INSTRUMENTS SPECIMEN QUESTIONS

Question 1

1. A modern Radio Altimeter uses the frequency band:

Answer 1

b. SHF 3000 Mhz - 30 Ghz

Question 2

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

Answer 2

c. a hollow white or cyan diamond

Question 3

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

Answer 3

a. increase

Question 4

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

Answer 4

b. pressure altitude

Question 5

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

Answer 5

left turn too much bank

Question 6

6. What is Density Altitude?

Answer 6

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

Question 7

7. A Radio Altimeter is:

Answer 7

d. aircraft based and measures true height

Question 8

8. 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

Answer 8

a. i ii iii v

Question 9

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

Answer 9

c. 19°

Question 10

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

Answer 10

a. 500 ft/min

Question 11

11. What correction is given by TCAS?

Answer 11

b. climb or descend

Question 12

12. 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:

Answer 12

a. under - read

Question 13

13. 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:

Answer 13

a. nose up, bank right

Question 14

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

Answer 14

a. a left turn with too much bank

Question 15

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

Answer 15

c. equals CAS

Question 16

16. In what range is GPWS operative?

Answer 16

c. 2450 - 50 ft

Question 17

17. 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

Answer 17

i ii iii v

Question 18

18. What is another name for fail active?

Answer 18

fail operational

Question 19

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

Answer 19

c. to secure against abrupt changes in aircraft attitude

Question 20

20. What is used for EGT measurement?

Answer 20

d. thermo emf thermocouples

Question 21

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

Answer 21

b. north

Question 22

22. 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

Answer 22

b. i ii

Question 23

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

Answer 23

c. normal operating temperature

Question 24

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

Answer 24

b. rate of turn about the yaw axis

Question 25

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

Answer 25

b. calibrated airspeed

Question 26

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

Answer 26

a. calculate the computed trihedron with reference to the earth

Question 27

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

Answer 27

c. warmer CAS

Question 28

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

Answer 28

a. a map with isogonal lines

Question 29

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

Answer 29

a. over-read

Question 30

30. A gravity-erecting device is utilised in:

Answer 30

a. an artificial horizon

Question 31

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

Answer 31

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

Question 32

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

Answer 32

b. an error detector

Question 33

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

Answer 33

c. 28 days

Question 34

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

Answer 34

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

Question 35

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

Answer 35

b. overcome laser lock

Question 36

36. In an IRS:

Answer 36

d. accelerometers and gyros are both strapped down

Question 37

37. 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

Answer 37

c. i iii v

Question 38

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

Answer 38

c. act like an altimeter

Question 39

39. 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

Answer 39

d. i ii iii v

Question 40

40. 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

Answer 40

b. i iii

Question 41

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

Answer 41

a. i ii

Question 42

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

Answer 42

a. one degree of freedom in the vertical axis

Question 43

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

Answer 43

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

Question 44

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

Answer 44

b. iii ii i

Question 45

Sound is propagated at a velocity which is dependent upon:

Answer 45

d. temperature

Question 46

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

Answer 46

b. 650 kt

Question 47

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?

Answer 47

b. 244°

Question 48

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:

Answer 48

c. TAS, 481 kt, Mach 0·855

Question 49

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

Answer 49

d. a turn south

Question 50

A compass swing is used to:

Answer 50

a. align compass north with magnetic north

Question 51

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

Answer 51

dip

Question 52

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

Answer 52

595 kt

Question 53

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

Answer 53

d. it will increase

Question 54

54. 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

Answer 54

c. ii v

Question 55

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

Answer 55

c. distance

Question 56

56. A solid state gyro is:

Answer 56

b. a rate sensor

Question 57

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

Answer 57

b. 2°/min

Question 58

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

Answer 58

b. 0·783

Question 59

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

Answer 59

a. primary display and navigation display respectively

Question 60

60. 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

Answer 60

c. ii iii vi viii ix

Question 61

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

Answer 61

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

Question 62

62. On an EADI radio altitude is displayed:

Answer 62

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

Question 63

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

Answer 63

b. the multi-purpose control and display unit

Question 64

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

Answer 64

c. 1°

Question 65

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

Answer 65

b. 2 nm

Question 66

66. 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:

Answer 66

b. +30 ft