更多"[单选题]Lift is proportional to the sq"的相关试题:
[单选题]Lift is proportional to the square of the airplane’s velocity. If an airplane’s speed is doubled, lift increases _______ .
A.two-fold
B.three-fold
C.four-fold
D.eight-fold
[单项选择]Wife: Honey, we have only one egg and half a bottle of milk in the fridge. Oh, and we are running out of toilet paper...
Husband: （）
A. OK, OK. I'll go to the store fight now.
B. Yes, honey. Let me know what I can do.
C. What's missing, dear
D. Sure, I'll get more next tim
[单选题]_______ represents the relationship between the length and width of a wing. It is one of the primary factors in determining lift/drag characteristics.
A.Aspect ratio
B.Lift-to-drag ratio
C.Load factor
D.Average chord
[单选题]The coefficient of lift is a way to measure lift as it relates to the _______ .
A.area of the wing
B.span of the wing
C.angle of attack
D.relative wind
[单选题]In general, extending large angle simple flaps increases lift and drag coefficient, decreases critical angle of attack, and _______ the ratio of lift and drag.
A.increases
B.does not change
C.decreases
D.is hard to determine whether increasing or decreasing
[单选题]This will be a(n) _______ approach to runway 17, terminating at half mile from touchdown. If no transmissions received for one minute in the pattern or 15 seconds on final. attempt contact 125.5.
A.no-gyro
B.PAR
C.ASR
D.ILS
[单选题]One group of flight instruments operates on the principle of pressure differential to provide the pilot with speed, rate of climb or descent, and altitude, this group is referred to as the _______ instruments.
A.gyroscopic
B.pitot-static
C.altitude
D.attitude
[单项选择]Which of the following income may enjoy a reduced tax or exclusion
A. Off-the-record income
B. Self-employment earnings
C. Business earnings
D. Income from charitable activities
[单项选择]EXPEDITIOUS : SPEED ::
A. astute : wisdom
B. decorous : impropriety
C. thoughtful : inanity
D. haggard : sturdiness
E. portable : frailty
[单项选择]When was the Butler Square building originally built
A. In the eighteenth century.
B. In the early nineteenth century.
C. In the late nineteenth century.
D. In the early twentieth century.
[单选题]触发"SPEED SPEED“语音警告时，这是什么警告？机组的处置是：
A.低能量警告，前推推力手柄至TOGA
B.根据当前情况增加推力和/或调整俯仰，直到语音警告停
止
C.失速警告，前推推力手柄至TOGA卡槽
D.失速警告，前推推力手柄离开当前卡
槽
[单项选择]Because of air pollution being greatly reduced, this city is still ______.
A. a good place in which to live
B. a good place to live in
C. lived as a good place
D. living in as a good place
[单项选择]The population in China ______ reduced in recent years.
A) have been C) is
B) has been D) are
A. The population in China ______ reduced in recent years.
B. have been
C. has been
D. is
E. are
[单项选择]Accidents and exhaustion may force more than half the cyclists to drop out before reaching the ______.
A. dead line
B. end line
C. finish line
D. finishing line
[单项选择]It was such little boys that can't lift up ______ box.
A. so heavy a
B. so a heavy
C. such heavy a
D. a heavy such
[单选题]_______ is the main source of lift.
A.The difference in pressure between the upper and lower surfaces of the wing
B.The difference in curvature between the upper and lower surfaces of the wing
C.The curvature on the upper portion of the wing
D.The curvature on the lower portion of the wing
[单选题]The primary source of lift is _______ .
A.the pressure differential created by movement of air about the wing
B.the atmospheric pressure around the airplane
C.the direction and speed of the wind around the airplane
D.the way the wings are attached to the fuselage
