Automotive Service

1. Automotive Service Test Review Questions

2. Automotive Service Test Review 1. What type of socket is used to turn nuts when a long portion of the bolt or stud protrudes through the nut? 2. What type of wrench handle is required to measure the amount of twisting force that is being applied in tightening a bolt? 3. What type of screwdriver is designed to be used as a chisel? 4. What type of pliers are used for cutting wire and tape? 5. What type of hammer is best when a great deal of driving power is required? 6. What type of punch is used for marking drill holes prior to drilling? 7. Technician A says the size of USCS wrenches is given in fractions of an inch. Technician B says it is okay to use a USCS wrench on a metric fastener if it is close in size. Who is correct? 8. Technician A says universal sockets are used when straight-on access to bolts is not possible. Technician B says impact sockets are not as strong as standard sockets. Who is correct? 9. Technician A says a ratchet handle can turn both counterclockwise and clockwise by flipping a small switch on the tool. Technician B says the sockets used on socket wrenches are adjustable. Who is correct? 10. Technician A says a T-handle is used when extra leverage is required. Technician B says a torque wrench measures the twisting force that is being applied in tightening a bolt. Who is correct?

3. 11. Technician A says nut drivers are useful for quickly removing small nuts and bolts on vehicles. Technician B says the socket at the tip of nut drivers is not removable. Who is correct? 12. Technician A says brass hammers can be used on iron and steel components because they do minimal damage. Technician B says a plastic-tip hammer is the most common hammer used to drive punches and chisels. Who is correct? 13. Technician A says punches are used to cut or chip metal. Technician B says a taper punch is designed to drive out rivets after the rivet head has been removed. Who is correct? 14. Technician A says, if a punch or chisel has a mushroomed head, the mushroomed metal may fly off the tool. Technician B says, if a punch or chisel has a mushroomed head, the hammer slips off the head more easily. Who is correct?. 15. Technician A says files are designed to pry components apart. Technician B says files are designed to cut the heads off fasteners. Who is correct? 16. Technician A says an oscilloscope connects via cable to the vehicle’s DLC. Technician B says an oscilloscope displays a line pattern that shows voltage in relation to time. Who is correct? 17. Technician A says American automobile manufacturers have largely switched to using the USCS system of sizing fasteners and threads. Technician B says the length of a bolt is measured from under the head to the end of the threads. Who is correct? 18. Technician A says a tap is used to cut threads onto a rod. Technician B says a die is used to cut threads into a hole. Who is correct? 19. Technician A says chasing threads involves installing a helicoil to restore the threads back to their original size. Technician B says a thread insert is similar to a helicoil but is somewhat larger. Who is correct? 20. Technician A says the thimble and anvil are the parts of an outside micrometer that contact the item being measured. Technician B says, when using a micrometer, readings from several scales must be added to get the correct measurement. Who is correct?

4. 21.Technician A says a dial caliper has jaws for making inside measurements and jaws for making outside measurements. Technician B says a dial caliper is used rather than a micrometer when an extremely precise measurement is required. Who is correct? 22.What are some safety hazards associated with operating pneumatic tools? 23.Cordless tools are powered by ____________________________. 24.What size is a power drill that holds a drill bit with a shaft diameter no larger than 3/8 in? 25.An impact wrench uses _________________________ air. 26.How often should water be drained from the storage tank on an air compressor? 27.Technician A says blowing compressed air on skin can cause infection. Technician B says flushing oil should be applied to a new pneumatic tool before operating the tool. Who is correct? 28.Technician A says a quick coupler connects a battery to a cordless tool. Technician B says the batteries in cordless tools rarely need recharging. Who is correct? 29.Technician A says hydraulic fluid is a cleaning agent used for hydraulic equipment. Technician B says hydraulic pressure is created by the manual pumping of a handle or air pressure. Who is correct? 30.Technician A says, in pneumatic power drills, a rotor drives the chuck. Technician B says the chuck key for power drills is used to turn the drill on and off. Who is correct?

