Comercial test 2024

Name:
Date :

1. Deviation error of the magnetic compass is caused by

a) northerly turning error.
b) certain metals and electrical systems within the aircraft.
c) the difference in location of true north and magnetic north.

2. Which statement is true about magnetic deviation of a compass?

a) deviation is the same for all aircraft in the same locality.
b) deviation varies for different headings of the same aircraft.
c) deviation is different in a given aircraft in different localities.

3. In the Northern Hemisphere, a magnetic compass will normally indicate a

turn toward the north if
a) a left turn is entered from a west heading.
b) an aircraft is decelerated while on an east or west heading.
c) an aircraft is accelerated while on an east or west heading.

4. In the Northern Hemisphere, if an aircraft is accelerated or decelerated, the

magnetic compass will normally indicate
a) a turn momentarily, with changes in airspeed on any heading.
b) a turn toward the south while accelerating on a west heading.
c) correctly when on a north or south heading while either acceleration or
decelerating.

5. In the Northern Hemisphere, which would be correct about starting the

rollout from a turn using a magnetic compass? start the rollout
a) after the compass indication passes south by a number of degrees
approximately equal to the latitude minus the normal rollout lead.
b) before the compass indication reaches south by a number of degrees
approximately equal to the latitude over which the turn is made plus the
pilot’s normal lead
c) after the compass indication passes south by a number of degrees
approximately equal to the magnetic variation of the area over which the
turn is made plush the pilot’s normal lead
6. 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
hemisphere?
a) the compass will initially indicate a turn to the left.
b) the compass will indicate a turn to the right, but at a faster rate than is
actually occurring.
c) The compass will remain on south for a short time, then gradually catch
up to the magnetic heading of the airplane.

7. The magnetic compass always point to

a) north
b) south
c) west

8. Deviation in magnetic compass is defined as

a) Local magnetic fields in an aircraft caused by electrical current flowing in
the structure, in nearby wiring, or any magnetized part of the structure
b) It is affected by the current geographic location
c) It is affected by nearby aircrafts.

9. In aerial navigation, the difference between true and magnetic directions is

called
a) Deviation
b) Variation
c) Oscillation

10. where the magnetic compass would be more accurate

a) In the Northern Hemisphere.
b) In the Southern Hemisphere..
c) On the equator.

11. What is an advantage of an electric turn coordinator if the airplane has a

vacuum system for other gyroscopic instruments?
a) It is a backup in case of vacuum system failure.

b) It is more reliable than the vacuum-driven indicators.

c) It will not tumble as will vacuum-driven turn indicators.

12. .what are the 2 gyroscopic principals

a) rigidity and mechanical
b) mechanical and precession
c) rigidity and precession
13. If the centrifugal forces is greater than the horizontal component of lift and

the ball is outside of the turn is?

a) skidding

b) slipping

c) straight level flight

14. What are the instruments that use gyroscopes

a) heading indicator,turn coordinator ,attitude indicator

b) airspeed indicator,turn coordinator,heading indicator

c) altimeter indicator,airspeed indicator , vertical speed indicator

15. A turn coordinator provides an indication of the

a) movement of the aircraft about the yaw and roll axis.

b) angle of bank up to but not exceeding 30°.

c) attitude of the aircraft with reference to the longitudinal axis.

16. The angle of attack of a wing directly controls the

a) angle of incidence of the wing.

b) amount of airflow above and below the wing.
c) distribution of pressures acting on the wing.

17. What action is necessary to make an aircraft turn?

a) Yaw the aircraft.
b) Change the direction of lift.
c) Change the direction of thrust.

18. The point on an airfoil through which lift acts is the

a) center of gravity.
b) center of pressure.
c) midpoint of the chord.
19. To receive accurate indications during flight from a heading indicator, the
instrument must be
a) set prior to flight on a known heading.
b) calibrated on a compass rose at regular intervals.
c) periodically realigned with the magnetic compass as the gyro precesses.

20. What is the relationship between centrifugal force and the horizontal lift
component in a coordinated turn?
a) Horizontal lift exceeds centrifugal force.
b) Horizontal lift and centrifugal force are equal.
c) Centrifugal force exceeds horizontal lift.

