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121
Why a damage of exhaust system is a danger?
Noise can damage the driver’s ears.
Poisonous fumes can enter into the cab or sleeping compartment. ✓ CORRECT
You can pollute the air with the exhaust smoke.
122
Which of these is NOT a danger when an automatic transmission is forced into a low gear at a high speed?
A loss of engine braking effect. ✓ CORRECT
Damage to the transmission.
A loss of steering control.
123
Perception distance is the distance your vehicle travels from the time:
Your eyes see a hazard to the time your foot pushes to the brake pedal.
The brain tells the foot to push the brake pedal to time the foot responses.
The eyes see a hazard to the time the brain knows that this is a hazard. ✓ CORRECT
124
Extra care is needed to keep your vehicle centered in your lane because commercial vehicles:
Require a lot of room to change lane.
Are often wider than other vehicles. ✓ CORRECT
Tend to sway from time to time.
125
You should lightly apply your brakes to flash the brake lights if:
You are about to exit the road and need to slow down. ✓ CORRECT
A police car is approaching you from the other direction.
A driver tailgates your vehicle.
126
Merging to the road is safest if you:
Wait for a large enough gap in the traffic to enter the road. ✓ CORRECT
Bend over into the nearest lane so the other vehicles will give you room.
Gain speed on the shoulder and then merge.
127
Which of these is NOT something you should do if your headlights are not working properly?
Leave on your high beams. ✓ CORRECT
Clean your headlights.
Adjust headlights.
128
Which of the statement about backing a heavy vehicle is NOT true?
You should back and turn toward the driver’s side whenever it is possible.
You should use a helper and communicate with him with hand signals.
Because you cannot see you should back slowly until you slightly bumped into the dock. ✓ CORRECT
129
The distance that you should look ahead of your vehicle while driving is about ___ at low speed.
1 block. ✓ CORRECT
2 blocks.
1/2 block.
130
The distance that you should look ahead of your vehicle while driving is about ___ at low speed.
1 block. ✓ CORRECT
2 blocks.
1/2 block.