Clogged Diesel Particulate Filter Quiz

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Questions and Answers

  1. Which of the following issues is caused by a clogged diesel particulate filter?

  • a) Excessive tailpipe temperatures.
  • b) DPF inlet temperature sensor failure.
  • c) EGR valve failure.
  • d) Excessive exhaust system backpressure. (correct)

  1. What kind of thread is included on every acetylene fitting?

  • a) metric
  • b) pipe
  • c) left handed (correct)
  • d) right handed

  1. What would a faulty temperature sensor for the coolant do?

  • a) can cause drivability and gas mileage problems (correct)
  • b) always prevent the car from starting.
  • c) always set a code.
  • d) None of the above

  1. Referring to the diagram below, how many times will the smaller gear rotate for every four rotations of the larger gear?

<p>8 (B)</p> Signup and view all the answers

  1. What component prevents the battery from being overcharged? a) the lead

<p>c) voltage regulator (B)</p> Signup and view all the answers

  1. What safety measures must be taken while installing an instrument cluster?

<p>b) Install a static strap then remove cluster from the anti-static bag. (B)</p> Signup and view all the answers

  1. In relation to a cooling system with a 100kPa or 15psi radiator pressure cap has raised the coolant boiling point to which of the following?

<p>c) 125C (C)</p> Signup and view all the answers

  1. This symbol appears on a product that you intend to purchase. What personal protection equipment do you anticipate wearing?

<p>d) Chemically resistant gloves, apron and a face shield (D)</p> Signup and view all the answers

  1. What is a fire of class "C"?

<p>b) electrical equipment, motors, switches (B)</p> Signup and view all the answers

  1. When the compensator setting is achieved on a pressure-compensating hydraulic pump, the pump volume will?

<p>d) Be reduced to only what the system needs (D)</p> Signup and view all the answers

  1. What precautions must be taken while utilising a hoist to lift a car with air suspension?

<p>d) Disable the air suspension system (D)</p> Signup and view all the answers

  1. What should a motorist do while stopped on an incline going uphill?

<p>b) apply the hand brake (B)</p> Signup and view all the answers

  1. What must be done when both the air bag light and the MIL light are illuminated?

<p>a) Diagnose the air bag light first. (A)</p> Signup and view all the answers

  1. Which procedures should be followed to guarantee a successful transfer case repair?

<p>b) Isolate and repair the problem, and verify the repair. (B)</p> Signup and view all the answers

  1. With a cylinder leakage tester, 120 psi of air pressure is supplied into the spark plug aperture, and air can be heard leaking from the oil fill orifice in the camshaft cover. Which of the following is a potential cause?

<p>b) broken piston rings (B)</p> Signup and view all the answers

  1. Estimating the state of charge of a sealed battery based on its open-circuit voltage. A fully charged battery that has been sitting for many hours will have a minimum open-circuit voltage of?

<p>c) 12.6 volts. (C)</p> Signup and view all the answers

  1. What colours do the emergency and service lines have?

<p>c) red and blue (C)</p> Signup and view all the answers

  1. If a universal joint bearing cup fails to purge, which of the following should be done?

<p>a) Release seal tension, then apply grease. (A)</p> Signup and view all the answers

  1. What is indicated when the ambient air temperature is 21 degrees Celsius and the refrigerant pressure in the storage container is 78 pounds per square inch?

<p>c) Refrigerant is a contaminated (C)</p> Signup and view all the answers

  1. When connecting the grease gun to the fitting?

<p>b) Place on angle and roll on. (B)</p> Signup and view all the answers

  1. On the nameplate of a motor or motorcompressor, which of the following will indicate that the motor is equipped with a thermal protector?

<p>a) Thermally Protected (A)</p> Signup and view all the answers

  1. When doing an emission test, excessive levels of CO and HC are detected. Which test would validate a catalytic converter's probable defect?

<p>c) Outlet temperature would be notably higher than inlet temperature (C)</p> Signup and view all the answers

  1. What is the maintenance interval for bearings with conventional fittings or prepackaged bearings?

<p>b) Much longer for pre-packed bearings. (B)</p> Signup and view all the answers

  1. What is the primary cause of an alternator output current of 0 amps?

<p>a) an open rotor winding (A)</p> Signup and view all the answers

  1. How do you fix an electronically controlled automatic transmission that refuses to move into second gear?

<p>b) Follow the correct diagnostic procedure using hydraulic diagrams. (B)</p> Signup and view all the answers

  1. Which of the following would result in a type one circuit breaker cycling on and off repeatedly?

<p>c) increase in current flow due to a short circuit. (C)</p> Signup and view all the answers

  1. The antilock brake system amber light does not go off after the engine is started. Technician 1 says a parking brake not fully released could be the cause. Technician 2 says when this happens the brakes will operate like a normal non- ABS brake system. Which tech is correct?

