POF part 2

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.

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.

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.

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.

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.

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.

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.

88.If the stalling speed in a 15 degree bank turn is 60 kt, what would the stall speed be in a 45 degree bank?

• A. 83 kt.

• B. 70 kt.

• C. 85 kt.

• D. 60 kt.

89.If the straight and level stall speed is 100 kt, what will be the stall speed in a 1·5g turn?

• A. 122 kt.

• B. 150 kt.

• C. 81 kt.

• D. 100 kt.

90.In recovery from a spin:

• A. Ailerons should be kept neutral.

• B. Airspeed increases.

• C. Ailerons are used to stop the spin.

• D. Rudder and ailerons are used against the direction of spin rotation.