1、Mr. He drove his large bus with 53 passengers (permitted carrying capacity 47) to 454 km mark by 100m along the Yining-hefei Expressway in Nanjing jurisdiction, where he was tailgated by a heavy-type semitrailer tractor. The bus left the road, breaking through the guardrail and catching fire. 17 people were killed and 27 injured. Which of the following law-breaking acts did Mr. He commit?
A、Speeding
B、Exceeding the carrying capacity of the motor bus
C、Driving a motor vehicle overdue for annual inspection
D、Improper operation
Answer：B
2、When a tire suddenly bursts on the road, the driver should violently depress the brake pedal to reduce speed and stop the vehicle.
A、Right
B、Wrong
Answer：B
3、Under such circumstances, what should be done by motor vehicle drivers in order to maintain safe driving?
A、Sound the horn or turn on the headlamps
B、Reduce speed or drive on the right side
C、Keep to the central line as best as possible
D、Drive on the left side of the road
Answer：B
4、When there is a braking failure on a downhill road, if there is no other alternative, the driver may rub the vehicle body against the rocks and trees on roadside to force the vehicle to slow down and stop.
A、Right
B、Wrong
Answer：A
5、When there is a sudden braking failure on the road, what should be done by the driver?
A、Firmly holding the steering wheel and controlling the direction
B、Immediately changing to a low gear to reduce speed
C、Using the stopping brake to reduce speed
D、Turning on the hazard lamps
Answer：ABCD
6、The sign on the right indicates that the speed limit of 40km/hour is lifted on the road ahead.
A、Right
B、Wrong
Answer：A
7、The sign on the right warns of traffic signals ahead.
A、Right
B、Wrong
Answer：A
8、The sign on the right indicates the road width ahead is limited to 3 meters.
A、Right
B、Wrong
Answer：A
9、Under such circumstances, motor vehicles are allowed to cross the central solid line to overtake.
A、Right
B、Wrong
Answer：B
10、When driving onto the left lane, motor vehicle drivers are allowed to make a U-turn.
A、Right
B、Wrong
Answer：A
11、The sign on the right warns of a guarded crossing 150 meters ahead.
A、Right
B、Wrong
Answer：B
12、Drivers may cross these central solid and broken yellow lines when overtaking.
A、Right
B、Wrong
Answer：B
13、Motor vehicles should accelerate when driving into an intersection with this traffic signal.
A、Right
B、Wrong
Answer：B
14、The sign on the left indicates no U-turn at the intersection ahead.
A、Right
B、Wrong
Answer：A
15、Under such circumstances, motor vehicle drivers should bypass on the left quickly.
A、Right
B、Wrong
Answer：B
16、Drivers may go straight and pass through when traffic police give these hand signals
A、Right
B、Wrong
Answer：B
17、When steering failure happens suddenly, if the road condition permits straight movement, drivers should not apply emergency braking.
A、Right
B、Wrong
Answer：A
18、What's the emergency measure to deal with a sudden tire burst on the road?
A、Swiftly braking to slow down
B、Firmly hold the steering wheel and steadily stop the vehicle as early as possible
C、Swiftly turn the steering wheel to adjust the direction
D、Go ahead at a low speed and find a place for tire change
Answer：B
19、The sign in front gives information about the direction of road exits.
A、Right
B、Wrong
Answer：A
20、When braking, side skid or tail swing may occur if the rear wheels are blocked.
A、Right
B、Wrong
Answer：A