<p>a) tech 2 (A)</p> Signup and view all the answers

  1. What are the three distinct air brake systems: service, parking, and...

<p>c) emergency brakes (C)</p> Signup and view all the answers

  1. Which of the following would be the first step in diagnosing a problem with an electro-hydraulic control system that employs an ECU to regulate hydraulic circuit operation?

<p>c) Check for diagnostic trouble codes. (C)</p> Signup and view all the answers

  1. How should the safety of the tractor-trailer link be tested?

<p>a) Pull gently forward in low gear against the locked trailer brakes, then look at it carefully. (A)</p> Signup and view all the answers

  1. The gauge set shows intermittently high and low side pressure gauge readings and the high side intermittently drops to 100psi. Which of the following is the most likely cause when diagnosing the intermittent AC cooling system?

<p>d) stuck expansion valve (D)</p> Signup and view all the answers

  1. What does Flash burn refer to?

<p>a) burn to the eye caused by exposure to ultraviolet light from the welding arc (A)</p> Signup and view all the answers

  1. Excessive amperage draw and sluggish cranking speed suggest which of the following?

<p>c) High mechanical resistance. (C)</p> Signup and view all the answers

  1. Leaks in engine oil are often detected by adding fluorescent dye to the oil and using which of the following?

<p>b) black light (B)</p> Signup and view all the answers

  1. What testing techniques must be conducted prior to concluding that an automatic gearbox requires a comprehensive overhaul?

<p>b) Check fluid levels, pressure test and then inspect pan deposits. (B)</p> Signup and view all the answers

  1. After a vehicle's issue codes have been obtained, in what sequence is the diagnostic performed?

<p>c) Record the codes and consult freeze frame data (C)</p> Signup and view all the answers

  1. When the armature of a starter makes contact with the field winding, what is the cause?

<p>a) armature swelling (A)</p> Signup and view all the answers

  1. Following the installation of a new accessory belt, you must?

<p>c) check belt tension after running engine (C)</p> Signup and view all the answers

  1. The ignition coil's main winding is electrically coupled to the battery through the?

<p>d) distributor contact points (D)</p> Signup and view all the answers

  1. What is the name for the memory in a vehicle's computer that stores information that tailors the computer to the vehicle?

<p>c) programmable read only memory (C)</p> Signup and view all the answers

  1. Which of the following components cannot be removed from a transmission/transaxle prior to removing it from a vehicle?

<p>b) front bearing retainer (quill) (B)</p> Signup and view all the answers

  1. The vapour return line's function is to return vapour from the?

<p>c) fuel pump to the fuel tank (C)</p> Signup and view all the answers

  1. What pollutant is produced by high temperatures during combustion?

<p>d) NOx (D)</p> Signup and view all the answers

  1. What is the function of the PCV valve in a running engine?

<p>a) closes as engine speed increases (A)</p> Signup and view all the answers

  1. What is the last stage before a vehicle is returned to service?

<p>d) update vehicle service records (D)</p> Signup and view all the answers

  1. Even without an exterior breach, coolant is being lost. How would you address this issue?

<p>b) Drain oil, pressurize drainage system, and check for coolant leaks at drain plug (B)</p> Signup and view all the answers

  1. A car is brought in with shifting issues, especially in first gear. Technician 1 believes that the first speed-blocking ring is to blame. Technician 2 believes the clutch may be improperly adjusted. Which technology is best?

<p>a) tech 2 (A)</p> Signup and view all the answers

  1. During engine idle, what stops excessive air flow via the intake manifold?

<p>a) PCV (A)</p> Signup and view all the answers

  1. What should be done once a power steering hose has been replaced?

<p>a) Bleed the system by turning the steering wheel from one stop to the other (A)</p> Signup and view all the answers

  1. Which of the following would result in a high temperature measurement on a rear axle's input pinion after overhaul?

<p>a) Excessive pinion bearing preload (A)</p> Signup and view all the answers

  1. The thrust angle is +0.7 degrees when a non-centered steering wheel is detected by a technician. There is outside tire wear on the right rear tire. What is the origin?

<p>a) There are bent components in the right rear suspension. (A)</p> Signup and view all the answers

  1. Which of the following is the most probable reason if a gearbox may be simultaneously changed into two gears?

<p>d) faulty interlock (D)</p> Signup and view all the answers

  1. Which of the following would cause a hydraulically operated automatic gearbox to shift too quickly from first to second while all other shift points are normal?

<p>a) Spring tension at the 1-2 shift signal valve is too low. (A)</p> Signup and view all the answers

  1. Exhaust gas contains?

<p>d) all of the above (D)</p> Signup and view all the answers

  1. On a vehicle with floating single-piston caliper disc brakes, the disc brake pad between the caliper piston and rotor is severely worn. The opposite brake pad has little wear. Technician 1 suggests that high rotor runout may be the culprit. Technician 2 speculates that inadequate clearance between the pads and caliper slider may be the problem. Which technology is best?

