POF Q36 - Limitations

Question 1

A jet transport aeroplane is in a straight climb at a constant IAS and constant weight. The operational limit that may be exceeded is:
Select one:

a.VMO.

b.MMO.

c.VA.

d.MD.

Answer 1

b.MMO.

Question 2

Which of these statements about flutter are correct or incorrect? 1) If flutter occurs, IAS should be reduced. 2) Resistance to flutter increases with increasing wing stiffness.
Select one:

a.1) is correct, 2) is incorrect.

b.1) is incorrect, 2) is incorrect.

c.1) is incorrect, 2) is correct.

d.1) is correct, 2) is correct.

Answer 2

d.1) is correct, 2) is correct.

Question 3

VLE is defined as the:
Select one:

a.maximum flap extended speed.

b.maximum speed at which the landing gear may be extended or retracted.

c.maximum authorised speed.

d.maximum landing gear extended speed.

Answer 3

d.maximum landing gear extended speed.

Question 4

What is the relationship of VMO and MMO, in a climb and descent?
Select one:

a.If climbing at VMO, it is possible to exceed MMO.

b.If descending at MMO, VMO cannot be exceeded.

c.If climbing at VMO, Mach number is decreasing.

d.If climbing at MMO, Indicated Airspeed is increasing.

Answer 4

a.If climbing at VMO, it is possible to exceed MMO.

Question 5

Which of these statements about flutter are correct or incorrect? 1) Mass balancing increases the likleyhood of flutter. 2) The risk of flutter increases as IAS increases.
Select one:

a.1) is correct, 2) is correct.

b.1) is incorrect, 2) is correct.

c.1) is incorrect, 2) is incorrect.

d.1) is correct, 2) is incorrect.

Answer 5

b.1) is incorrect, 2) is correct.

Question 6

Control surface flutter can be reduced by:
Select one:

a.mass balancing of the control surface.

b.reducing structural stiffness of the control surface attachment structure.

c.increasing airspeed.

d.aerodynamic balancing of the control surface.

Answer 6

a.mass balancing of the control surface.

Question 7

VMO:

Select one:

a.should not be greater than VC

b.should not be less than VD

c.should be chosen in between VC and VD

d.is equal to the design speed for maximum gust intensity

Answer 7

a.should not be greater than VC

Question 8

A commercial jet aeroplane is performing a straight descent at a constant Mach number with constant mass. The operational speed limit that may be exceeded is:
Select one:

a.MMO.

b.VD.

c.VNE.

d.VMO.

Answer 8

d.VMO.

Question 9

What can happen to the aeroplane structure flying at a speed just exceeding VA?
Select one:

a.It may suffer permanent deformation because the flight is performed at too large dynamic pressure.

b.It may break if the elevator is fully deflected upwards.

c.It will collapse if a turn is made.

d.It may suffer permanent deformation if the elevator is fully deflected upwards.

Answer 9

d.It may suffer permanent deformation if the elevator is fully deflected upwards.

Question 10

What may happen if the “ultimate load factor” is exceeded?
Select one:

a.Structural failure.

b.No structural failure, only plastic or permanent deformation.

c.Elastic or temporary deformation only.

d.Flutter.

Answer 10

a.Structural failure.

Question 11

The positive manoeuvring limit load factor for a light aeroplane in the utility category in the clean configuration may not be more than:
Select one:

a.4,4

b.2,5

c.6

d.3,8

Answer 11

a.4,4

Question 12

Which factor should be taken into account when determining VA?
Select one:

a.The limit load factor.

b.The calculation factor.

c.The ultimate load factor.

d.The safety factor.

Answer 12

a.The limit load factor.

Question 13

How does VA (EAS) change when the aeroplane’s mass decreases by 19%?
Select one:

a.VA does not change.

b.19% reduced.

c.4,36% reduced.

d.10% reduced.

Answer 13

d.10% reduced.

Question 14

The manoeuvring speed VA, expressed as indicated airspeed, of a transport aeroplane:
Select one:

a.depends on aeroplane mass and pressure altitude.

b.depends on aeroplane mass and is independent of pressure altitude.

c.is independent of aeroplane mass, but dependent on pressure altitude.

d.is a constant value.