21. What are the components that are part of the lift formula?
a. Wing area and aircraft weight
b. Angle of attack and air velocity
c. Lift coefficient and air density

22. How is parasitic drag and induced drag affected in relation to increase
velocity?
a. Parasitic drag decreases, induced drag increases
b. Parasitic drag increases, induced drag decreases
c. Both drags decrease
23. What does the term “L/D Max” represent?
a. The maximum speed at which an aircraft can fly
b. The maximum angle of attack before stall occurs
c. The ratio between lift and maximum drag

24. What is “total drag”?

a. The total resistance experienced by an aircraft in flight
b. The force that prevents an aircraft from moving forward
c. The sum of induced drag and parasitic drag

25. How is the Mach number affected by changes in air temperature?

a. The Mach number is not affected by changes in temperature.
b. The Mach number decreases as the temperature increases.
c. The Mach number increases as the temperature increases.

26. What aerodynamic phenomenon is commonly associated with the formation

of vortices at the wingtips of an aircraft?
a. Increase in directional stability
b. Induced drag
c. Loss of lift
27. What effect is typically observed in relation to induced drag and lift when an
aircraft enters ground effect during takeoff or landing?
a. Induced drag increases and lift decreases.
b. Induced drag decreases and lift increases.
c. Induced drag and lift remain constant.

28. Which of the following statements best describes the difference in stability
between a rectangular wing and a swept-back wing on an aircraft?
a. Both wings have the same stability due to their aerodynamic
design.
b. The rectangular wing is less stable due to its larger surface area.
c. The swept-back wing is less stable due to the reduction of lift at
the wing root.

29. What is the fundamental concept of Bernoulli’s principle in aerodynamics?

a. Air pressure increases with velocity.
b. Air velocity increases when pressure decreases.
c. Air density increases with altitude.

30. How does velocity affect the lift force generated by a wing?
a. The lift force decreases exponentially with the velocity of the
airflow.
b. The lift force increases linearly with the velocity of the airflow.
c. The lift force increases quadratically with the velocity of the
airflow.
31. L/D max is the airspeed that provides
a. Maximum range with or without power
b. Maximum endurance and maximum rate of climb
c. maximum angle of climb and maximum level flight speed

32. In small airplanes, normal recovery from spins may become difficult if the
a. CG is too far rearward and rotation is around the longitudinal axis.
b. spin is entered before the stall is fully developed.
c. CG is too far rearward and rotation is around the CG.

33. If the airplane attitude remains in a new position after the elevator control is
pressed forward and released, the airplane displays
a. positive longitudinal static stability.
b. neutral longitudinal dynamic stability.
c. neutral longitudinal static stability.
34. In theory, if the angle of attack and other factors remain constant and the
airspeed is doubled, the lift produced at the higher speed will be
a. the same as at the lower speed.
b. two times greater than at the lower speed.
c. four times greater than at the lower speed.

35. The ratio of an airplane's true airspeed to the speed of sound in the same
atmospheric conditions is
a. equivalent airspeed.
b. transonic airflow.
c. mach number.

36. If a standard rate turn is maintained, how long would it take to turn 360°?
a. 1 minute
b. 4minutes
c. 2minutes

37. What could be one result of exceeding critical Mach number?

a. Propeller stall.
b. Wing Stall.
c. Aircraft Control Difficulties

38. True airspeed is best described as calibrated airspeed corrected for

a. Instrument Error
b. Non-standard Temperature
c. Altitude and non-standard temperatura

39. Which is the correct symbol for the stalling speed or the minimum steady
flight speed at which the airplane is controllable?
a. Vs0
b. Vs1
c. Vs

40. Stall speed is affected by

a. Load factor, angle of attack, and power
b. Angle of attack and air density
c. Weight, load factor and power.

41. If the same angle of attack is maintained in ground effect as when out of
ground effect, lift will
a. decrease, and parasite drag will increase.
b. increase, and induced drag will increase.
c. increase, and induced drag will decrease
clave
1. b
2. b
3. c
4. c
5. a
6. b
7. a
8. a
9. b
10. c
11. a
12. c
13. a
14. a
15. a
16. c
17. b
18. b
19. c
20. b
21. c
22. b
23. c
24. c
25. c
26. b
27. b
28. c
29. b
30. c
31. a
32. c
33. c
34. c
35. c
36. c
37. c
38. c
39. c
40. c
41. c