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17 Cards in this Set

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A typical car engine has how many strokes per cycle?

4 (intake, compression, power, exhaust)

1,8,6,4

What does “EFI” stand for in EFI computer?

Electronic Fuel Injection

The EFI computer controls the amount of fuel being injected into the engine electronically

When a driver presses the accelerator, what happens to the throttle?

It opens, which allows more fuel into the carburetor (or fuel injector).

The throttle is mechanically or electronically connected to the accelerator, and the more the driver pushes the pedal, the greater the throttle opens, and more fuel is transferred into the engine.

What is the function of the tachometer?

measures revolutions per minute

The tachometer measures RPM on the dashboard.

Which one of the following is not a stroke?

combustion

The four strokes in a cycle are intake, compression, power and exhaust

Ron decided one afternoon to take his dad’s car for a spin despite just learning how to drive one and despite the snow that was building up. As was taught to him, before he drove off, he checked the engine oil and refilled the the cooling system with water. But after an hour or so of driving the car, he noticed the engine was having a problem. He popped the hood to see that the water he had refilled had started to freeze. What went wrong?

He did not include a coolant in the water used to refill the cooling system.

A coolant is an antifreeze, which it lowers the freezing point of water to prevent it from freezing during cold weather.

What is the purpose of the oil pump?

provide lubrication and prevent friction between metal parts of the engine

Lubrication is important to extend the life of the engine parts and to lower the engine temperature by preventing friction.

If a driver inserts the key to start his car and finds that it does not work, then there is a problem with the ignition system. Seeing that the car has a full tank of gas, what is logically the next thing to check?

check the batteries by turning on the lights or radio

The ignition system needs current from the car battery to crank the engine

Whether it is electronic or an older version, what part of the ignition system is in charge of absorbing excess current?

voltage regulator

The voltage regulator protects the passageways of the high voltage current from breaking down by absorbing the excess current.

With an automatic transmission, which one is the best explanation as to why is there no need for a clutch?

There is a torque converter that automatically changes the torque needed.

The purpose of the clutch is to disconnect the engine from the drive shaft so that the driver can manually change gears or change the torque. A clutch would be useless in an automatic car.

Joe loves to go on wild nature adventures. He always brings his four-wheel drive truck. In difficult terrain such as deep snow or loose sand, why would Joe’s truck do better than a 2-wheel drive SUV?

It generates more torque and therefore more traction on difficult terrains.

4-wheel drive vehicles have 4 wheels moving at the same speed.

What are the two types of brakes?

drum and disc

Drums brakes usually are for the rear wheels and disc brakes for the front.

Which emission control system forces unburned or partially-burned fuel back into the cylinder in order to be burned?

positive-crankcase ventilation

Unburned or partially unburned fuel can result from the combustion process and can be harmful to the atmosphere.

What is the primary purpose of emission-control systems?

to filter exhaust

It filters out pollutants produced during combustion.

The air-injection system delivers air to which part of the engine?

exhaust

Air is forced into the exhaust system to burn any unburned fuel before it comes out of the exhaust pipe.

What makes a hammer different from a mallet and a sledge?

It has a claw to pull out nails.

Mallets and sledges do not have claws but are also striking tools.

This fastening tool is used to turn nuts and bolts.

wrench

Wrenches have a jaw where nuts and bolts can fit to be turned or held in place.