When making a lane change, when should you check your mirrors

• before and after signaling the change
• right after starting the lane change
• after completing the lane change
• all of the above

When performing a vehicle inspection and a two trailer rig, the shut-off valve at the rear of the front trailer should be open

• true
• False

When the full weight of the trailer is resting on the tractor, you should hit the landing gear at approximately 30° angle

• true
• False

When inspecting double trailers, the shut-off valves at the rear of the last trailer should be open

• true
• false

When pulling double trailers, you should  brake firmly while going through recur

• true
• False

Which of the statement is true

• empty trucks require shorter stopping distance than full ones
• empty trucks may have poor traction due to balancing and wheel lockup
• you should always downshift while stopping an empty truck
• all of the above

Which of these statements is true

• the longest combination vehicles are the least likely to turn over
• a sudden steering movement may result in the rear trailer rolling over
• doubles and triples have a higher safe speed on curves than a straight truck
• rearward implication may prevent the crack the whip effect from turning over all trailers

Which of the following statements are true

• at highway speeds, you should look at least 1/4 mile ahead of your truck
• good drivers shift their attention back and forth, near and far
• many drivers do not look for in a ahead when driving
• all of the above

While driving a double, you must make a quick stop in order to avoid a crash you should

• push the brake pedal as hard as you can and hold it there
• use only the trailer brakes
• use light, steady pressure on the  brake pedal
• use controlled or stab braking

With the hand valve applied, you test trailer brakes by opening the service line valve at the rear of the last trailer. You should

• here the spring brakes engage on all trailers
• here the spring brakes engage on the last trailer
• here air escape from the open valve
• here nothing. Escaping air would indicate an internal leak

You should check trailer height before connecting a converter dolly to a second or third trailer. The trailer height is right when

a. Open the emergency line shut-off on the rear trailer.

 b. Open the hand valve with the rig parked.

 c. Confirm that air pressure is in normal operating range.

d. Turn off engine. Check for air pressure drop. 

a. Open the emergency line shut-off on the rear trailer.

 You should check for air at the rear of the second trailer by opening the emergency line shut-off.

a. True

b. False 

You should release the dolly brakes before disconnecting the dolly air and electric lines when uncoupling the rear trailer.

a. True

b. False 

You are driving a 62-foot long double trailer combination at 35 mph. Pavement is dry and visibility is excellent. How much following distance in seconds should you maintain at all times?

a. 5 seconds.

b. 6 seconds.

c. 7 seconds.

d. 8 seconds. 

You should use trailer brakes to stop he skid

• True
• false

. You should pull the tractor forward gently while the trailer brakes are still locked to check that the trailer is locked into the tractor.

a. True

b. False

You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel?

a. Just enough to see daylight between.

b. None.

c. 1/4 to 3/4 inch.

d. Less than ½ inch.

You are driving a triple rig. Which trailer is most likely to turn over in an emergency maneuver?

a. Front trailer. b. Middle trailer. c. Rear trailer. 

You are doing a walk-around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are closed and the pintle hook is latched.

a. True b. False

You are driving a 90 ft. long double trailer combination at 45 mph. Pavement is dry and visibility is excellent. How much following distance in seconds should you maintain?

a. 8. b. 9. c. 10. d. 11.

You should release the pintle hook on the first semi-trailer before pulling clear of the converter dolly.

a. True b. False  

 “Spot,” convex, or “bug-eye” mirrors . . .

a. make objects appear smaller and farther away than they really are.

b. make objects appear larger and closer than they really are.

c. should not be used under any circumstance.

d. narrow the field of vision.