New Mexico CDL — Air Brakes Practice Test 9

11.How many components does New Mexico's manual say make up the air brake check on the vehicle inspection test, and what follows if they are not all performed correctly?

Four components; points are deducted for each one missedTwo components; only the air brake check has to be repeatedThree components; the vehicle inspection test is failed automaticallySeven components; the examiner allows one retry on the spot

12.On New Mexico's CDL Licensing Information sheet, where do air brakes show up?

In the endorsement chart, as endorsement A with a written and a skills testIn the endorsement chart, as part of the combined X endorsementIn the restriction list, as L and Z; there is no air brake endorsementIn the class chart, as a requirement that applies to Class A only

13.Which of these is NOT part of the manual's procedure for a normal stop in an air-braked vehicle?

Pushing the brake pedal down and controlling the pressure for a smooth stopPulling the parking brake knob as the vehicle slows, to help it stopWith a manual transmission, leaving the clutch alone until engine rpm is near idleChoosing a starting gear once you have stopped

14.A bus has dual parking control valves. At the end of a run, which of the two does the manual assign to setting the spring brakes when you park?

The valve that is spring loaded in the "out" positionEither one; the two valves do the same jobThe push-pull valveNeither; the brake pedal sets the spring brakes on a bus

15.Most of the Step 7 final air brake check is done standing still. Which part has you move the vehicle forward at about five mph?

The air leakage rate testThe low pressure warning signal testThe service brake testThe governor cut-in and cut-out check

16.Which of these is NOT one of the low air pressure warning devices described in Section 5?

A red lightA buzzerA yellow lamp on the instrument panelA wig wag arm that drops into the driver's view

17.During the Step 7 leakage test the pressure drop is more than the manual allows, and the driver decides to deal with it after the day's run. What does the manual warn could happen?

The governor could cut in more often and wear out the beltThe ABS lamp could stay lit until the next bulb checkThe alcohol evaporator could run dryThe brakes could be lost while driving

18.A driver who studied another state's manual tests the low pressure warning on a late-model New Mexico truck. Pumping the brake pedal with the engine off, he sees the warning first come on at 57 psi and calls it a pass. How does that compare with Section 5 of New Mexico's manual?

It passes; the signal only has to come on somewhere before pressure reaches 55 psiIt falls short; the signal must come on before pressure drops below 60 psiIt passes; any signal that comes on above 45 psi meets the manual's standardIt falls short; the signal must already be on by the time pressure reaches 85 psi

19.On the vehicle inspection test you check the brake chambers at an axle. Which of these is NOT one of the things Section 11 has you look for?

That the chambers are not leakingThat the chambers are not cracked or dentedThat they are mounted securely, with no loose or missing clampsThat each chamber is labeled with its pushrod stroke limit

20.Does the manual give air-braked vehicles a separate inspection routine of their own?

No; the Section 2 seven-step inspection is used, with air brake items addedYes; a separate five-step air brake routine replaces the seven-step inspectionYes; air-braked vehicles are to be inspected by a mechanic onlyNo; air brakes need no checks beyond those for hydraulic brakes