OR CDL AIR BRAKES PRACTICE TEST
16.
Typically an air system is fully-charged at:
|
250 psi
|
|
|
75 psi
|
|
|
125 psi
|
|
|
25 psi
|
17.
Supply pressure gauges tell drivers:
|
how much air pressure they are applying to the brakes.
|
|
|
how much pressure is in the air tanks.
|
|
|
how much pressure the relay valves should send to the trailer brakes.
|
|
|
All of the above.
|
18.
Emergency brakes and parking brakes must be held on by:
|
hydraulic pressure.
|
|
|
air pressure.
|
|
|
mechanical force.
|
|
|
All of the above.
|
19.
Radial and bias-ply tires:
|
should be used together only during bad weather.
|
|
|
should be used together only when driving in packed snow.
|
|
|
should be used together.
|
|
|
should not be used together.
|
20.
When you apply the brakes, the brake shoes and linings are pushed against:
|
the S-cam.
|
|
|
the supply pressure gauge.
|
|
|
the safety relief valve.
|
|
|
None of the above.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More