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Flashcards in POF PRT01 Deck (68)
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1

About which point does an aircraft rotate?

Select one:

a. The wings

b. The main undercarriage

c. The rudder

d. The centre of gravity

d. The centre of gravity

2

If a force of 500 newton´s moves a mass 1000 metres in 2 minutes, the power used is?

Select one:

a. 4 watt

b. 1 egawatt

c. 250 kilowatts

d. 4167 watts

d. 4167 watts

3

Considering Newton´s first law of motion:

1 - A body is said to have energy if it has the ability to work

2 - The amount of energy a body possesses is measured by the amount of work it can do

3 - A body will tend to remain at rest, or in uniform motion in a straight line, unless acted upon by an external force

4 - To move a stationary object or to make a moving object change its direction, a force must be applied

The combination with the correct statements is?
Select one:
a. 3 only
b. 3 and 4
c. 1 and 2
d. 1,2,3 and 4

b. 3 and 4

4

Considering Newton´s second law of motion?

1 - Every action has an equal and opposite reaction

2 - If the same force is applied, the larger the mass the slower the acceleration

3 - if two forces are applied to the same mass, the bigger the force the greater the acceleration

4 - The acceleration of a body from a state of rest, or uniform motion in a straight line, is proportional to the applied force and inversely proportional to the mass.

The combination of true statements is?

Select one:

a. 3 and 4

b. 1,2,3 and 4

c. 2,3, and 4

d. 1 only

c. 2,3, and 4

5

Newton´s third law of motion states?

Select one:

a. Every action has an equal and opposite reaction

b. The energy possessed by a mass is inversely proportional to its velocity

c. For every force there is an action

d. Every force has an equal and opposite inertia

a. Every action has an equal and opposite reaction

6

The unit of force is?

Select one:

a. Newton-Metre

b. Newton

c. Mass-Kilogram

d. Joule

b. Newton

7

The unit of power is called?

Select one:

a. Watt

b. Newton-Metre

c. Joule

d. Meter per second

a. Watt

8

The unit of weight is?

Select one:

a. Newton

b. Kilogram

c. Kilowatt

d. Watt

a. Newton

9

The unit of work is called?

Select one:

a. Pascal

b. Watt

c. Kilogram

d. Joule

d. Joule

10

If a force of 20 Newton´s moves a mass 5 metres?

1 - the work done is 100Nm (Newton meters)

2 - the work done is 100 joules

3 - the work done is 4 joules

4 - the work done is 0.25 joules

The correct statements are?

Select one:

a. 1 and 2

b. 1 and 3

c. 2 only

d. 1 only

a. 1 and 2

11

moving mass of air possesses kinetic energy. An object placed in the path of such a moving mass of air will be subject to which of the following?


Select one:

a. Dynamic pressure

b. Static Pressure

c. Static and dynamic Pressure

d. Dynamic pressure minus static pressure

c. Static and dynamic Pressure

12

Air Density is?

Select one:

a. Mass per unit volume

b. Proportional to temperature and inversely proportional to
pressure

c. Indipendent of both temperature and pressure

d. Dependent only on decreasing pressure with increasing altitude

a. Mass per unit volume

13

When considering the ICAO International Standard Atmosphere and comparing it with the actual atmosphere, which of the following is correct?

1 - Temperature, pressure and density are constantly changing in any given layer of the actual atmosphere

2 - A requirement exists for a hypothetical "standard" atmosphere

3 - The values given in the International Standard Atmosphere exist at a same altitudes in the actual atmosphere

4 - The international Standard Atmosphere was designed for the calibration of pressure instruments and the comparison of aircraft performance calculations.

Select one:

a. 1,2 and 3

b. 2,3 and 4

c. 1,2,3 and 4

d. 1,2 and 4

d. 1,2 and 4

14

When considering the ICAO International Standard Atmosphere, which of the following statements is correct?

1 - The temperature lapse rate is assumed to be uniform at 2°C pr 1000 ft (1,98°C up to a height of 11.000ft)

2 - Sea level temperature is assumed to be 15°C

3 - Sea level static pressure is assumed to be 1.225 kg/m3

4 - Sea level density is assumed to be 1013.25hPa

Select one:

a. 1,2,3 and 4

b. No statements are correct

c. 1,3 and 4

d. 2 only

d. 2 only

15

An aircraft´s critical Mach number is?