Answer 14

a.depends on aeroplane mass and pressure altitude.

Question 15

An aircraft has a mass of 60.000 kg and a limiting positive load factor of 2,5 g. VA is calculated as the EAS at which full positive elevator deflection will give the limiting load factor at the stall, and is 237 kts. If the aircraft mass is reduced to 40.000 kg by fuel burn, what will be the new VA?
Question 15 Select one:

a.150 kts

b.237 kts

c.194 kts

d.375 kts

Answer 15

c.194 kts

Vs new = Vs old x √(new mass ÷ old mass)
Va new = 237 x √(40000 ÷ 60000)
Va new = 193.51 knots

Question 16

Which of these statements about the gust load factor on an aeroplane are correct or incorrect?

1) When the slope of the lift versus angle of attack curve increases, the gust load factor increases.
2) When the wing loading increases, the gust load factor decreases.

Select one:

a.1) is correct, 2) is incorrect.

b.1) is correct, 2) is correct.

c.1) is incorrect, 2) is correct.

d.1) is incorrect, 2) is incorrect.

Answer 16

b.1) is correct, 2) is correct.

Question 17

Which of these statements about the gust load factor on an aeroplane are correct or incorrect?

1) When the mass decreases, the gust load factor increases.
2) When the altitude decreases, the gust load factor increases.

Select one:

a.1) is correct, 2) is correct.

b.1) is correct, 2) is incorrect.

c.1) is incorrect, 2) is incorrect.

d.1) is incorrect, 2) is correct.

Answer 17

a.1) is correct, 2) is correct.

Question 18

Which of the following is a correct design gust value factor applied in certification under EASA CS-25?

Select one:

a.50 ft/sec at VC.

b.55 ft/sec at VC.

c.25 ft/sec at VB.

d.66 ft/sec at VD.

Answer 18

a.50 ft/sec at VC.

Question 19

Which of these statements about the gust load factor on an aeroplane are correct or incorrect?

1) When the wing area decreases, the gust load factor increases.
2) When the EAS decreases, the gust load factor decreases.

Select one:

a.1) is incorrect, 2) is incorrect.

b.1) is incorrect, 2) is correct.

c.1) is correct, 2) is incorrect.

d.1) is correct, 2) is correct.

Answer 19

b.1) is incorrect, 2) is correct.

Question 20

Which of these statements about the gust load factor on an aeroplane are correct or incorrect?

1) When the mass increases, the gust load factor increases.
2) When the altitude increases, the gust load factor increases.

Select one:

a.1) is correct, 2) is incorrect.

b.1) is correct, 2) is correct.

c.1) is incorrect, 2) is incorrect.

d.1) is incorrect, 2) is correct.

Answer 20

c.1) is incorrect, 2) is incorrect.

Question 21

Which of these statements about the gust load factor on an aeroplane are correct or incorrect? 1) When the wing area increases, the gust load factor decreases. 2) When the EAS increases, the gust load factor decreases.

Select one:

a.1) is incorrect, 2) is correct.

b.1) is correct, 2) is correct.

c.1) is incorrect, 2) is incorrect.

d.1) is correct, 2) is incorrect.

Answer 21

c.1) is incorrect, 2) is incorrect.

Question 22

Which of the following is a correct design gust value factor applied in certification under EASA CS-25?

Select one:

a.55 ft/sec at VD.

b.50 ft/sec at VD.

c.25 ft/sec at VB.

d.66 ft/sec at VB.

Answer 22

d.66 ft/sec at VB.

Question 23

Which of these statements concerning flight in turbulence is correct?
Select one:

a.VB is the design speed for maximum gust intensity.

b.The load factor in turbulence may fluctuate above and below 1, but will not become negative.

c.In severe turbulence, speed should be reduced to approximately 1,2 VS.

d.The load factor in turbulence cannot exceed the ultimate load factor.

Answer 23

a.VB is the design speed for maximum gust intensity.