CDL Doubles - Triples Endorsement Practice Test Page 5

28. Some large trucks have convex or "spot" mirrors. These mirrors:

a. are against the law in most states.
b. make things look smaller and farther away than they really are.
c. do not need to be checked as often as flat mirrors because they show a larger area.
d. All of the above.

29. The crack-the-whip effect that troubles trucks with trailers is most likely to tip over:

a. the rear trailer of a triple.
b. the rear trailer of a double.
c. a full trailer behind a truck.
d. a one axle trailer behind a two axle tractor.

30. 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. It depends on the load.
b. None.
c. 1/2 to 3/4 inch.
d. Drivers are not able to visually check this coupling point.

31. 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 ___ and
the pintle hook is ___

a. open; free
b. closed; latched
c. open; latched
d. closed; free

32. Driving a truck with double or triple trailers requires a driver to:

a. look far ahead to allow smooth driving.
b. allow more following distance than for smaller vehicles.
c. use special care in bad weather and mountain conditions.
d. do all of these things.

33. You are driving a 100 foot twin trailer combination at 50 mph. The road is dry
and the visibility is good. You should keep at least ___ seconds of space ahead of you.

a. 5
b. 9
c. 10
d. 11

34. Which of these statements about quick steering movements
and doubles/triples is true?

a. Doubles/triples flip over from quick steering moves more easily than many vehicles.
b. You should apply the brakes at the same time as quick steering movements.
c. Counter steering is easier with doubles/triples than most other vehicles.
d. Quick lane changes are not a problem because it cannot be done with these trucks.

35. You must drive through deep or flowing water. You should not:

a. use a low gear.
b. increase engine rpm.
c. keep gentle pressure on the brakes while going through the water and for a short distance after coming out.
d. drive through quickly.