<p>a) tech 2 (A)</p> Signup and view all the answers

  1. What are the two types of gasoline gauges?

<p>c) magnetic and thermostatic (C)</p> Signup and view all the answers

  1. Which of the following would be the source of the issue when the transmission shifts harshly, the input bearing is loud, and the unit has had many clutch failures?

<p>d) Clutch housing alignment. (D)</p> Signup and view all the answers

  1. How can you determine whether the automatic leveling function of a vehicle's suspension has failed? Which method will identify the issue?

<p>b) Install a scan tool and then check for communication among the control modules. (B)</p> Signup and view all the answers

  1. What is the problem if the engine stops when the ignition switch is returned to the run position after starting?

<p>d) cap and rotor (D)</p> Signup and view all the answers

  1. On an onboard diagnostic system, what does it mean if the values from the upstream and downstream oxygen sensors are identical?

<p>a) Defective catalyst (A)</p> Signup and view all the answers

  1. Which of the following is the concluding step when installing a torque converter on a transmission?

<p>d) Engaging the pump impeller with the shaft. (D)</p> Signup and view all the answers

  1. Regarding snap rings utilised in manual transaxles, technician 1 believes that certain main shafts use snap rings as a selective fit. Technician 2 believes that the correct side of the snap ring should always be facing up so that the snap ring pliers may be used. Which technology is best?

<p>c) both techs (C)</p> Signup and view all the answers

  1. When the air-fuel combination ignites before the spark plugs, this phenomenon is known as?

<p>d) pre-ignition (D)</p> Signup and view all the answers

  1. How do you fix a steering issue that is loud and stiff after replacing a deployed air bag?

<p>c) Replace collapsed column (C)</p> Signup and view all the answers

  1. What is the correct method for cleaning seatbelt webbing?

<p>c) Use only a mild soap and water solution and a soft brush or cloth, then air dry (C)</p> Signup and view all the answers

  1. Which of the following tests is performed prior to removing a clogged heater core?

<p>c) Compare the inlet and outlet temperatures. (C)</p> Signup and view all the answers

  1. What is the last inspection after repairing a torque converter for an automatic transmission?

<p>d) leak test (D)</p> Signup and view all the answers

  1. How is a diesel fuel engine system that has a leak on the main side inspected?

<p>c) add minimal pressure to fuel tank and check line for leaks with soap water (C)</p> Signup and view all the answers

  1. Technician 1 believes that while removing an axle drive shaft from a vehicle with a transaxle, match markings should be put on the drive shafts to eliminate vibrations following reassembly. Technician 2 believes that if the car is moved while the drive shafts are being removed, the front wheel bearings might be destroyed. Which technology is best?

<p>a) tech 2 (A)</p> Signup and view all the answers

  1. Which of the following knots is used to affix two lines of the same diameter together so that they do not slip?

<p>c) Reef (C)</p> Signup and view all the answers

  1. How is an ammeter connected to an electrical circuit?

<p>d) in series with load (D)</p> Signup and view all the answers

  1. After shifting into drive, it takes a time for the vehicle to begin moving. Which would result in this issue?

<p>c) partially plugged screen (C)</p> Signup and view all the answers

  1. What is the correct technique for installing a new or remanufactured turbocharger?

<p>a) Inspect air filter and pre-lubricate turbo with clean engine oil. (A)</p> Signup and view all the answers

  1. Which of the following issues is caused by a clogged diesel particulate filter?

<p>d) Excessive exhaust system backpressure. (D)</p> Signup and view all the answers

  1. When the engine is started with the brakes engaged on a car with power brakes, the brake pedal glides down somewhat. Technician 1 suggests that a leaky power brake booster diaphragm may be the problem. Technician 2 suggests that a trapped closed residual check valve in the pipe connecting the intake manifold to the power brake booster might be the problem. Which technology is best?

<p>d) neither techs (D)</p> Signup and view all the answers

  1. What causes constant U-joint failure at low mileage?

<p>a) high speed, high angle operation (A)</p> Signup and view all the answers

  1. Which of the below would result in a heavy heel pattern on a hypoid gear set?

<p>c) Backlash is excessive. (C)</p> Signup and view all the answers

  1. How is a shortage of airflow in the air conditioning system diagnosed?

<p>a) Inspect the cabin air filter (A)</p> Signup and view all the answers

  1. What might cause choppy engine idle and stalling in the EGR system?

<p>d) any of the above (D)</p> Signup and view all the answers

  1. Which of the following would cause a U-joint to continually deteriorate and exhibit brinelling?

<p>c) Insufficient driveline working angle. (C)</p> Signup and view all the answers

  1. A radiator cap on a car at 3000 feet above sea level can only hold 1.5 psi of pressure. At what temperature will a 50/50 mixture of the coolant boil?

<p>a) 107deg C (A)</p> Signup and view all the answers

  1. When doing a vacuum booster function test, the first step is to repeatedly press the brake pedal using which of the following?

