Shop Safety and Tools
Why should you never use compressed air to blow dust off your clothes or skin?
A) It makes too much noise in the shop.
B) It wastes the shop's electricity.
C) It makes your clothes too cold.
D) It can force air bubbles into your bloodstream or damage your eyes.
D) It can force air bubbles into your bloodstream or damage your eyes.
What happens during the "Compression" stroke of an engine?
A) The piston moves down and lets air in.
B) The spark plug fires and pushes the piston down.
C) The piston moves up and squeezes the air and fuel mixture.
D) The engine turns off.
B) The spark plug fires and pushes the piston down.
In electricity, what is "Voltage"?
A) The speed of the engine.
B) The electrical "pressure" that pushes current through a wire.
C) The weight of the car's battery.
D) The thickness of a wire.
B) The electrical "pressure" that pushes current through a wire.
What does a fuel filter do for an engine?
A) It removes dirt and debris from the fuel before it reaches the engine.
B) It turns regular gas into high-octane gas.
C) It measures how much gas is left in the tank.
D) It helps the car go faster by adding air to the gas.
A) It removes dirt and debris from the fuel before it reaches the engine.
In a disc brake system, what part does the caliper squeeze to stop the car?
A) The Brake drum
B) The Brake rotor
C) The Tire sidewall
D) The Axle
B) The Brake rotor
When using an air-powered impact wrench, what kind of sockets MUST you use?
A) Standard chrome hand-tool sockets.
B) Heavy-duty "impact" sockets (usually black).
C) Any socket that fits the bolt.
D) Plastic sockets to avoid scratches.
B) Heavy-duty "impact" sockets (usually black).
What are the four "strokes" of a typical car engine cycle, in order?
A) Start, Go, Fast, Stop.
B) Intake, Compression, Power, Exhaust.
C) Push, Pull, Spin, Turn.
D) Exhaust, Power, Intake, Compression.
B) Intake, Compression, Power, Exhaust.
What is "Resistance" in an electrical circuit?
A) Anything that slows down or fights the flow of electricity.
B) A type of battery used in trucks.
C) The power that makes a lightbulb bright.
D) When the car's brakes are applied.
A) Anything that slows down or fights the flow of electricity.
Which component is responsible for cooling the engine by releasing heat into the air?
A) The Fuel Tank.
B) The Radiator.
C) The Muffler.
D) The Air Filter.
B) The Radiator.
What part displays speed and temperature to the driver?
A) The Exhaust Pipe
B) The Instrument Panel
C) The Fuel Filter
D) The Radiator
B) The Instrument Panel
Which tool is best for removing a bolt that is very tight or stuck?
A) A pair of slip-joint pliers.
B) A flat-head screwdriver.
C) A 12-point socket and a short ratchet.
D) A 6-point socket and a long breaker bar.
D) A 6-point socket and a long breaker bar.
Which engine part moves up and down inside the cylinder to turn the crankshaft?
A) The Piston.
B) The Radiator.
C) The Camshaft.
D) The Alternator.
A) The Piston.
What is the purpose of a fuse in a car?
A) To make the headlights shine brighter.
B) To break the circuit if too much electricity flows through, preventing a fire.
C) To store extra electricity for later.
D) To help the engine start faster on cold days.
B) To break the circuit if too much electricity flows through, preventing a fire.
How does engine oil reduce friction between moving parts?
A) By turning into a solid when it gets hot.
B) By magnetic force.
C) By creating a thin pressurized film that keeps metal parts from touching.
D) By drying out the metal surfaces.
C) By creating a thin pressurized film that keeps metal parts from touching.
What is the basic function of the brake master cylinder?
A) To turn the steering wheel.
B) To cool down the brake pads.
C) To convert the pressure from your foot into hydraulic pressure.
D) To store the car's spare tire.
C) To convert the pressure from your foot into hydraulic pressure.
What should you do if an engine crane or transmission jack starts to fail while you are using it?
A) Try to catch the engine with your hands.
B) Get out of the way and let the part fall.
C) Put your foot under it to soften the landing.
D) Run toward it to tighten the bolts.
B) Get out of the way and let the part fall.
What is the job of the engine's crankshaft?
A) To spray fuel into the engine.
B) To change the up-and-down motion of pistons into spinning motion.
C) To keep the tires inflated.
D) To light the spark plugs.
B) To change the up-and-down motion of pistons into spinning motion.
When jump-starting a car, what is the last connection you should make for safety?
A) The positive cable to the good battery.
B) The negative cable to a solid metal part of the engine.
C) The negative cable to the positive terminal.
D) Your hands to the metal battery posts.
B) The negative cable to a solid metal part of the engine.
What system draws fumes out of the engine crankcase to be burned inside the engine?
A) The ABS system
B) The Cooling system
C) The Exhaust system
D) The PCV (Positive Crankcase Ventilation) system
D) The PCV (Positive Crankcase Ventilation) system
Which system is responsible for providing high voltage to the spark plugs?
A) The Braking system
B) The Steering system
C) The Ignition system
D) The Cooling system
C) The Ignition system
When working on a vehicle's fuel system, which safety item must always be nearby?
A) A fire extinguisher.
B) A shop vacuum.
C) A bucket of water.
D) An air compressor.
A) A fire extinguisher.
What engine part connects the piston to the crankshaft?
A) The Drive Shaft.
B) The Timing Belt.
C) The Valve Spring.
D) The Connecting Rod.
D) The Connecting Rod.
What is the name of the law that explains the relationship between Voltage, Current, and Resistance?
A) Newton's Law.
B) Ohm's Law.
C) The Law of Gravity.
D) The Speed Limit.
B) Ohm's Law.
What is the main job of the catalytic converter in the exhaust system?
A) To make the car sound louder.
B) To change harmful gases into less harmful ones like water vapor.
C) To cool down the engine's oil.
D) To increase the car's top speed.
B) To change harmful gases into less harmful ones like water vapor.
What does "On-Board Diagnostics" (OBD) monitor in a modern car?
A) Engine performance and emission levels.
B) The driver's heart rate.
C) How much air is in the spare tire.
D) The cleanliness of the car's paint.
A) Engine performance and emission levels.