5. 31.Technician A says a standard socket should not be used with an impact wrench. Technician B says the regulator on an impact wrench should be used to make final torque adjustments. Who is correct? 32.Technician A says a wheel balancer roughs up the rubber on the inside of tires. Technician B says a tire machine equally distributes the weight around a wheel. Who is correct? 33.Technician A says pneumatic tools can be permanently or temporarily attached to the air compressor. Technician B says the three main parts of an air compressor are the motor, drain valve, and drain tube. Who is correct? 34.Technician A says an engine hoist is also referred to as a portable engine crane. Technician B says an object being moved by a hoist should be moved very slowly. Who is correct? 35.Technician A says to refer to the general service information section of service information for help in reading the vehicle’s VIN. Technician B says the repair sections of service information include detailed repair procedures for each system of the vehicle. Who is correct? 36.Technician A says the engine code is generally stamped on the hood of the vehicle. Technician B says the engine code provides information about whether the engine was designed for a manual or automatic transmission. Who is correct? 37.Technician A says when ordering a repair part, the part vendor may need to know the vehicle’s engine size. Technician B says when ordering a repair part, the part vendor may need to know the number of doors on the vehicle. Who is correct? 38.What type solvent is formulated to loosen material that is sealed or glued? 39.Paper towels are best to use with glass cleaner because shop towels may 40.What types of long-term hazards can be caused by prolonged contact of the skin with grease or oil?

6. 41.Hydraulic jack oil is used on what type of equipment _______________________? 42.Which specialty chemical acts as a lock washer? 43.Technician A says petroleum-based parts-washing solvent is best for cleaning electric motors. Technician B says when petroleum-based parts-washing solvent gets low, pour a little water in the solution. Who is correct? 44.Technician A says digestive-type carburetor cleaner should be used to clean small, precision components. Technician B says digestive-type carburetor cleaner can burn skin quickly. Who is correct? 45.Technician A says liquid detergent is suitable for washing engine blocks after honing. Technician B says hand-protecting creams cannot be removed by ordinary hand soap. Who is correct? 46.Technician A says most hydraulic fluids are safe on paint. Technician B says using the incorrect brake fluid can cause brakes to malfunction or fail. Who is correct? 47.Technician A says an aerobic sealer cures only in the absence of air. Technician B says an anaerobic sealer cures only when exposed to air. Who is correct? 48.Technician A says thread sealant is used to protect bolts and threads that are exposed to liquids. Technician B says anti-seize compounds are used to prevent a fastener from loosening. Who is correct? 49.A type of wrench commonly used to turn nuts and bolts that have already been loosened is the ____________ 50.A type of wrench that is used to loosen steel line fittings is the ____________________.

7. 51.The property of electricity that can be described as “electrical pressure” is called _______________. 52.Movement of electrons through a conductor is called _____________. 53.The difference between the voltage on the input side of a device compared to the voltage on the output side is called ________________. 54.A 12-volt automotive battery releases _____________________ during charging. 55.What is the averaged specific gravity readings indicates a discharged battery? 56.As temperature decreases, a battery’s available power _______________. 57.The built-in hydrometer eye is green. You find that the hold-down was loose, causing a small hole to be rubbed through the case. _____ 58.A conventional battery is failing to start a vehicle. The generator lost its drive belt and was not charging the battery. Open circuit voltage is 12.06 and six cells showed 1.155 when checked with a hydrometer. _____ 59.The battery shows 1.270 in six cells when checked with the hydrometer. During a load test, the voltage dropped to 10.5 volts. _____ 60.A hydrometer test showed 1.250 in five cells. One cell showed 1.200. _____

8. 61.Safety glasses should be worn when ____________________. 62.To remove a stubborn terminal end, you should _______________________. 63.A battery will self-discharge slower at a lower ____________________________. 64.A dark built-in hydrometer eye indicates __________________________. 65.Front wheel drive vehicles typically use what type of brake system ____________? 66.Technician A says that brake fade occurs if the brakes create more heat than they can dissipate and the friction coefficient reduces. Technician B says that brake fade occurs by a fast dissipation of heat in the brake system that causes a glazing on the brake lining. Who is correct? 67.What percentage of the braking force comes from the rear brakes in a typical front wheel drive vehicle? 68.Technician A says that if the friction coefficient is too low, the brakes may require excessive pressure. Technician B says that if the friction coefficient is too low, the brakes may be overly sensitive. Who is correct? 69.The more weight a moving vehicle has, the more _________________________________. 70.The _______ the tire’s footprint is, the ______ stopping power can be applied at the tire’s contact point with the road.

9. 71.Front/rear split brake systems are most commonly used on _______. 72.Technician A says that piston rings seal combustion pressure in the cylinder. Technician B says that piston rings prevent engine oil from entering the combustion chamber. Who is correct? 73.Intake valves are __________ than exhaust valves. 74.In a pushrod engine, the camshaft is located in the ___________. 75.The vast majority of automobile engines operate on the _____________cycle. 76.This type of engine relies on the heat of compression to ignite the fuel. 77.Engines with the camshaft located in the cylinder head are known as ______________ engines. 78.An inline DOHC engine has ________ camshafts. 79.This part has carefully machined high spots called lobes. 80.V-type engines have _______ cylinder banks.