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单选题 The air molecules resist this disturbance, and the resistance is manifested as a drag force called ( )
学科：民航机务专业英语
时间：2023-10-06 12:47:45
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题目1单选题
( )is any force acting parallel to the flight path but in the opposite directionA. GravityB. LiftC. DragD. Thrust
题目2单选题
The total drag is the combination of ( ) and ( )A. induced drag; parasite dragB. form drag; skin Friction dragC. form drag; interference dragD. induced drag; interference drag
题目3单选题
While lift is created, some drag is also induced by the creation of lift. And this component of the wing's resultant force is called ( )A. parasite dragB. induced dragC. interference dragD. form drag
题目4单选题
The air molecules resist this disturbance, and the resistance is manifested as a drag force called ( )A. parasite dragB. induced dragC. interference dragD. form drag
题目5单选题
( ) is caused by the frontal area of the airplane components being exposed to the airstreamA. parasite dragB. induced dragC. interference dragD. form drag
题目6单选题
Induced drag is the undesirable but unavoidable by-product of lift, and increases in direct proportion to increases in angle of attack. ( )A. trueB. false
题目7单选题
The greater the angle of attack up to the critical angle, the greater the amount of lift developed, and the greater the induced drag is. ( )A. trueB. false
题目8单选题
The more streamlined an object is, the greater the parasite drag is. ( )A. trueB. false
题目9单选题
The larger the size of the object in the airstream, the greater the parasite drag.( )A. trueB. false
题目10单选题
As speed increases, the amount of parasite drag increases. If the speed is doubled, four times as much drag is produced. ( )A. trueB. false
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