INSTRUMENTS SPECIMEN QUESTIONS Flashcards

1
Q
  1. A modern Radio Altimeter uses the frequency band:
A

b. SHF 3000 Mhz - 30 Ghz

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2
Q
  1. An aircraft that is assessed as not being a threat would be indicated on a TCAS system as:
A

c. a hollow white or cyan diamond

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3
Q
  1. During descent through a block of airspace of constant temperature and while flying at a constant mach no will cause the CAS to:
A

a. increase

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4
Q
  1. The true altitude of an aircraft in flight is shown from:
A

b. pressure altitude

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5
Q
  1. On a Turn and Slip indicator, needle to the left and ball to the right indicates:
A

left turn too much bank

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6
Q
  1. What is Density Altitude?
A

the altitude in the International Standard Atmosphere at which the prevailing density would be found

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7
Q
  1. A Radio Altimeter is:
A

d. aircraft based and measures true height

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8
Q
  1. 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

a. i ii iii v

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9
Q
  1. An aircraft is travelling at 120 kt, what angle of bank would be required for a rate one turn?
A

c. 19°

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10
Q
  1. An aircraft is travelling at 100 kt forward speed on a 3° glideslope. What is its rate of descent?
A

a. 500 ft/min

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11
Q
  1. What correction is given by TCAS?
A

b. climb or descend

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12
Q
  1. 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

a. under - read

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13
Q
  1. 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

a. nose up, bank right

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14
Q
  1. The needle and ball of a Turn Indicator are both to the left of the datum. This indicates:
A

a. a left turn with too much bank

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15
Q
  1. Under conditions determined by the International Standard Atmosphere, at MSL True Air Speed is:
A

c. equals CAS

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16
Q
  1. In what range is GPWS operative?
A

c. 2450 - 50 ft

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17
Q
  1. 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
A

i ii iii v

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18
Q
  1. What is another name for fail active?
A

fail operational

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19
Q
  1. Why must an autopilot be synchronised when you wish to disconnect?
A

c. to secure against abrupt changes in aircraft attitude

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20
Q
  1. What is used for EGT measurement?
A

d. thermo emf thermocouples

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21
Q
  1. When accelerating on a northerly heading what does the Direct Reading Magnetic Compass indicate?
A

b. north

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22
Q
  1. 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
A

b. i ii

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23
Q
  1. What does the white arc on a temperature scale indicate?
A

c. normal operating temperature

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24
Q
  1. The rate of turn indicator is a very useful gyroscopic instrument. When used in conjunction with the Attitude Indicator it provides:
A

b. rate of turn about the yaw axis

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25
Q
  1. With the aircraft weight constant but variations in airfield altitude, take-off will always be at a constant:
A

b. calibrated airspeed

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26
Q
  1. An inertial reference system is aligned when turned on so as to:
A

a. calculate the computed trihedron with reference to the earth

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27
Q
  1. Total Air Temperature is _ _ _ _ _ _ than static air temperature and the difference varies with _ ___ __?
A

c. warmer CAS

28
Q
  1. True heading can be converted into magnetic heading using a compass and:
A

a. a map with isogonal lines

29
Q
  1. An aircraft flies into a colder airmass. This will cause the altimeter to:
A

a. over-read

30
Q
  1. A gravity-erecting device is utilised in:
A

a. an artificial horizon

31
Q
  1. The rigidity of a gyroscope can be improved by:
A

a. increasing the angular momentum and concentrating the mass on the periphery of the rotor

32
Q
  1. The outputs of a flux valve are initially sent to:
A

b. an error detector

33
Q
  1. The period of validity of an FMS data base is:
A

c. 28 days

34
Q
  1. An IRS differs from an INS in that it:
A

b. has a shorter spin-up time and suffers from laser lock.

35
Q
  1. In a solid state gyroscope the purpose of the dither motor is to:
A

b. overcome laser lock

36
Q
  1. In an IRS:
A

d. accelerometers and gyros are both strapped down

37
Q
  1. 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
A

c. i iii v

38
Q
  1. A blockage occurs in the ram air source and the drain-hole. The ASI in a non-pressurised aircraft will:
A

c. act like an altimeter

39
Q
  1. 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
A

d. i ii iii v

40
Q
  1. 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
A

b. i iii

41
Q
  1. Rate of turn is affected by:
    i. aircraft speed
    ii. angle of bank
    iii. aircraft weight
A

a. i ii

42
Q
  1. The ability of a gyroscope to indicate aircraft heading is based on it having:
A

a. one degree of freedom in the vertical axis

43
Q
  1. A Vmo/Mmo alerting system contains a barometric aneroid capsule:
A

d. which is subjected to static pressure and an airspeed capsule which is subjected to
dynamic pressure

44
Q

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

A

b. iii ii i

45
Q

Sound is propagated at a velocity which is dependent upon:

A

d. temperature

46
Q

The local speed of sound at mean sea level at ISA -10°C is:

A

b. 650 kt

47
Q

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?

A

b. 244°

48
Q

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:

A

c. TAS, 481 kt, Mach 0·855

49
Q

An aircraft in the northern hemisphere lands and decelerates on a westerly heading. The compass will indicate:

A

d. a turn south

50
Q

A compass swing is used to:

A

a. align compass north with magnetic north

51
Q
  1. The angle formed between the directive force and the total magnetic force is called:
A

dip

52
Q
  1. What is the speed of sound at 30,000 ft and -40°C?
A

595 kt

53
Q
  1. If a constant CAS is maintained under normal conditions in the climb what happens to the Mach No?
A

d. it will increase

54
Q
  1. 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
A

c. ii v

55
Q
  1. The output of a double integration N/S is:
A

c. distance

56
Q
  1. A solid state gyro is:
A

b. a rate sensor

57
Q
  1. The magnetic heading reference unit has a precession rate of:
A

b. 2°/min

58
Q
  1. If the TAS at 40,000 ft is 450 kt the Mach No is:
A

b. 0·783

59
Q
  1. The EADI and the EHSI of an EFIS installation are also referred to by the manufacturers as:
A

a. primary display and navigation display respectively

60
Q
  1. 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
A

c. ii iii vi viii ix

61
Q
  1. Wind information can be displayed in an EFIS system in which of the following modes?
A

c. full nav, full ILS, map, centre map

62
Q
  1. On an EADI radio altitude is displayed:
A

c. digitally between 2500 ft and 1000 ft and thereafter as an analogue/digital display

63
Q
  1. In FMS fitted aircraft the main interface between pilot and system will be provided by:
A

b. the multi-purpose control and display unit

64
Q
  1. In the ILS mode, one dot on the lateral deviation scale on the EHSI indicates:
A

c. 1°

65
Q
  1. On a standard 2-dot EHSI in the en-route mode each dot represents:
A

b. 2 nm

66
Q
  1. 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:
A

b. +30 ft