Preventative maintenance inspection T8 exam 2
Answer A is correct. A defective voltage regulator causing a high-voltage regulator settings results and they overcharged battery.
1. All of the following may result in an undercharged battery EXCEPT: A. Adefective voltage regulator causing a high-votage regulator setting B. Excessive resistance between the alternator battery terminal andthe positive battery terminal. C. Loose or worn alternator drive belt. D. A 60-ampere fuse link installed in place of a 100-ampere fuse linkin the alternator battery wire.
Answer C is correct. Both technicians are correct. Semi-elliptical Springs are usually mounted with a pin and bushing to the spring hanger and the other end is free to move forward and backward compensate for changes in length . Multiple leaf springs should be replaced as an assembly.
10. Technician A says that multiple leaf springs should be replaced as an assembly. Technician B says that one end of Semi-elliptic Springs are free to move forward and backward. Who is correct?
Answer A is correct. Only technician A is correct. When 25 in. Hg air restrictions is reached, the element should be charged.
11. Technician A says that the air cleaner element should be replaced when 25N. Hg sir restrictions is indicated. Technician B says that regardless of the regulations, a truck must be serviced in the most cost effective manner to the owner. Who is correct?
Answer D is correct. The headlight alignment is changed by adjusting screws on the headlight assembly
12. When aiming Headlights with a headlight aligning screen: A. The vehicle does not need to be parallel to the aligning screen. B. The tire inflation pressure does not affect headlight alignment. C. The headlight alignment may be changed by installing new sealed beams. D. The headlight alignment is changed by turning at just screw on the headlight assembly.
Answer C is correct. Both technicians are correct. Technician performing refrigerant service must be certified to do so. A manifold gauge set is used to recycle, refrigerant, and diagnose A/C systems. The manifold gauge set is designed to access the refrigerant circuit and control refrigerant flow when adding or removing refrigerant. When the manifold test and control refrigerant flow when adding or removing refrigerant. When the manifold test that is connected into the system, pressure is registered on both of the gauges at all times. Make certain that both hand valves on the manifold gauge set are closed before connecting to the system to avoid releasing refrigerant or contaminating the system.
13. Technician A says that technician who perform mobile refrigerant system service must be certified. Technician B always make sure both hand valves on the manifold gauge are set closed before connecting the hoses to the vehicle. Who is correct?
Answer C is correct. The correct way to check engine mounts is to observe the engine and it's mounts while the engine is being torqued with its brakes applied.
14. How should a truck engine mount be dynamically checked? A. Visually inspect for cracks and/or deterioration. B. Correlating information from the driver and the vehicles maintenance history C. Observing the engine mounts while the engine is torqued with its brakes applied D. Automatically deadline a vehicle due to the driver suspicion
answer C is correct. Both technicians are correct A cracked fan blade may Cause a clicking or cracking noise with the engine idling. You should not stand or position your body in line with the fan while increasing the engine speed.
15. While checking fan blades, technician A says a cracked fan blade may cause a clicking or cracking noise while the engine is idling. Technician B says you could not stand or position your body in line with the fan while increasing the engine speed. Who is correct?
Answer B is correct. A cab air suspension system is shown in the illustration. While checking cab ride height, the truck should be on a level surface And the cab should appear to be level. Make sure system air pressure is at specify pressure before performing measurements. Use a tape measure to check cab ride height at the location specified by the manufacture. This is usually between the upper and lower plates. Compare readings with those specified by the manufacture and adjust the leveling valve as necessary.
16. How would suspension height of the illustration above most likely be checked? A. Measure drone the road surface to the lower plate. B. Measure between the upper and lower plates. C. Measure from the road surface to the upper plate. D. Measure the angle of the regulator valve arm.
Only technician B is correct. A smaller than specified air line slows the break application.
17. Technician A says a 45° elbow in an air brake line maybe replace with a 90° elbow without affecting break operation. Technician B says that if a trailer service system has an air fitting that is smaller then the original line; The air timing/balance is affective. Who is correct?
