West Virginia CDL — Air Brakes Practice Test 5

11.A cab control marked 'normal' and 'slippery' works a front brake limiting valve. On which vehicles does the manual say you might find one?

All trucks built since 1994Some older vehicles, made before 1975Only buses with dual parking control valvesTractors made from March 1, 1997 onward

12.Which of these calls for stopping right away, not just for getting the vehicle serviced soon?

The ABS malfunction lamp staying lit after the start-up bulb checkThe low air warning light and buzzer coming on while you driveThe governor cutting the compressor out near 125 psiAn automatic wig wag swinging up out of view

13.West Virginia's chart lists CDL endorsements by letter, each with a fee, and restrictions by letter. Under which heading are air brakes handled, and with which letters?

Under endorsements, as letters N and TUnder endorsements, as letter XUnder restrictions, as letters E and KUnder restrictions, as letters L and Z

14.Which pairing of an air brake part and where the manual puts it is correct?

Air tank drain valve: at the top of each tankModulating control valve handle: on the trailer's frameABS malfunction lamp on a tractor: on the left rear cornerSafety relief valve: in the first tank the compressor pumps air into

15.On a newer air-braked vehicle, which pairing of knob movement and result is right for the yellow parking brake control?

Pull out to apply the spring brakes; push in to release themPull out to release the spring brakes; push in to apply themTurn left to apply the spring brakes; turn right to release themPull out to open the trailer air supply; push in to close it

16.During West Virginia's vehicle inspection test in a straight truck, you do the one-minute leak check with the foot brake applied, fan the pressure down until the low air warning comes on, and stop there. Which part of Section 11's air brake check did you leave out?

Timing the pressure rise from 85 to 100 psiChecking the compressor's oil levelPulling on each slack adjuster with glovesFanning the pressure down further until the parking brake valve pops out

17.With the engine at a fast idle, your gauge climbs to about 125 psi and stops. You then pump the brake at idle until the gauge reads about 100 psi, and the needle starts to rise again. What has this shown?

The safety relief valve is stuck openThe governor is cutting the compressor out and back in at about the expected pressuresThe air leakage rate is too highThe low pressure warning signal is working

18.Four pressure figures come up in Section 5's description of air brake parts: the safety valve's usual opening point, governor cut-out, governor cut-in, and the low air warning mark. Which order runs from highest to lowest?

Governor cut-out, safety valve opening, governor cut-in, low air warningSafety valve opening, governor cut-out, governor cut-in, low air warningSafety valve opening, governor cut-in, governor cut-out, low air warningGovernor cut-out, governor cut-in, low air warning, safety valve opening

19.Section 5 describes several forms the parking brake control can take, depending on the vehicle's age. Which of these is NOT one of them?

A yellow, diamond-shaped knobA round blue knobA foot pedal to the left of the clutchA lever that moves sideways or up and down

20.West Virginia's table of typical DMV transaction fees lists a knowledge test fee. Which tests does the table say that fee includes?

General knowledge only, with every other test billed separatelyAir brakes, hazardous materials and tank vehiclesGeneral knowledge, air brakes and combinationGeneral knowledge, passenger and school bus