SD CDL COMBINATION TEST - PRACTICE TEST
11.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
|
shifting into neutral may help slow the vehicle.
|
|
|
pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
|
|
|
the parking brake should never used to slow the vehicle.
|
|
|
All of the above.
|
12.
Most heavy vehicles require ________ change gears.
|
double shifting
|
|
|
triple shifting
|
|
|
double clutching
|
|
|
single clutching
|
13.
During your inspection, you should look into the fifth-wheel gap and check that the _________ are fully closed around the kingpin.
|
lug nuts
|
|
|
locking jaws
|
|
|
couplings (U-joints)
|
|
|
mounting bolts
|
14.
The wheels of a large combination vehicle are more likely to lock up when:
|
the vehicle is lightly loaded.
|
|
|
you are traveling in very hot weather.
|
|
|
the vehicle is heavily loaded.
|
|
|
the trailer has new tires.
|
15.
Inspecting the fifth-wheel does NOT include:
|
backing until the fifth-wheel just touches the trailer.
|
|
|
making sure that the fifth wheel is in the proper position for coupling.
|
|
|
checking that there are no cracks in the frame.
|
|
|
checking for missing or damaged parts.
|
16.
Emergency brakes must be must be held on by:
|
air pressure.
|
|
|
water.
|
|
|
mechanical force.
|
|
|
the locking mechanism.
|
17.
What happens when the center of gravity of a truck moves higher up from the road?
|
The vehicle is more stable while turning.
|
|
|
It becomes much easier to downshift at the right rpm.
|
|
|
The truck becomes easier to turn over.
|
|
|
It is easier it is to turn around corners.
|
18.
In a vehicle with a dual air brake system:
|
both systems typically operate the regular brakes on the rear axle.
|
|
|
each system has its own air tanks.
|
|
|
one system supplies air to the trailer.
|
|
|
All of the above.
|
19.
If you have convex mirrors, be aware that:
|
in a convex mirror objects appears larger than they really are.
|
|
|
objects may appear to be faster than they really are.
|
|
|
objects seem closer than they really are.
|
|
|
everything appears smaller in a convex mirror than it would if you were looking at it directly.
|
20.
If you discover a fire, before opening trailer doors you should:
|
have a helper open the doors.
|
|
|
use the fire extinguisher on the doors.
|
|
|
feel the doors to see if they are hot.
|
|
|
All of the above.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More