Answer D is correct. The push circuit raises the cab from the lower position to the desired till position. Remember that in most systems, whenever raising or lowering the cab, stop working the hydraulic pump once the cab goes over center. The cab falls at a controlled rate and continued Pumping could lock up the tilt cylinder. Inspect the hydraulic cylinder or external Leakage and determine if the cab can be raised and lowered. Check for internal leakage by observing bleed down. Make sure the mechanical stop in Gage and fold safely.
18. Which of the following does the push hydraulic circuit in a cab lift system do? A. Lowers the cab back from a fully extended position. B. Raises the cab from fully extended to the 45° tilt position. C. Allows a cab to dissent to the 60° overhead position. D. Raises the cab from the lower position to the desired tilt location.
Answer A is correct. Only technician A is correct. The pedal free travel should be about 1 1/2 to 2 inches the clearance insurance for clutch engagement, and no interference from the linkage should occur
19. When adjusting a clutch linkage, technician A says that the pedal free travel should be about 1 1/2 to 2 inches. Technician B says that release bearing to clutch break travel should be less than 1/2 inch. Who is correct?
Answer D is correct. Neither technician is correct the pressure drop on a straight truck is 4 psi in two minutes. The brake pedal must be held down for the two-minute test.
2. A technician is testing the low air pressure warning system on a truck by performing a pressure drop test on a straight single trucks air brake system. Technician A says that The pressure dropped should be no more than 6 PSI in two minutes. Technician B says you Hold down the brake pedal for the first minute then release it who is correct?
Answer B is correct. Only technician B is correct. The battery must be fully charged before check-in a circuit for current draw.
20. Technician A says an ohmmeter should be used to check for a short circuit between two circuits. Technician B says the battery must be fully charged before checking a circuit for current draw. Who is correct?
Answer D is correct. A frame has to be within manufacture specifications.
21. What is the least likely cause a vehicle wandering? A. Mismatch or under inflated tires. B. Unmatched spring design/load capacity spring assembly. C. Once or more broken spring leaves. D. Frame and alignment within manufacturers specification.
Answer C is correct. Both technicians are correct. A proper inspection of a heavy duty truck hydraulic brake system should include a visual of the wheel cylinder. Look for evidence of leaks on the inboard side of the tire and wheel. Leakage and contamination around the wheel cylinder generally indicates leakage in that repair are needed. Leaking wheel cylinders must be Reconditioned or replaced. Brake lines should be in good condition with no corrosion or damage that may compromise system performance. Leaking or damage brakes lines must be replaced.
22. Technician A says that when checking the condition of hydraulic oil drum brakes on a vehicle, to look for leakage and contamination around the wheel cylinder. Technician B inspects the brake line for Evidence of corrosion. Who is correct?
answer B is correct. The technician should check the affected circuit for a short to ground.
23. While checking fuses in a tractor/trailer, the technician find an open fuse. What is the next step? A. Replaced a fuse with the next higher - amperage fuse. B. Check that affected circuit for a short to ground. C. Check the affected circuit for an open. D. Install a circuit breaker of the same amperage as the fuse.
Answer A is correct. Each vehicle must carry proof that an inspection has completed. Proof can either be a copy of the inspection form kept on the vehicle or a decal. If using a decal, a copy of the inspection form must be kept on file.
24. The federal highway administration has set up a minimum inspection standard program. Technician A says that if a vehicle decal is used, a copy of the inspection form must be kept on file and should indicate where the inspector can get a copy of it. Technician B says that a tractor/trailer is considered to be on one vehicle, requiring only one decal. Who is correct?
Answer D is correct. 175° is the correct value. Most OEM truck manufacturers recommend checking the power steering fluid level at in operating or working temperature of 175°F. Where the engine at 1000 RPMs or less, turn the steering wheel slowly and completely in each direction several times to raise the fluid temperature. Check the reservoir for pho Minh as a sign of aerated fluid. The fluid level in the reservoir should be at the half full Mark on the dipstick.