<p>a) engine off (A)</p> Signup and view all the answers

  1. To reverse spinning of a capacitor-start motor, you must reverse which of the following?

<p>b) connection to the capacitor (B)</p> Signup and view all the answers

  1. What are the potential reasons of a discharged or low battery?

<p>d) all of the above (D)</p> Signup and view all the answers

  1. What does an uncontrolled fuel tank exhale?

<p>c) temperature changes (C)</p> Signup and view all the answers

  1. Which of the following is the proper method for connecting an ammeter to a circuit?

<p>b) series (B)</p> Signup and view all the answers

  1. Which of the following should be carried out while changing a clutch?

<p>d) Check bell housing alignment before installing clutch assembly. (D)</p> Signup and view all the answers

  1. Which change is most likely to repair a car in park that rolls continuously?

<p>b) Gear shift linkage (B)</p> Signup and view all the answers

  1. Reducing an engine's compression ratio decreases combustion temperature and what else?

<p>d) Reduces the amount of NOx found (D)</p> Signup and view all the answers

  1. What effects might a clogged PCV valve have?

<p>d) all of the above (D)</p> Signup and view all the answers

  1. What causes significant tire squeal during average-speed bends if all alignment modifications are within specifications?

<p>b) Under inflated tires (B)</p> Signup and view all the answers

  1. What must be performed prior to decoupling an air-ride tractor from its trailer?

<p>b) deflate air suspension (B)</p> Signup and view all the answers

  1. Which of the following would reduce the heater core's output?

<p>b) Low coolant level. (B)</p> Signup and view all the answers

  1. Carburetors have been adjusted to give a cleaner air-fuel combination during what to manage the air-fuel-air mixture and decrease atmospheric pollution?

<p>b) idling (B)</p> Signup and view all the answers

  1. How would you identify a vacuum leak on an air conditioning control system?

<p>b) trace the origin of the hissing sound (B)</p> Signup and view all the answers

  1. Which technique is used to examine an air conditioning (AC) system for leaks using dye?

<p>c) Ultraviolet light inspection. (C)</p> Signup and view all the answers

  1. What is the name of the equipment that can simulate a driving test in the store?

<p>c) dynamometer (C)</p> Signup and view all the answers

  1. Why is it important to wait after deactivating the high voltage system on a hybrid car before servicing the system?

<p>d) To allow the capacitors to dissipate (D)</p> Signup and view all the answers

  1. When removing rear wheel hubs, what is done if the axle cannot be extracted?

<p>c) inspect wheel bearing adjustment (C)</p> Signup and view all the answers

  1. What should the temperature of an aluminum cylinder head be prior to removing the spark plugs?

<p>b) Ambient (B)</p> Signup and view all the answers

  1. When the brake is applied after a remote start on a remote starting system, what prevents the engine from turning off?

<p>b) Defective stop lamp switch (B)</p> Signup and view all the answers

  1. Which of the following would not result in a change in vent temperature when switching the thermostat from hot to cold?

<p>d) Improper heater valve adjustment. (D)</p> Signup and view all the answers

  1. What causes a hissing sound and a high pedal position when braking that appears to emanate from the pedal?

<p>d) Brake booster vacuum valve is leaking. (D)</p> Signup and view all the answers

  1. In what range do the majority of engine bearing clearance standards fall?

<p>0.025-0.075inch (C)</p> Signup and view all the answers

  1. During the maintenance of a clutch with hydraulic control, which of the following must be replaced?

<p>a) clutch fluid (A)</p> Signup and view all the answers

  1. Controlling the combustion, the air-fuel ratio, and? are three methods for cleaning exhaust gas.

<p>c) treat the exhaust gas (C)</p> Signup and view all the answers

  1. Technician 1 believes that drive shafts on front-wheel-drive automobiles are often removed with a pry bar or a special puller. Technician 2 believes that the axle nuts on a car with front-wheel drive are not reusable. Which technology is best?

<p>c) both techs (C)</p> Signup and view all the answers

  1. If a universal joint bearing cup fails to cleanse, which of the following should be done?

<p>a) Release seal tension, then apply grease. (A)</p> Signup and view all the answers

  1. Which of the following is a benefit of two-part epoxy primers?

<p>a) provide corrosion protection close to OEM E coat (A)</p> Signup and view all the answers

  1. How should an exhaust gas recirculation (EGR) valve be inspected?

<p>d) Energize valve and check engine idle quality. (D)</p> Signup and view all the answers

  1. What procedures are performed during a road test of a diesel engine to certify low power?

<p>d) boost and fuel pressure (D)</p> Signup and view all the answers

  1. What precautions are taken to prevent flame flanges from collapsing during U-bolt installation?

<p>d) install steel blocks in the frame flanges (D)</p> Signup and view all the answers

  1. How is the functionality of the antilock relay valve tested?

<p>c) install a tee fitting at the ARV service port and at one delivery port, and install a gauge in each (C)</p> Signup and view all the answers

  1. What are the two types of fuel systems for engines with spark ignition?

<p>b) carburetor and fuel injection (B)</p> Signup and view all the answers

  1. A vehicle's transversely placed, front-wheel-drive engine must be removed. All of the following are often advised except?

