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POF part 2

Authored by Quang Đinh

World Languages

1st - 5th Grade

POF part 2
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69 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

81.A jet aircraft flying at high altitude encounters severe turbulence without encountering high speed buffet. If the aircraft decelerates, what type of stall could occur first?

A. Low speed stall.

B. Accelerated stall.

C. Deep stall.

D. Shock stall.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

82.A swept wing aircraft stalls and the wake contacts the horizontal tail. What would be the stall behaviour?

A. Nose down.

B. Nose up and/or elevator ineffectiveness.

C. Tendency to increase speed after stall.

D. Nose up.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

83.An aircraft at low subsonic speed will never stall:

A. As long as the CAS is kept above the power-on stall speed.

B. As long as the IAS is kept above the power-on stall speed.

C. As long as the maximum angle of attack is not exceeded.

D. As long as the pitch angle is negative.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

84.At high angle of attack, where does airflow separation begin?

A. Upper surface, towards the leading edge.

B. Lower surface, towards the trailing edge.

C. Upper surface, towards the trailing edge.

D. Lower surface, towards the leading edge.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

85.At the point of stall:

A. Lift decreases, drag decreases.

B. Lift constant, drag increases.

C. Lift decreases, drag increases.

D. Lift decreases, drag constant.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

86.Force on the tail and its effect on VS due to CG movement:

A. If rearward movement of the CG gives a reduced down-force on the tail, VS will be higher.

B. If forward movement of the CG gives a reduced down-force on the tail, VS will be higher.

C. If rearward movement of the CG gives a reduced down-force on the tail, VS will be reduced.

D. If rearward movement of the CG gives an increased down-force on the tail, VS will be reduced.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

87.How do vortex generators work?

A. Re-direct spanwise flow.

B. Take energy from free stream and introduce it into the boundary layer.

C. Reduce kinetic energy to delay separation.

D. Reduce the adverse pressure gradient.

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