25. Most vehicle manufacturers recommend checking the level of power steering fluid at which working temperature? A. 100° B. 140° C. 90° D. 175°
Answer B is correct. Only technician B is correct. The fuel injection system should be disabled and the engine Crank to read the voltage drop.
26. A high resistance is suspected in the starter motor ground circuit on a negative ground electrical system. Technician A says to connect the voltmeter leads from the starting motor housing to the positive terminal. Technician B says the fuel injection system should be disabled and the engine crank to read the voltage drop who is correct?
Answer A is correct. Only technician A is correct. A clutch brake needs to be inspected for where in fatigue. Warren clutch brake function surfaces can lead to clashing grinding when moving the gear lever into reverse or low gear while the vehicle is stationary.
27. Technician A says that a clutch brake needs to be inspected for wear and fatigue. Technician B says that providing the clutch brake drive lugs are in tact, it will always function properly. Who is correct?
Answer D is correct. Wires for a fusible link should be smaller than the circuit wire.
28. Wires for a fusible link should be: A. The same gauge size as the circuit wire. B. The same color as the circuit wire. C. To gauge size larger than the circuit wire. D. A smaller gauge size in the circuit wire.
Answer A is correct. An incorrect ratio will only affect the truck mileage and Pulling ability, not cause failure.
29. All of the following could cause a drive axle failure of a single drive axle vehicle except: A. Incorrect ratio. B. Normal wear. C. Lubrication failure. D. Fatigue.
Answer D is correct. Brakes are the highest cited area on a PMI. breaks Account for 25.9 percent Of maintenance concerns and top the list of maintenance concerns that leads site when asked to name the top five trailer maintenance problems.
3. What is the most likely sided maintenance item on a transport trailers? A. Tires B. Lights C. Suspension D. Brakes
Answer A is correct. Only technician A is correct. A cooling system pressure reading of 15 P.S.I is normal for pressure testing.
30. A cooling system is been pressure tested. Technician A says that a radiator pressure cap reading of 15 psi is normal. Technician B says that it is necessary to warm the engine to normal operating temperature before conducting a pressure test. Who is correct?
Answer D is correct. Neither technician is correct. The parking lights are part of the headlight circuit and work in conjunction with the headlight switch, as a result, failure of the switch will affect operation of the parking lights. The spotlights operate separately and will continue to operate.
31. The headlight switch has failed in the circuit shown in the illustration above, technician A says the parking lights are not affected. Technician B says the spot light will fail to operate. Who is correct?
Answer B is correct. Hydraulic assist back up system and associated warning devices should be checked during each vehicle inspection.
32. Technician A says that truck with hydraulic assist power brakes are not required to have a back up system. Technician B says that on systems that do incorporate a back up that the system should be checked during each inspection. Who is correct?
Answer C is correct. Both technicians are correct check in the operation of the clutch and the gearshift is part of a drive test during a PMI. When a drive test is performed, the speed at which the governor is there is always checked.
33. Technician A says that checking clutch operation and transmission shifting is part of a drive test during a preventative maintenance inspection. Technician B claims that when a drive test is performed, road speed governor actual speech should be checked. Who is correct?
Answer A is correct. The tractor Protection valve closes to protect the tractor air supply if the supply line pressure drops below 20 psi
34. The tractor protraction valve closes to protect the tractor air supply if the air pressure is in the supply line drops below what psi value? A. 20 psi B. 55 psi C. 75 psi D. 70 psi
Answer B is correct. Only technician B is correct. The vehicle can only be put out of service if the leaking exhaust fumes inter the driver/sleeper compartment or if they're likely to result in charring, burning, or damaging of the wiring, fuel supply or other combustible parts.
