(9)The eye moves in what are termed “saccades” jerks and rests. In visual searching a saccade/rest cycle usually occupies roughly?
? ? ?
A．0.3 s B．1.0 s C．3 s
正确答案：C
(10)The function of the ciliary muscles in the eyes is to
? ?
A．move the eyes from left to right in the socket B．change the size of the pupil to vary the amount of light entering the eye
?
C．alter the shape of the lens to allow the eye to focus on objects at various distances
正确答案：C
(11)When light passes through the lens it is brought to focus at the back of the eyeball on the
? ? ?
A．retina B．cornea C．iris
正确答案：A
(12)With age increases, the lens of eye generally becomes
?
A．cracked
? ?
B．too stiff C．too elastic
正确答案：B
(13)After been in exposed to normal lighting, dark adaptation (night vision) returns after a recovery period of about
? ? ?
A．30 minutes B．1 hour C．5 minutes
正确答案：A
(14)If a pilot whose eyes have fully adapted to darkness is exposed to a bright flash of light, the time required for dark adaptation to be re-established is most likely to be
? ? ?
A．3 minutes B．15 minutes C．30 minutes
正确答案：C
(15)How long is needed for full dark adaptation?
? ? ?
A．10-20min B．35-45min C．20-30min
正确答案：B
(16)Empty Field Myopia is the tendency of the ciliary muscle to relax when there are no close objects in the field of view. This causes the eye to take up a focal length of approximately
? ? ?
A．one to two meters B．five meters C．infinity
正确答案：A
(17)The part of the eye which bends in coming light the most is the
? ? ?
A．refractive disc B．lens C．cornea
正确答案：B
(18)The eye adapts to different level by
? ? ?
the lens becoming progressively opaque chemical changes in the retina chemical changes in the cornea
正确答案：A
(19)Relying on the instruments and believing what they tell you, are the keys to avoid vestibular illusion. The statement is
? ?
A．right B．wrong
?
正确答案：A
(20)Scanning procedures for effective collision avoidance should constitute
?
A．looking outside for 15 seconds, then inside for 5 seconds, then repeat.
?
B．1 minute inside scanning, then 1 minute outside scanning, then repeat.
?
C．looking outside every 30 seconds except in radar contact when outside scanning is unnecessary.
正确答案：A
(21)The blind spot is
? ? ?
A．the area of the lens which is screened by the iris B．at the junction of the optic nerve and the retina C．an area on the cornea which does not respond to light
正确答案：B
(22)Sinus barotraumas is most likely to occurred during
? ? ?
A．Descent
B．Takeoff from a high altitude C．Level flight in turbulence
正确答案：A
(23)Age-related hearing loss is called
? ? ?
A．presbycusis B．presbyopia C．presbyterianism
正确答案：A
(24)Perception involves creation of mental models of the outside world which are based
? ?
A．entirely on experience and expectation
B．mainly on sensory information but also on experience and expectation to some degree
?
C．entirely on sensory information
正确答案：B
(25)When flying orientation is most reliably determined through information sensed by the
? ? ?
A．somatic sensory system B．visual system C．vestibule apparatus
正确答案：B
(26)The brain perceives the body's orientation in space by
? ? ?
A．processing information from the eyes B．processing information from the inner ear C．by combining and comparing visual, vestibular and postural cues