T4 Brake Test SET I QUESTIONS WITH ANSWERS

T4 Brake Test SET I QUESTIONS WITH
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ANSWERS

1. An air leak at 'tank 1' in the system would cause which
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of these to leak down?
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|\ A. #1 tank only
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|\ B. #2 tank only
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|\ C. #2 and #4 tanks only
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|\ D. The entire system - CORRECT ANSWERS ✔✔A. #1 tank
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|\ only


2. The Driver Vehicle Inspection Report (DVIR) should be
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submitted:
|\ A. according to the vehicle maintenance schedule
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|\ B. when a failure occurs
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|\ C. weekly
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|\ D. daily - CORRECT ANSWERS ✔✔D. daily
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3. Which of the following cannot cause a drum on an air-
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braked vehicle to overheat? |\ |\ |\




|\ A. an over-tightened brake adjuster at that wheel
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|\ B. under-adjusted brake(s) elsewhere on the vehicle
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,|\ C. too-high governor cut-out pressure
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D. driving downhill in too high a gear - CORRECT
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ANSWERS ✔✔C. too-high governor cut-out pressure |\ |\ |\ |\ |\




4. All the brakes drag on a truck with hydraulic brakes.
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Which of the following could be the cause?
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|\ A. air in the hydraulic system
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|\ B. too high a vacuum supply to the power brake booster
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|\ C. a leaking secondary cup in the master cylinder
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D. no brake pedal free travel - CORRECT ANSWERS ✔✔D.
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no brake pedal free travel
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5. Which of the following could cause a pulsating brake
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pedal on a truck with hydraulic brakes?
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|\ A. zero brake pedal free travel
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|\ B. glazed linings
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|\ C. an out-of-round brake drum
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D. a frozen wheel cylinder piston - CORRECT ANSWERS
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✔✔C. an out-of-round brake drum
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6. Air pressure gauges change an air pressure signal into
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an electronic voltage signal using which of the following
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components?
|\ A. inductor
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,|\ B. capacitor
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|\ C. transducer
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|\ D. regulator - CORRECT ANSWERS ✔✔C. transducer
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7. Technician A says that linings worn too thin on an air-
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braked vehicle can cause the S-camshaft to roll over.
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Technician B says this condition can cause excess brake |\ |\ |\ |\ |\ |\ |\ |\ |\



pedal travel. Who is right?
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|\ A. Technician A only
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|\ B. Technician B only
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|\ C. Both A and B
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D. Neither A or B - CORRECT ANSWERS ✔✔A. Technician
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A only
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8. Spring brakes on an air-braked vehicle must be able to
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hold the vehicle facing uphill or downhill on what percent
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grade?
|\ A. 10% |\




|\ B. 20% |\




|\ C. 30% |\




|\ D. 40% - CORRECT ANSWERS ✔✔B. 20%
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9. The driver of a truck with hydraulic brakes says the
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pedal reserve is too low. Technician A says the brakes
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, could be out of adjustment. Technician B says one brake
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system may have failed. Who is right? |\ |\ |\ |\ |\ |\




|\ A. Technician A only
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|\ B. Technician B only
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|\ C. Both A and B
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D. Neither A or B - CORRECT ANSWERS ✔✔C. Both A and
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B


10. The parking brakes fail to apply on a truck with air
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brakes. Technician A says this could be caused by low air
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pressure in the spring brake chamber. Technician B says
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this could be caused by a ruptured spring brake
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diaphragm. Who is right? |\ |\ |\




|\ A. Technician A only
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|\ B. Technician B only
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|\ C. Both A and B
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D. Neither A or B - CORRECT ANSWERS ✔✔D. Neither A
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or B |\




11. Technician A says the low-pressure warning indicator
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is located on the secondary reservoir tank. Technician B
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says the low-pressure warning indicator operates once
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system air pressure falls below 80 psi. Who is right?
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|\ A. Technician A
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|\ B. Technician B
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