35. A heavy duty truck is found to have an exhaust leak. Technician A Intends to either repair it immediately or deadline the truck. Technician B says that the vehicle can only be put out of service if the leaking exhaust fumes inter the driver/sleeper compartment or if they are likely to result in chartering burning, or damaging of the wiring, fuel supply, or other combustible parts. Who is correct?
Answer D is correct. Neither technician is correct. Before performing a pressure-drop Test, the system must be as full pressure. Make and maintain a brake application. Allow pressure to stabilize for one minute, and then begin timing for two minutes while watching the dash gauges. A block of wood may be used to hold the brake pedal down during the pressure drop test.
36. In applying pressure drop test is being performed on a straight truck air brake system. Technician A says that the pressure drop should be no more than 6 PSI in two minutes. Technician B says you hold down the brake pedal for the first minute, and then release it. Who is correct?
Answer A is correct. A battery powered system is relatively trouble free and generally requires less maintenance then engine-bay systems.
37. When discussing auxiliary power unit (APU) maintenance, all of the following are true except: A. Battery powered systems are more maintenance intensive then engine-bay systems. B. On engine-bay systems, specified. Such as the radiator and condenser fans should be cleaned and/or inspected. C. On battery powered systems, a visual inspection should be performed as well as checking battery and connections. D. Manny APU failures can be traced to environmental factors such as vibration, corrosion Road spray, and extreme heat and cold.
Answer C is correct. Both technicians are correct. During a normal P.M.I an engine oil sample is taking for inspection of its overall lubrication qualities, plus medals and dirt content. This oil may also be tested for corrosion causing agents such as sulfuric and hydrochloric acid, and some esters.It is for this reason that the engine oil should be at normal operating temperature to ensure that all possible contaminants and corrosive be contained in the oil change at the normal operating condition. The oil sample should be taken during oil change at the midpoint of the Drainage. The last bottle should be clean before the sample, seal and label afterwards.
38. Technician A says an engine oil sample should be taken during every P.M.I. Technician B says to take an engine oil sample midway through the sump drain off. Who is correct?
Answer C is correct. Both technicians are correct. A circle inspection includes items such as torn mud flaps, leaking hoses, and outdated permits. Perform in a circle inspection first before any other inspection is part of the PMI.
39. Technician A says that a circle inspection includes items such as torn mudflaps, leaking hoses, and outdated permit. Technician B says to perform a circle inspection first before any other inspection as part of a P.M.I. Who is correct?
answer C is correct. Both technicians are correct. You connect the battery positive cable first when hooking up a battery. Always disconnect the ground cable first when disconnecting the battery.
4. Technician A says to connect the battery positive cable first when connecting a battery. Technician B says to disconnect the ground cable first when disconnecting the battery. Who is correct?
Answer C is correct. The vacuum reservoir is insufficient to permit one for break application after the engine is shut off.
40. A vehicle with vacuum-boost breaks is tagged out of service if in the vacuum system the: A. Vacuum never exceed 15 in. HG. B. Vacuum lines appear to be OK, but the engine lacks Performance. C. Vacuum lines reserve insufficient to premier one for break application after the engine is shut off. D. System vacuum bleed down over 50% after engine shuts off with in two minutes.
answer A is correct. Only technician is correct. You always lubricate the slack adjuster whenever an inspection of the breaks is scheduled. Slack adjusters are lubricated by grease or automatic lubricating systems. The seal in slack adjusters are always installed with the lip angle facing outward. When Grace is pumped into the slack adjuster, Kris exit easily pass the seals lip when the eternal lubrication circuit has been charged.
41. Technician A says the slack adjuster should be lubricated when brakes are applied. Technician B says that only the rear brake chamber pushrod have to be checked for stress cracks. Who is correct?
answer C is correct. Both technicians are correct. Maladjusted bearings fail rapidly? Especially when pre-loaded. The result of high preload on a bearing can be to friction weld it to the axle. All bearing manufactures in North America have endorsed the truck maintenance council method of adjusting tapered roller wheel bearings. The bearing and play must be measured with a dial indicator. They require specification is between 0.001 and 0.005 inch. And play must be present. If at least 0. 001 inch and play is not President, the adjustment procedure must be repeated.
