正确答案：C
(42)How can the pilot increase the rate of turn and decrease the radius at the same time?
? ? ?
A．Steepen the bank and increase airspeed. B．Steepen the bank and decrease airspeed. C．Shallow the bank and increase airspeed.
正确答案：B
43)How can turbulent air cause an increase in stalling speed of an airfoil?
? ? ?
A．An abrupt change in relative wind. B．A decrease in angle of attack. C．Sudden decrease in load factor.
正确答案：A
(44)What is the relationship of the rate of turn with the radius of turn with a constant angle of bank but increasing airspeed?
? ? ?
A．Rate will decrease and radius will increase. B．Rate will decrease and radius will decrease. C．Rate and radius will increase.
正确答案：A
(45)Which condition would INITIALLY cause the indicated airspeed and pitch to increase and sink rate to decrease?
? ? ?
A．Sudden increase in a headwind component. B．Sudden decrease in a headwind component. C．Tailwind which suddenly increase in velocity.
正确答案：A
(46)Which of the following is not the way of increasing MCRIT in jet transport designs?
? ? ?
A．Give the wing a lower camber. B．Increase wing sweep. C．Add slats.
正确答案：C
(47)Within what Mach range does transonic flight regimes usually occur?
? ? ?
A．0.50 to 0.75 Mach B．0.75 to 1.20 Mach C．1.20 to 2.50 Mach
正确答案：B
(48)At what Mach range does the subsonic flight range normally occur?
? ? ?
A．Below .75 Mach. B．From .75 to 1.20 Mach. C．From 1.20 to 2.50 Mach.
正确答案：A
(49)What is the free stream mach number which produce first of local sonic flow?
? ? ?
A．supersonic Mach number B．transonic Mach number C．critical Mach number
正确答案：C
(50)What is the highest speed possible without supersonic flow over the wing?
? ? ?
A．critical Mach number B．initial buffet speed C．transonic index
正确答案：A
(51)Which maximum range factor decrease as weight decrease?
? ? ?
A．Airspeed. B．Angle of attack. C．Altitude.
正确答案：A
(52)Which maximum range factor increases as weight decreases?
? ? ?
A．Angle of attack. B．Altitude. C．Airspeed.
正确答案：B
(53)What should a pilot do to maintain \airplane performance when a headwind is encountered?
?
A．Increase speed.