2026 Indiana DMV Combination Class A Test 1 (20 Questions And Complete Answers)
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The trailer hand valve should be used:
1. Regularly to activate the trailer brakes in all driving conditions.
2. Only to test the trailer brakes.
3. Only in inclement weather when the trailer may skid.
4. Only if the trailer is carrying a load.
1. Regularly to activate the trailer brakes in all driving conditions.
2. Only to test the trailer brakes.
3. Only in inclement weather when the trailer may skid.
4. Only if the trailer is carrying a load.
Only to test the trailer brakes.
When driving a bobtail tractor, you should be aware that:
1. Bobtails stop very easily.
2. Bobtails cannot drive as fast as tractors with semitrailers.
3. Bobtails are more difficult to stop than tractors with semitrailers.
4. Bobtails are illegal in most states.
1. Bobtails stop very easily.
2. Bobtails cannot drive as fast as tractors with semitrailers.
3. Bobtails are more difficult to stop than tractors with semitrailers.
4. Bobtails are illegal in most states.
Bobtails are more difficult to stop than tractors with semitrailers.
Which type of vehicle is most prone to the “crack-the-whip” effect?
1. A five-axle tractor semi-trailer
2. A three-axle tractor semi-trailer
3. A bobtail tractor
4. A triple trailer
1. A five-axle tractor semi-trailer
2. A three-axle tractor semi-trailer
3. A bobtail tractor
4. A triple trailer
A triple trailer
After finishing a pre-trip inspection, you should:
1. Leave the rear shut-off valves open.
2. Remove the service line valve.
3. Close the emergency line valve.
4. Leave the emergency line valve open.
1. Leave the rear shut-off valves open.
2. Remove the service line valve.
3. Close the emergency line valve.
4. Leave the emergency line valve open.
Close the emergency line valve.
Emergency air lines are often coded with the color:
1. Green.
2. Orange.
3. Yellow.
4. Red.
1. Green.
2. Orange.
3. Yellow.
4. Red.
Red.
In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:
1. Air pressure drops to a level between 20 and 45 psi.
2. You are experiencing a trailer jackknife.
3. Wheels have regained traction after a skid.
4. Air pressure is above 45 psi.
1. Air pressure drops to a level between 20 and 45 psi.
2. You are experiencing a trailer jackknife.
3. Wheels have regained traction after a skid.
4. Air pressure is above 45 psi.
Air pressure drops to a level between 20 and 45 psi.
Rollovers happen when drivers:
1. Turn too quickly.
2. Do not driving fast enough.
3. Pay attention to the road.
4. Drive illegally.
1. Turn too quickly.
2. Do not driving fast enough.
3. Pay attention to the road.
4. Drive illegally.
Turn too quickly.
Trailers with low underneath clearance may be difficult to drive:
1. On interstate highways.
2. Over railroad crossings.
3. On dirt roads.
4. At the posted speed limit.
1. On interstate highways.
2. Over railroad crossings.
3. On dirt roads.
4. At the posted speed limit.
Over railroad crossings.
Test the tractor protection valve by:
1. Removing the air supply knob.
2. Removing the parking brake control knob.
3. Releasing air with the brake pedal.
4. Releasing air with the gas pedal.
1. Removing the air supply knob.
2. Removing the parking brake control knob.
3. Releasing air with the brake pedal.
4. Releasing air with the gas pedal.
Releasing air with the brake pedal.
When lightly loaded, combination vehicles:
1. Should not be driven.
2. Have reduced braking capabilities.
3. Will not rollover.
4. Should be loaded with most of the weight in the rear of the trailer.
1. Should not be driven.
2. Have reduced braking capabilities.
3. Will not rollover.
4. Should be loaded with most of the weight in the rear of the trailer.
Have reduced braking capabilities.
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