42. While adjusting wheel bearings, technician A says that TMC wheel-end procedures should be followed at all times. Technician B Says that wheel bearing set with preload are likely to fail prematurely. Who is correct?
Answer D is correct. Neither technician is correct. It'll burn fusible link must be replaced with a length of the specified fusible link wire. A circuit breaker reset itself or can be reset and does not have to be replaced after repairing a short in the circuit.
43. Technician A says any Type of wire maybe use to replace a burn fusible link as long as the gauge is one size smaller than the wire in the circuit being protected. Technician B says that a circuit breaker should be replaced after repairing a short in the circuit who is correct?
Answer A is correct. Leaking, worn out front shock absorbers can cause the steering wheel to shake for a few seconds after a stretch of rough road.
44. After a stretch of rough road is driven, the steering will continue to shake for a few seconds. Which of the following would be the cause? A. Leaking from the shock absorbers. B. Low tire pressure. C. Rusted rear shock absorber. D. Missing jounce bumper.
Answer C is correct. 47 inches up for Cupler king pin plate height. This, plus the fact That any trailer operated on North America Rd. cannot exceed a height of 13 feet, 6 inches, determines the plate height of fifth wheels.
45. Which of the following is the standard fifth wheel plate height? A. 39 inches B. 43 inches C 47 inches D 49 inches
Answer A is correct. Only technician A is correct. A faulty voltage regulator may cause overcharging and low battery electrolyte.
46. A maintenance free battery is low on electrolytes in the built-in Hydrometer indicates yellow. Technician A says a faulty voltage regulator may cause this problem. Technician B said high resistance in the circuit between the alternator battery terminal and the positive terminal maybe the cause. Who is correct?
Answer A is correct. The stall test is a separate test use for testing other types of transmission problems not shift points.
47. On an automatic transmission, the following methods can be used for checking transmission shift points except: A. Stall test method. B. Speedometer readings. C. Test stand tail shaft speed. D. Engine RPM.
answer D is correct. Neither technician is correct failure of the outboard seal will allow Grease to enter the drum assembly and damage the drums and brake linings. Pressure lubricating equipment should be checked for proper operating and adjustment before use
48. A highway tractor is having a full P.M.I perform. Technician A says that outboard S-cam bushing should be pressure-lubricated until grace flows from the outboard seal. Technician B says to use the maximum pressure available form pressure lubricating equipment to aid in Flushing contaminants from lubricating components who is correct?
Answer B is correct. A thermostat that is stuck open does not cause excessive coolant level in the recovery reservoir.
49. In excess of high coolant level in The recovery reservoir may be caused by any of these problems except: A. Restricted radiator tubes. B. A thermostat that is stuck open. C. A blown head gasket. D. And in operative air operated cooling fan clutch.
Answer A is correct. A technician should move the handle to the fully applied position and record the air pressure.
5. What should a technician do when testing the operation of a trailer control valve? A. Move the handle to the fully applied position and record the air pressure. B. Drain the air system 20 psi, and then allow pressure to build up again. C. Record the gauge reading of the air pressure first, and then drain the system D. Listen for an air leak around the handle as the handle is moved to the applied position.
Answer A is correct. Only technician A is correct. Hub piloted wheels are less susceptible to loosening and crack then stud-plotted wheels. The hub piloted system simplifies centering in clamping wheels to the hub because the hub centers the wheel in the nuts and the studs provide only clamping force. The hub-piloted wheel uses one cap nut and eliminates the need for inner cap nuts.
50. Wheel assemblies are being discussed. Technician A says hub-piloted disc wheels Are less susceptible to loosening and cracking then stud-plotted wheels. Technician B says that disc wheels generally experience more alignment and balance problems then do Cast spoke designs. Who is correct?