<p>b) removing the differential gears (B)</p> Signup and view all the answers

  1. What steps must a technician do for a diagnostic monitor to operate?

<p>d) Insure that the enable criteria will be satisfied then perform the drive cycle and monitor the readiness status until complete (D)</p> Signup and view all the answers

  1. How does one test the pickup coil in an electronic ignition system?

<p>b) check resistance with an ohmmeter (B)</p> Signup and view all the answers

  1. After removing an injector, what action is taken if engine oil is discovered to be diluted with fuel?

<p>a) pressure test fuel gallery and check for leaks (A)</p> Signup and view all the answers

  1. What is the proper procedure for fixing damaged computer wiring?

<p>a) Secure the wires by twisting and then use a heat sink when soldering the wire (A)</p> Signup and view all the answers

  1. How should the expansion pellet be placed while changing a thermostat for engine coolant?

<p>b) Towards the engine block. (B)</p> Signup and view all the answers

  1. What will cause a seat belt to seem unfastened and allow a passenger to fly forward in a mild collision?

<p>a) Seat belt retractor has failed (A)</p> Signup and view all the answers

  1. A code for a coolant sensor is kept. A DVOM reveals 0 volts on the sense line circuit of the coolant temperature sensor. This might be caused by a defective connection or an open in the sense line. How should we test this?

<p>a) Disconnect the sensor, jump the terminals then watch the scan tool for a high temperature reading. (A)</p> Signup and view all the answers

  1. What is the maximum permissible voltage drop across the ground circuit of the starting system?

<p>0.2 (A)</p> Signup and view all the answers

  1. What may be the reason if the fuel pump continues to operate after the ignition key has been removed?

<p>b) Fuel pump relay contacts stuck close (B)</p> Signup and view all the answers

  1. What is the maximum safe operating pressure for welding using acetylene gas?

<p>15 psi (B)</p> Signup and view all the answers

  1. What causes a truck's front crankshaft seal to fail?

<p>b) breather filter is clogged (B)</p> Signup and view all the answers

  1. What is done if oil pressure fluctuates?

<p>a) check engine oil level and check pressure with gauge (A)</p> Signup and view all the answers

  1. What are the methods for servicing an air tank with considerable oil and water buildup?

<p>d) Repair compressor and replace the air dryer (D)</p> Signup and view all the answers

  1. The recommended ratio for replacing engine coolant with normal antifreeze is?

<p>d) 50% water, 50% antifreeze (D)</p> Signup and view all the answers

  1. What may be causing a vehicle's soft, pushy pedal?

<p>d) air in the system (D)</p> Signup and view all the answers

  1. Which of the actions below would a technician do to correct bearing endplay on a transfer case?

<p>c) Measure endplay with a dial indicator and calculate shim pack. (C)</p> Signup and view all the answers

  1. What is the issue if the output of a single alternator wire displays 12 volts and 0 amps while a 1000RPM engine is operating?

<p>d) faulty voltage regulator (D)</p> Signup and view all the answers

  1. What should oil holes in the bearing shells of the main bearings be?

<p>b) faces the block (B)</p> Signup and view all the answers

  1. What is this graphic?

<p>d) Fillet weld contoured with a grinder (D)</p> Signup and view all the answers

  1. What will cause an onboard diagnostic vehicle's malfunction indication light to flash?

<p>a) Cylinder misfire (A)</p> Signup and view all the answers

  1. When a shift valve in an automatic gearbox that is hydraulically controlled fails to open, what is the reason of this issue?

<p>c) Governor pressure is less than throttle pressure and spring force combined (C)</p> Signup and view all the answers

  1. Which of the following factors may contribute to a vehicle's excessive lean during turns?

<p>d) all of the above (D)</p> Signup and view all the answers

  1. What modifications are made to the engine's oil cooler when a connecting rod bearing fails?

<p>c) replace core assembly (C)</p> Signup and view all the answers

  1. When attached to an engine, what does a tachometer measure?

<p>a) engine speed (A)</p> Signup and view all the answers

  1. A 12V battery with a cold-cranking amp rating of 600 requires a load of 300What is the minimum permissible voltage measurement after 20 seconds?

<p>b) 9.6 V (B)</p> Signup and view all the answers

  1. Which of the following is the most common complaint for a transmission case, centre adapter plate, or rear extension housing mating surface that has been damaged?

<p>c) Oil leak (C)</p> Signup and view all the answers

  1. What does Flash burn refer to?

<p>a) burns the eyes caused by exposure to ultraviolet light from the welding arc (A)</p> Signup and view all the answers

  1. The distributor shaft is propelled by?

<p>b) gears on the shaft and the camshaft (B)</p> Signup and view all the answers

  1. A client complains about pedal pulsation and vibration during strong braking in an ABS-equipped car. The pedal is often elevated and firm. The car comes to a smooth halt with little braking. What is the difficulty?

