iv. full nav
v. full ILS
vi. expanded nav
vii. full VOR
viii. expanded VOR
ix. centre map
c. ii iii vi viii ix
- Wind information can be displayed in an EFIS system in which of the following modes?
c. full nav, full ILS, map, centre map
- On an EADI radio altitude is displayed:
c. digitally between 2500 ft and 1000 ft and thereafter as an analogue/digital display
- In FMS fitted aircraft the main interface between pilot and system will be provided by:
b. the multi-purpose control and display unit
- In the ILS mode, one dot on the lateral deviation scale on the EHSI indicates:
c. 1°
- On a standard 2-dot EHSI in the en-route mode each dot represents:
b. 2 nm
- Given the following information calculate the instrument error of a pre-flight altimeter check:
i. aerodrome elevation:
ii. apron elevation:
iii. height of altimeter above apron:
iv. altimeter reading with QFE set:
b. +30 ft