Select one:

a. The speed of the airflow when the aircraft first becomes supersonic

b. The speed of the aircraft when the airflow somewhere reaches the speed of sound

c. The indicated airspeed when the aircraft first becomes supersonic

d. The aircraft´s Mach number when airflow over it first reaches the local speed of sound

d. The aircraft´s Mach number when airflow over it first reaches the local speed of sound

16

Dynamic Pressure is?

Select one:

a. The total pressure at a point where a moving airflow is brought completely to rest

b. The amount by which the pressure rises at a point where a moving airflow is brought
completely to rest

c. The pressure due to the mass of air pressing down on the air beneath

d. The pressure change caused by heating when a moving airflow is brought completely to rest

b. The amount by which the pressure rises at a point where a moving airflow is brought
completely to rest

17

Dynamic pressure is equal to?

Select one:

a. density times speed squared

b. Half the density times the indicated airspeed squared

c. Half the true airspeed times the density squared

d. Half the density times the true airspeed squared

d. Half the density times the true airspeed squared

18

The inputs to an Airspeed indicator are from?

Select one:

a. A static source

b. Pitot pressure

c. A pitot and a static source

d. Pitot, static and density

c. A pitot and a static source

19

When considering air:

1 - Air has mass

2 - Air is not compressible

3 - Air is able to flow or change its shape when subject to even small pressures

4 - The viscosity of air is very high

5 - Moving air has kinetic energy

The correct combination of all true statements is?

Select one:

a. 1,2,3 and 5

b. 2,3 and 4

c. 1 and 4

d. 1,3 and 5

d. 1,3 and 5

20

With increasing altitude, up to about 40.000 ft, the charateristics of air change?

1 - Temperature decreases continuously with altitude

2 - Pressure falls steadily to an altitude of about 36.000 ft, where it then remains constant

3 - Density decreases steadily with increasing altitude

4 - Pressure falls steadily with increasing altitude

The combination of true statements is?

Select one:

a. 3 and 4

b. 1,2 and 3

c. 2 and 4

d. 1 and 4

a. 3 and 4

21

A rectangular wing, when compared to other wing planforms, has a tendency to stall first at
the?
Select one:

a. wing root providing adequate stall warning
b. wingtip providing inadequate stall warning
c. wingtip providing adequate stall warning
d. leading edge, where the wing root joins the fuselage

a. wing root providing adequate stall warning

22

A stall warning device must be set to operate?
Select one:

a. at the stalling speed.
b. at a speed just below the stalling speed
c. at a speed about 5% to 10% above the stalling speed
d. at a speed about 20% above the stalling speed.

c. at a speed about 5% to 10% above the stalling speed

23

A stick pusher is?
Select one:

a. a device to prevent an aircraft from stalling

b. a type of trim system

c. a device to assist the pilot to move the controls at high speed

d. a device which automatically compensates for pitch changes at high speed

a. a device to prevent an aircraft from stalling

24

A stick shaker is?
Select one:

a. an overspeed warning device that operates at high Mach numbers

b. an artificial stability device

c. a device to vibrate the control column to give a stall warning

d. a device to prevent a stall by giving a pitch down

c. a device to vibrate the control column to give a stall warning

25

A typical stalling angle of attack for a wing without sweepback is?
Select one:

a. 4°
b. 16°
c. 30°
d. 45°

b. 16°

26

A wing of constant thickness which is not swept back?
Select one:

a. will stall at the tip first due to the increase in spanwise flow

b. could drop a wing at the stall due to the lack of any particular stall inducing characteristics

c. will pitch nose down approaching the stall due to the forward movement of the centre of pressure

d. will stall evenly across the span

b. could drop a wing at the stall due to the lack of any particular stall inducing characteristics

27

An aeroplane will stall at the same?
Select one:

a. angle of attack and attitude with relation to the horizon

b. airspeed regardless of the attitude with relation to the horizon

c. angle of attack regardless of the attitude with relation to the horizon

d. indicated airspeed regardless of altitude, bank angle and load factor

c. angle of attack regardless of the attitude with relation to the horizon

28

An aircraft whose weight is 237402 N stalls at 132 kt. At a weight of 356,103 N it would stall
at?
Select one:

a. 88 kt
b. 162 kt
c. 108 kt
d. 172 kt

b. 162 kt

29

Dividing lift by weight gives?
Select one:

a. wing loading
b. lift/drag ratio
c. aspect ratio
d. load factor

d. load factor

30

For an aircraft with a 1g stalling speed of 60 kt IAS, the stalling speed in a steady 60° turn would
be?
Select one:

a. 43 kt
b. 60 kt
c. 84 kt
d. 120 kt

c. 84 kt