Answer C is correct. A binding king pen thrust bearing or a failed power steering pump will cause excessive steering effort at all times. Out-of-adjustment steering gear puppets Will cost the steering to feel tight only at the end of the steering travel in either direction. A binding steering column U-joint Will cause the described symptoms.
51. The P.M.I technician notices that while turning right or left, the steering wheel becomes tight, then feels normal, then becomes tight again. Which of these could be the cause? A. Out-of-adjustment steering puppets. B. A binding king pin thrust bearing. C. A binding steering shaft U-joint. D. A failed power steering pump.
Answer B is correct. Streaks seen coming from the wheel studs and nuts can indicate undertorqued wheel Fasteners. The wheels should be removed for inspection to determine the extent of repairs needed.
52. During a P.M.I, The technician finds rust streaks coming from the wheel studs and nuts. The proper procedure is to: A. Re-tighten All of the wheel nuts and paint the rust spots. B. Remove the wheels and inspect the rims studs for Serviceability. C. Tighten the wheel nuts with an impact tool. D. Clean all the wheel studs in apply anti-rust lubricant.
Answer A is correct. When a shock absorber is functioning properly, heat is generated from the work it performs while dampening the suspension travel. So after a truck has been driven, the shock should be warm to the touch. A cold shock absorber indicates that it is not performing any work.
53. A P.M.I is being performed on a truck that has just come off the road. Technician notices that one shock absorber on the front axle is warm and the other is cold. This indicates that the: A. Cold shock absorber is not functioning. B. Warm shock absorber is not functioning. C. Truck was loaded unevenly. D. Truck has weak Springs.
Answer D is correct. A misadjusted air ride suspension leveling valve could cause incorrect driveline angles, which could result in repeated U joint failures.
54. During a P.M.I On a truck equipped with air ride suspension, it is discovered that the rear U-joint have excessive wear. A review of past repairs orders show that the unit has a history of U-joint failures. Which of these could be the cause? A. A week shock Absorber. B. Excessive air system pressure C. A misadjusted cab air-ride suspension. D. A misadjusted air ride suspension leveling valve.
Answer D is correct. A center support bearing is shown. Center support bearings are used when the distance between the transmission and the rear axle is too great to span with a single driveshaft. The center bearing is fastened to the frame and the lines the To connecting driveshaft. It consist of a stamped steel bracket used to align and fastened the bearing to the frame. A rubber mount inside the bracket surrounds the bearing, which supports the driveshaft.
6. What is this component shown in the illustration? A. A one-way clutch. B. A vertical yoke support. C. An exhaust pipe support. D. A center bearing support.
Answer B is correct. You should always check the PVC Valve when an inspection of the E Mission control system is performed. The PC V system requires service at regular intervals to ensure that the system operates properly. Sludge in carbon can plug the PCV valve. Service the PCV Valve system hoses for cracks and deterioration. Regular maintenance should be included cleaning the PC V valve with a carburetor or fuel injector cleaner.
7. When checking the emission control system of a gasoline-fueled truck, always test: A. The carburetor fuel inlet line. B. The positive crankcase ventilation(PVC) valve. C. The air cleaner vacuum hose. D. The intake manifold service port.
Answer C is correct. When the passenger side wiper blade is cracked and badly worn, the vehicle should not be tagged out of service.
8. A roadside inspection is being performed while it is raining. All of the following effects would be a reason to tag the vehicle out of service EXCEPT: A. A wiper blade on the drivers side is cracked and badly worn. B. The wiper motor is inoperative. C. The passenger side wiper blade is cracked in badly worn. D. The driver side wiper arm is distorted so the blade does not contact the windshield properly.
Answer B is correct. The test shown in the illustration is a battery capacity test.
9. In the illustration, which test is being performed? A. A battery drain test B. A battery capacity test C. A battery open circuit voltage test D. A starter current draw test
