Reading passages

Aeroplane landing-wheel brakes are fitted to all 
sizes of aircraft for motion after landing, for 
steering during taxing by differential control of 
port and starboard brakes, and to keep the 
aircraft stationary as the engine is warmed-up or 
tested. Small aeroplanes have simple two-shoe 
internal expanding brakes manually operated and 
very similar to the standard road-vehicle brake 
but the larger planes require power-operated 
brakes using compressed air or hydraulic 
pressure from compressors or pumps driven by 
the inline. Landing-wheel brakes have to be as 
light and compact as possible and they must 
remain effective and balanced during very high 
rates of energy dissipation due to the great weight 
of the aeroplane and the very high landing speeds. 
 
 268- It is pointed out in the passage that one of 
the functions of aeroplane's landing-wheel brakes 
is to --------.
A) act as a steering aid 
B) prevent the craft from moving during engine 
warm- up 
C) keep the aircraft steady after landing 
D) prevent the aircraft from landing at very high 
speeds 
E) assist in the dissipation of energy on landing 
 
269- We learn from the passage that the high 
landing speed of a large aeroplane --------.
A) has been one of the determining factors in the 
design of brakes of a large aeroplanes 
B) is proportional to its weigh 
C) opened the way to a more scientific study of 
friction 
D) has occasionally led to wheel-locking 
E) only becomes a problem on poor runways 
270- In the passage, it is stated that the braking 
system of a small aeroplane --------.
A) differs little from that of a larger aeroplane 
B) is not very different from that of ordinary road- 
vehicles 
C) cannot be used to control the speed of the 
aeroplane after landing 
D) is specially designed for coping with high speed 
landings 
E) is both power-operated and manual