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Gleim Study Unit 1: Airplane Instruments Questions with Solutions
1. On the taxi check, the magnetic compass should: Swing freely and indicate known headings
2. What should be the indication on the magnetic compass as you roll into a standard-rate turn to the left
from an east heading in the Northern Hemi- sphere?: The compass will indicate the approximate correct magnetic heading if the roll into the turn is smooth
3. On what headings will the magnetic compass read most accurate during a level 360° turn, with a bank of
approximately 15°?: 90° and 270°
4. What should be the indication on the magnetic compass as you roll into a standard rate turn to the right from a
south heading in the Northern Hemi- sphere?: The compass will indicate a turn to the right, but at a faster rate than is actually occurring
5. What should be the indication on the magnetic compass when you roll into a standard rate turn to the left
from a south heading in the Northern Hemi- sphere?: The compass will indicate a turn to the left, but at a faster rate than is actually occurring
6. What should be the indication on the magnetic compass as you roll into a standard rate turn to the right
from a northerly heading in the Northern Hemisphere?: The compass will initially indicate a turn to the left
7. What causes the northerly turning error in a magnetic compass?: The magnetic dip characteristic
8. What should be the indication on the magnetic compass as you roll into a standard rate turn to the left
from a north heading in the Northern Hemi- sphere?: The compass will initially indicate a turn to the right
9. While flying at an altitude of 8,000 ft., what CAS must be used to maintain a TAS of 155 kt. if the outside air
temperature is -5°C?: 139 KCAS
10. What CAS must be used to maintain the filed TAS of 158 kt. at the flight planned altitude of
8,000 ft.? (Temperature 0°C): 140 KCAS
11. What CAS must be used to maintain 180kt. TAS at the flight planned altitude of 8,000 ft. if the outside
2 / air temperature is +8°C?: 157 KCAS
12. If both the ram air input and the drain hole of the pitot system are blocked, what reaction should you
observe on the airspeed indicator when power is applied and a climb is initiated out of severe icing conditions?: No change until and actual climb rate is established, then indicated airspeed will increase
13. If the outside air temperature increases during a flight at constant power and at a constant indicated
altitude, the true airspeed will: Increase and true altitude will increase
14. If, while in level flight, it becomes necessary to use an alternate source of static pressure vented inside
the airplane, which of the following variations in instrument indications should the pilot expect?: The altimeter will read higher than normal, airspeed greater than normal, and the VSI will momentarily show a climb
15. During flight, if the pitot tube becomes clogged with ice, which of the follow- ing instruments would be
affected?: The airspeed indicator only
16. If both the ram air input and the drain hole of the pitot system become blocked, the indicated
airspeed will: Increase during a climb
17. If the pitot tube ram air pressure hole and drain hole become obstructed, the airspeed indicator will
operate: like an altimeter as the aircraft climbs and descends
18. If, while in level flight, it becomes necessary to use an alternate source of static pressure vented inside
the airplane, which of the following should the pilot expect?: The vertical speed indicator to momentarily show a climb
19. What would be the indication on the VSI during entry into a 500 FPM actual descent from level flight if the
static ports were iced over?: The VSI pointer would remain at zero regardless of the actual rate of descent
20. If, while in level flight, it becomes necessary to use an alternate source of static pressure vented inside
the airplane, which of the following should the pilot expect?: The altimeter to read higher than normal
21. You check the flight instruments while taxiing and find the vertical speed indicator (VSI) indicates a
descent of 100 feet per minute. In this case, you: May take off under IFR and 100 feet descent as the zero indication
4 / it indicate after landing?: 206 feet below MSL
34. Which of the following defines the type of altitude used when maintaining FL 210?: Pressure
35. En route at FL 290, your altimeter is set correctly, but you fail to reset it to the local altimeter setting of
30.57" Hg during descent. If the field elevation is 650 feet and your altimeter is functioning properly, what is the approximate indication upon landing?: Sea level
36. Under what condition is pressure altitude and density altitude the same value?: At standard temperature
37. Under what condition will true altitude be lower than indicated altitude with an altimeter setting of 29.92"
Hg?: In colder than standard air temperature
38. Which condition would cause the altimeter to indicate a lower altitude than actually flown (true altitude)?:
Air temperature warmer than standard
39. When an altimeter is changed from 30.11" Hg to 29.96" Hg, in which direction will the indicated altitude
change and by what value?: Altimeter will indicate 150 feet lower
40. Which practical test should be made on the electric gyro instruments prior to starting an engine?: Turn on the
electrical power and listen for any unusual or irregular mechanical noises
41. One characteristic that a properly functioning gyro depends upon for operation is the: Resistance to deflection of
the spinning wheel or disc
42. What pre-takeoff check should be made of a vacuum-driven heading indica- tor in preparation for an IFR
flight?: After 5 minutes, set the indicator to the magnetic heading of the aircraft and check for proper alignment after taxi turns
43. What pre-takeoff check should be made of the attitude indicator in preparation for an IFR flight?: The horizon
bar should erect and become stable within 5 minutes
44. During coordinated turns, which force moves the pendulous vanes of a vacuum-driven attitude
indicator resulting in precession of the gyro toward the inside of the turn?: Centrifugal
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45. If a 180° steep turn is made to the right and the aircraft is rolled out to straight-and-level flight by
visual references, the attitude indicator: May show a slight climb and turn
46. During normal coordinated turns, what error due to precession should you observe when rolling out to
straight-and-level flight from a 180° steep turn to the right?: The miniature aircraft would show a slight turn indication to the left
47. During normal operation of a vacuum-driven attitude indicator, what atti- tude indication should
you see when rolling out from a 180° skidding turn to straight-and-level flight?: The miniature aircraft shows a turn in the direction opposite the skid
48. Errors in both pitch and bank indication on an attitude indicator are usually at a maximum as the
aircraft rolls out of a: 180° turn
49. When an aircraft is decelerated, some attitude indicators will process and incorrectly indicate a:
Descent
50. When an aircraft is accelerated, some attitude indicators will process and incorrectly indicate a:
Climb
51. During normal flight with a vacuum driven attitude indicator, control pres- sures normally should not
move the horizon bar more than: One-half bar width with not more than an additional one-half bar width for normal flight deviations
52. Prior to stating an engine, you should check the turn-and-slip indicator to determine if the: Needle is
approximately centered and the tube is full of fluid
53. What indication should be observed on a turn coordinator during a right turn while taxiing?: The miniature aircraft
will show a turn to the right and the ball moves to the left
54. What does the miniature aircraft of the turn coordinator directly display?: Rate of roll and rate of turn
55. The displacement of a turn coordinator during a coordinated turn will: Increase as angle of bank increases
56. What indication should be observed on a turn coordinator during a left turn while taxiing?: The miniature
