ATPL网上题库4飞行原理

正确答案:A

(12)Which is true regarding the forces acting on an aircraft in a steady-state descent?

?

A.The sum of all upward forces is less than the sum of all downward forces.

?

B.The sum of all rearward forces is greater than the sum of all forces.

?

C.The sum of all forward forces is equal to the sum of all rearward forces.

正确答案:C

(13)What performance is characteristic of flight at maximum L/D in a propeller-driven airplane?

? ? ?

A.Maximum range and distance glide. B.Best angle of climb. C.Maximum endurance.

正确答案:A

(14)What is the effect on total drag of an aircraft if the airspeed decreases in level flight below that speed for maximum L/D?

?

A.Drag increases because of increased induced drag.

?

B.Drag increases because of increased parasite drag.

?

C.Drag decreases because of lower induced drag.

正确答案:A

(15)What is the relationship between induced and parasite drag when the gross weight is increased?

? ? ?

A.parasite drag increases more than induced drag B.induced drag increases more than parasite drag C.both parasite and induced drag are equally increased

正确答案:B

(16)What true airspeed and angle of attack should be used to generate the same amount of lift as altitude is increased?

? ?

A.The same true airspeed and angle of attack B.A higher true airspeed for any given angle of attack

?

C.A lower true airspeed and higher angle of attack

正确答案:B

(17)What will be the ratio between airspeed and lift if the angle of attack and other factors remain constant and airspeed is doubled? Lift will be

? ? ?

A.The same.

B.Two times greater. C.Four times greater.

正确答案:C

(18)Why is it necessary to increase back elevator pressure to maintain altitude during a turn? To compensate for the

? ?

A.loss of the vertical component of lift B.loss of the horizontal component of lift and the increase in centrifugal force

?

C.rudder deflection and slight opposite aileron throughout the turn

正确答案:A

(19)At which speed will increasing the pitch attitude cause an airplane to climb?

? ? ?

A.Low speed. B.High speed. C.Any speed.

正确答案:B

(20)If no corrective action is taken by the pilot as angle of bank is increased, how is the vertical component of lift and sink rate affected?

? ? ?

A.Lift increases and the sink rate increases. B.Lift decreases and the sink rate decreases. C.Lift decreases and the sink rate increases.

正确答案:C

(21)If severe turbulence is encountered, which procedure is recommended?

? ? ?

Maintain a constant altitude. Maintain a constant attitude.

Maintain constant airspeed and altitude.

正确答案:B

【解析】遇到剧烈颠簸,如雷暴中如试图保持某一高度几乎是不可能的,而且这样做会增加机体的压力。这时应允许飞

联系客服:779662525#qq.com(#替换为@) 苏ICP备20003344号-4