<p>d) The ABS brakes are operating normally. (D)</p> Signup and view all the answers

  1. What is the main voltage of a transformer with 750 primary turns and 400 secondary turns when the secondary voltage is 240V?

<p>450 (A)</p> Signup and view all the answers

  1. Which process should be followed while fixing a protected wire harness with twisted conductors?

<p>d) Twist wires, solder and seal connections, and re-shield harness (D)</p> Signup and view all the answers

  1. When the air conditioning system begins functioning regularly, the vent temperature gradually begins to rise. Which of the following is the most significant issue?

<p>b) Thermostatic switch stuck close (B)</p> Signup and view all the answers

  1. Which of the following is an overhead crane wire rope that is flexible?

<p>13667 (A)</p> Signup and view all the answers

  1. What is a potential reason when oil is discovered in the secondary reservoir?

<p>c) air compressor (C)</p> Signup and view all the answers

  1. What is the most probable reason of a transfer case that will not shift from low gear ratio to direct drive or 1:1 ratio?

<p>a) broken shift shaft (A)</p> Signup and view all the answers

  1. What are the two varieties of electric fuel pumps?

<p>a) in line and in tank (A)</p> Signup and view all the answers

  1. What precautions must be taken while utilising a hoist to lift a car with air suspension?

<p>d) Disable the air suspension system (D)</p> Signup and view all the answers

  1. Technician 1 believes that an inappropriate rear "U" joint working angle will produce a vibration at high speeds. Technician 2 believes that a squeaking noise in reverse is caused by a worn bearing surface on the cross shaft. Which technology is best?

<p>c) both techs (C)</p> Signup and view all the answers

  1. The mechanism for controlling fuel vapour emissions stores gasoline vapour in?

<p>b) charcoal canister (B)</p> Signup and view all the answers

  1. The ignition coil possesses?

<p>a) two windings (A)</p> Signup and view all the answers

  1. What is detached prior to removing a steering column assembly with an air bag?

<p>a) Battery negative cable for a sufficient amount of time (A)</p> Signup and view all the answers

  1. How would compression be checked on a diesel engine?

<p>c) the glow plug opening (C)</p> Signup and view all the answers

  1. When removing a cylinder head, the bolts/nuts should be loosened in which of the following orders?

<p>b) the reverse order of assembly (B)</p> Signup and view all the answers

  1. The piston of a cylinder leakage tester exerts air pressure to the cylinder.

<p>c) at TDC and both valves closes (C)</p> Signup and view all the answers

  1. What causes a strong smell of fuel?

<p>d) all of the above (D)</p> Signup and view all the answers

  1. When repairing a faulty clutch pressure plate, should another component also be replaced?

<p>a) clutch disk (A)</p> Signup and view all the answers

  1. What do we term the ease with which gasoline evaporates?

<p>a) volatility (A)</p> Signup and view all the answers

  1. Which of the following is the primary objective of creating a rear end gear tooth contact pattern?

<p>c) pinion depth (C)</p> Signup and view all the answers

  1. What does the acronym MIG mean?

<p>b) metallic-inert gas (B)</p> Signup and view all the answers

  1. Typically, oil pressure checks are conducted at idle and what RPM?

<p>2500 (A)</p> Signup and view all the answers

  1. If the exhaust gas contains little oxygen, what is the air-fuel ratio?

<p>a) Rich (A)</p> Signup and view all the answers

  1. Technician 1 explains that, during the vacuum supply test, the vacuum supply hose is inspected for kinks. Technician 2 explains that the test entails measuring the amount of suction produced by the engine or vacuum pump. Which technology is best?

<p>c) both techs (C)</p> Signup and view all the answers

  1. What is the technique for evaluating the tension of auxiliary drive belts?

<p>d) Lay a straight edge across 2 pulleys, push and measure belt deflection (D)</p> Signup and view all the answers

  1. What causes an automatic transmission's low stall speed?

<p>c) freewheeling stator (C)</p> Signup and view all the answers

  1. Which of the following is the first stage in removing refrigerant from an air conditioning system?

<p>a) Identify the type of refrigerant. (A)</p> Signup and view all the answers

  1. Which of the following causes the engine's oil to circulate?

<p>d) sump to oil pump to filter, to crankshaft and main bearings, to pistons, to camshaft, valves and valve springs then back to sump. (D)</p> Signup and view all the answers

  1. What should be done if a PCV valve fails?

<p>a) replace PCV valve (A)</p> Signup and view all the answers

  1. A vehicle's pedal travel is considerable before the brakes engage. Technician 1 reports that the pushrod setting of the master cylinder is improper. Technician 2 asserts that a malfunctioning residual pressure check valve allowing air in is to blame. Which technology is best?

