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an airplane's tire is effectively held off a smooth runway
surface by steam（蒸汽） generated by friction?
A.Reverted rubber hydroplaning.
B.Dynamic hydroplaning.
C.Viscous hydroplaning.
A X
61..With the increase of temperature, the airplane's rolling
distance will ____when takeoff and landing.
A. remain unchanged
B. increase
C. reduce
B X
62..[Refer to Figure 4-25.] How many feet will remain after
landing on a 6,000-foot dry runway with reversers inoperative
at 120,000 pounds gross weight?
A.3,500 feet.
B.2,750 feet.
C.2,150 feet.
A X
63..[Refer to Figure 4-25.] How many feet will remain after
landing on a 7,200-foot dry runway with spoilers inoperative
at 118,000 pounds gross weight?
A.4,200 feet.
B.4,500 feet.
C.4,750 feet.
B X
64..[Refer to Figure 4-25.] How much longer is the dry runway
landing distance using brakes only compared to using brakes
and reversers at 110,000 pounds gross weight?
A.1,000 feet.
B.500 feet.
C.300 feet.
C X
65..[Refer to Figure 4-25.] How much longer is the dry runway
landing distance using brakes only compared to using brakes
and reversers at 114,000 pounds gross weight?
A.1,150 feet.
B.500 feet.
C.300 feet.
C X
66..[Refer to Figure 4-25.] What is the maximum landing weight
which will permit stopping 1,500 feet short of the end of a
4,950-foot dry runway with reversers and spoilers
inoperative?
A.119,000 pounds.
B.136,000 pounds.
C.139,000 pounds.
C X
67..[Refer to Figure 4-25.] What is the maximum landing weight
which will permit stopping 2,000 feet short of the end of a
5,400-foot dry runway with reversers and spoilers
inoperative?
A.117,500 pounds.
B.136,500 pounds.
C.140,500 pounds.
B X
68..[Refer to Figure 4-25.] What is the transition distance
when landing on a dry runway at a gross weight of 125,000
pounds?
A.1,200 feet.
B.850 feet.
C.400 feet.
C X
69..[Refer to Figure 4-25.] Which of the following
configurations will result in the shortest landing distance
over a 50-foot obstacle to a dry runway?
A.Brakes and spoilers at 120,000 pounds gross weight.
B.Brakes and reversers at 115,000 pounds gross weight.
C.Brakes, spoilers, and reversers at 125,000 pounds gross
weight.
C X
70..[Refer to Figure 4-25.] Which of the following
configurations will result in the shortest landing distance
over a 50-foot obstacle to a dry runway?
A.Brakes and spoilers at 125,000 pounds gross weight.
B.Brakes and reversers at 115,000 pounds gross weight.
C.Brakes, spoilers, and reversers at 130,000 pounds gross
weight.
C X
71..[Refer to Figure 4-26.] How many feet will remain after
landing on a 6,000-foot wet runway with reversers inoperative
at 110,000 pounds gross weight?
A.2,100 feet.
B.2,650 feet.
C.3,000 feet.
C X
72..[Refer to Figure 4-26.] How many feet will remain after
landing on a 7,000-foot wet runway with reversers inoperative
at 110,000 pounds gross weight?
A.4,000 feet.
B.4,300 feet.
C.4,500 feet.
A X
73..[Refer to Figure 4-26.] How much longer is the wet runway
landing distance using brakes only compared to using brakes,
spoilers and reversers at 130,000 pounds gross weight?
A.1,000 feet.
B.500 feet.
C.300 feet.
A X
74..[Refer to Figure 4-26.] How much longer is the wet runway
landing distance using brakes only compared to using brakes,
spoilers and reversers at 140,000 pounds gross weight?
A.650 feet.
B.1,300 feet.
C.1,050 feet.
C X
75..[Refer to Figure 4-26.] What is the maximum landing weight
which will permit stopping 1,000 feet short of the end of a
4,900-foot wet runway with reversers and spoilers
inoperative?
A.124,000 pounds.
B.129,500 pounds.
C.134,500 pounds.
A X
76..[Refer to Figure 4-26.] What is the transition distance
when landing on a wet runway at a gross weight of 135,000
pounds?
A.100 feet.
B.300 feet.
C.750 feet.
B X
77..[Refer to Figure 4-26.] Which of the following
configurations will result in the shortest landing distance
over a 50-foot obstacle to a wet runway?
A.Brakes and spoilers at 120,500 pounds gross weight.
B.Brakes and reversers at 125,000 pounds gross weight.
C.Brakes, spoilers, and reversers at 135,000 pounds gross
weight.
C X
78..[Refer to Figure 4-27.] What is the maximum landing weight
which will permit stopping 600 feet short of the end of a
4,600-foot icy runway?
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