Free AFCT Auto and Shop Information Questions and Answers 1 — Questions and Answers
Question 1: Which of the following tools is specifically designed to measure a very small gap or clearance between two parts, such as a spark plug gap?
- A caliper
- A micrometer
- A feeler gauge (Correct answer)
- A tape measure
Correct answer: A feeler gauge
A feeler gauge is a tool consisting of several small lengths of steel of different, calibrated thicknesses. It is used by inserting the blades into a gap until a slight drag is felt, allowing for a precise measurement of the clearance.
Question 2: In a standard four-stroke internal combustion engine, what is the correct sequence of strokes?
- Intake, Power, Compression, Exhaust
- Intake, Compression, Power, Exhaust (Correct answer)
- Compression, Intake, Power, Exhaust
- Power, Compression, Intake, Exhaust
Correct answer: Intake, Compression, Power, Exhaust
The cycle begins with the Intake stroke, drawing in the fuel-air mixture. This is followed by the Compression stroke, then the Power stroke where ignition occurs, and finally the Exhaust stroke to expel the burnt gases. A common mnemonic is 'Suck, Squeeze, Bang, Blow'.
Question 3: What is the primary purpose of a torque wrench?
- To loosen extremely tight or rusted bolts
- To apply a precise amount of rotational force (Correct answer)
- To quickly tighten or loosen fasteners
- To measure the angle of a fastener's rotation
Correct answer: To apply a precise amount of rotational force
A torque wrench is a precision tool that allows a user to apply a specific, measured amount of rotational force (torque) to a fastener. This is critical for safety and performance, as it prevents under-tightening or over-tightening bolts on components like wheels and engine parts.
Question 4: Before drilling a hole in a piece of metal, it is best practice to use a center punch to:
- Harden the metal surface
- Check for electrical conductivity
- Create a guide dimple for the drill bit (Correct answer)
- Remove any rust from the drilling area
Correct answer: Create a guide dimple for the drill bit
Using a center punch creates a small indentation in the metal surface. This dimple provides a starting point for the drill bit, preventing it from 'walking' or wandering across the surface and ensuring the hole is drilled in the precise location.
Question 5: What is the function of a car's radiator?
- To heat the cabin of the car
- To filter the engine oil
- To dissipate heat from the engine coolant (Correct answer)
- To charge the vehicle's battery
Correct answer: To dissipate heat from the engine coolant
The radiator is a key component of the engine's cooling system. Hot coolant from the engine flows through the radiator's thin tubes, where airflow (from driving or a fan) dissipates the heat before the cooled fluid is circulated back to the engine.
Question 6: Which tool would be most effective for gripping a round object, like a pipe?
- Adjustable wrench
- Pipe wrench (Correct answer)
- Open-end wrench
- Socket wrench
Correct answer: Pipe wrench
A pipe wrench is designed with serrated, angled jaws that tighten their grip as force is applied in the correct direction. This design makes it ideal for gripping and turning round objects like pipes without slipping, which is difficult for wrenches with flat jaws.
Free AFCT Auto and Shop Information Questions and Answers 1
Which of the following tools is specifically designed to measure a very small gap or clearance between two parts, such as a spark plug gap?