<p>b) tech 1 (B)</p> Signup and view all the answers

  1. Which of the following should be used to measure the piston ring end caps on a worn cylinder?

<p>c) the bottom of the cylinder (C)</p> Signup and view all the answers

  1. The function of the fuel vapour return line is to return any vapour to the fuel tank.

<p>d) develops in the fuel pump (D)</p> Signup and view all the answers

  1. What is one approach for lowering NOx in exhaust gas?

<p>a) increase valve over lap (A)</p> Signup and view all the answers

  1. How is a shuddering situation repaired during torque converter lock up?

<p>b) replace the torque converter (B)</p> Signup and view all the answers

  1. When oil is discovered in the cooling system, how is the source of contamination determined?

<p>c) remove oil cooler and pressure test (C)</p> Signup and view all the answers

  1. If the steering column input shaft is not properly aligned, there will be noise, according to technician 1. If the lubricant level is extremely low in a linkage- assist type power steering column, there will be noise while moving the steering wheel, according to Technician 2. Which technology is best?

<p>c) both techs (C)</p> Signup and view all the answers

  1. Which of the following must be done before opening a connection in the sensor harness of an electronic control system?

<p>a) Ensure the key switch is turned off. (A)</p> Signup and view all the answers

  1. How should tanks of oxyacetylene be stored?

<p>c) capped and chained vertically (C)</p> Signup and view all the answers

  1. What are the two components of the fuel system that expel gasoline vapour from the charcoal canister?

<p>a) carburetor and fuel tank (A)</p> Signup and view all the answers

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Study Notes

Diesel Particulate Filter

  • A clogged diesel particulate filter causes issues.

Acetylene Fittings

  • Every acetylene fitting includes a left-hand thread.

Temperature Sensor

  • A faulty temperature sensor for the coolant causes issues.

Gear Rotation

  • The smaller gear rotates a certain number of times for every four rotations of the larger gear.

Battery Protection

  • The component that prevents a battery from being overcharged is not the lead.

Instrument Cluster Installation

  • Safety measures must be taken while installing an instrument cluster.

Cooling System

  • A radiator pressure cap of 100kPa or 15psi raises the coolant boiling point.

Personal Protection Equipment

  • The symbol on a product indicates the need to wear personal protection equipment.

Fire Classification

  • A class "C" fire is a specific type of fire.

Hydraulic Pump

  • When the compensator setting is achieved on a pressure-compensating hydraulic pump, the pump volume will change.

Air Suspension Safety

  • Precautions must be taken while using a hoist to lift a car with air suspension.

Uphill Safety

  • Motorists should take specific actions when stopped on an incline going uphill.

Air Bag and MIL Lights

  • Specific actions should be taken when both the air bag light and the MIL light are illuminated.

Transfer Case Repair

  • Certain procedures should be followed to guarantee a successful transfer case repair.

Cylinder Leakage

  • A potential cause of a cylinder leakage issue is a specific problem with the spark plug aperture.

Battery State of Charge

  • A fully charged battery that has been sitting for many hours will have a minimum open-circuit voltage of a certain value.

Emergency and Service Lines

  • The emergency and service lines have specific colours.

Universal Joint Bearing Cup

  • If a universal joint bearing cup fails to purge, a specific action should be taken.

Refrigerant Pressure

  • A certain refrigerant pressure in the storage container indicates a specific temperature.

Grease Gun Connection

  • A specific action should be taken when connecting the grease gun to the fitting.

Motor Thermal Protector

  • A specific indicator on the nameplate of a motor or motor-compressor shows that the motor is equipped with a thermal protector.

Emission Test

  • A specific test validates a catalytic converter's probable defect.

Bearing Maintenance

  • The maintenance interval for bearings with conventional fittings or prepackaged bearings is a certain period.

Alternator Output

  • A primary cause of an alternator output current of 0 amps is a specific issue.

Transmission Repair

  • A specific procedure fixes an electronically controlled automatic transmission that refuses to move into second gear.

Circuit Breaker

  • A specific condition results in a type one circuit breaker cycling on and off repeatedly.

Antilock Brake System

  • A specific issue can cause the antilock brake system amber light to not go off after the engine is started.

Air Brake Systems

  • The three distinct air brake systems are service, parking, and emergency.

Electro-Hydraulic Control System

  • A specific step is the first in diagnosing a problem with an electro-hydraulic control system that employs an ECU to regulate hydraulic circuit operation.

Tractor-Trailer Safety

  • A specific test should be performed to test the safety of the tractor-trailer link.

AC Cooling System

  • A specific issue is the most likely cause of intermittently high and low side pressure gauge readings in an AC cooling system.

Flash Burn

  • Flash burn refers to a specific type of injury.

Excessive Amperage

  • Excessive amperage draw and sluggish cranking speed suggest a specific issue.

Engine Oil Leaks

  • Leaks in engine oil are often detected using a specific method.

Automatic Gearbox

  • Specific testing techniques must be conducted prior to concluding that an automatic gearbox requires a comprehensive overhaul.

Diagnostic Sequence

  • After a vehicle's issue codes have been obtained, the diagnostic is performed in a specific sequence.

Starter Armature

  • When the armature of a starter makes contact with the field winding, it is due to a specific cause.

Accessory Belt

  • Following the installation of a new accessory belt, a specific action must be taken.

Ignition Coil

  • The ignition coil's main winding is electrically coupled to the battery through a specific component.

Vehicle Computer

  • The name for the memory in a vehicle's computer that stores information that tailors the computer to the vehicle is a specific type of memory.

Transmission/Transaxle

  • A specific component cannot be removed from a transmission/transaxle prior to removing it from a vehicle.

Vapour Return Line

  • The vapour return line returns vapour from the fuel tank.

Pollutant

  • A specific pollutant is produced by high temperatures during combustion.

PCV Valve

  • The PCV valve's function in a running engine is to prevent engine oil contamination.

Vehicle Repair

  • The last stage before a vehicle is returned to service is a specific process.

Coolant Loss

  • If coolant is being lost without an exterior breach, a specific issue should be addressed.

Shifting Issues

  • A specific issue causes shifting problems, especially in first gear.

Intake Manifold

  • During engine idle, a specific component stops excessive air flow via the intake manifold.

Power Steering Hose

  • A specific action should be taken once a power steering hose has been replaced.

Rear Axle

  • A specific issue results in a high temperature measurement on a rear axle's input pinion after overhaul.

Thrust Angle

  • A specific issue causes a non-centered steering wheel and outside tire wear on the right rear tire.

Gearbox

  • A specific issue causes a gearbox to shift simultaneously into two gears.

Automatic Transmission

  • A specific issue causes a hydraulically operated automatic transmission to shift too quickly from first to second gear.

Exhaust Gas

  • Exhaust gas contains a specific substance.

Disc Brake

  • A specific issue causes a disc brake pad to wear severely.

Gasoline Gauges

  • There are two types of gasoline gauges: mechanical and electrical.

Transmission Shifting

  • A specific issue causes the transmission to shift harshly and the input bearing to be loud.

Automatic Leveling

  • A specific method determines whether the automatic leveling function of a vehicle's suspension has failed.

Engine Stalling

  • A specific issue causes the engine to stop when the ignition switch is returned to the run position after starting.

Oxygen Sensors

  • If the values from the upstream and downstream oxygen sensors are identical, it indicates a specific issue.

Torque Converter

  • A specific step is the concluding step when installing a torque converter on a transmission.

Snap Rings

  • Snap rings used in manual transaxles have a specific function.

Engine Knock

  • Engine knock occurs when the air-fuel combination ignites before the spark plugs.

Steering Issue

  • A specific issue causes a loud and stiff steering problem after replacing a deployed air bag.

Seatbelt Webbing

  • A specific method is used to clean seatbelt webbing.

Heater Core

  • A specific test is performed prior to removing a clogged heater core.

Torque Converter Repair

  • A specific inspection is the last inspection after repairing a torque converter for an automatic transmission.

Diesel Fuel Engine

  • A specific method is used to inspect a diesel fuel engine system that has a leak on the main side.

Axle Drive Shaft

  • A specific method is used to remove an axle drive shaft from a vehicle with a transaxle.

Knots

  • A specific knot is used to tie two lines of the same diameter together.

Ammeter Connection

  • An ammeter is connected to an electrical circuit in a specific way.

Vehicle Movement

  • A specific issue causes a delay in the vehicle's movement after shifting into drive.

Turbocharger Installation

  • A specific technique is used to install a new or remanufactured turbocharger.

Diesel Particulate Filter

  • A clogged diesel particulate filter causes a specific issue.

Power Brake Booster

  • A specific issue causes the brake pedal to glide down when the engine is started with the brakes engaged.

U-Joint Failure

  • A specific issue causes constant U-joint failure at low mileage.

Hypoid Gear

  • A specific issue causes a heavy heel pattern on a hypoid gear set.

Air Conditioning

  • A specific method is used to diagnose a shortage of airflow in the air conditioning system.

EGR System

  • A specific issue causes choppy engine idle and stalling in the EGR system.

U-Joint Deterioration

  • A specific issue causes a U-joint to continually deteriorate and exhibit brinelling.

Radiator Cap

  • A radiator cap on a car at a high altitude can only hold a certain amount of pressure.

Vacuum Booster

  • A specific step is the first step in doing a vacuum booster function test.

Capacitor-Start Motor

  • To reverse spinning of a capacitor-start motor, a specific action must be taken.

Battery Discharge

  • A specific issue causes a battery to discharge.

Fuel Tank

  • An uncontrolled fuel tank exhales a specific substance.

Ammeter

  • A specific method is used to connect an ammeter to a circuit.

Clutch Replacement

  • A specific action should be taken while changing a clutch.

Parking on Incline

  • A specific change is most likely to repair a car that rolls continuously while parked on an incline.

Engine Compression

  • Reducing an engine's compression ratio decreases combustion temperature and a specific other factor.

PCV Valve

  • A clogged

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