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21 Cards in this Set
- Front
- Back
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If you hear a loud clanking noise from the rear of a rear-wheeled drive, front engine car, you should look for trouble at:
A. the differential or driveshaft B. The transmission C. The engine D. The clutch |
A. The differential and the driveshaft are the big moving parts at the rear of a rear-wheeled-drive car that has the engine in the front.
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If one engine cylinder does not work right, you should check for problems in the:
A. Drive Train B. Pollution controls C. Ignition or fuel system D. Clutch |
C. Ignition or fuel system
Either the spark plug is not working right or there is a problem with the incoming fuel-air-mix |
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If the tire pressure gets low, what will happen?
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The tire will lose its shape and create extra friction, reducing gas mileage and possibly overheating the tire.
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If an engine with conventional ignition runs rough, what might you adjust One important difference between front-wheel drive and rear-wheel drive is that in front wheel drive,
A. The layshaft moves the driveshaft B. The engine must be rotated 180 degrees from normal position. C. The driving wheels also steer D. The rear wheels must also drive. |
C. Front wheel drive mechanisms are complicated because they both drive and steer.
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Which is the correct sequence in a four cycle internal combustion engine?
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Intake, compression, power, exhaust
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If you suspect that not enough gasoline is entering the engine, what might you check first?
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The fuel system
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What is an engine control module
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The ECM is basically an on-board computer in your car -- it's composed of hardware (a pretty standard circuit board) that's encoded with software (a program that tells the car how to run).
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When a manual transmission is in a "direct-drive-gear", one revolution of the engine produces,
A. Two revolutions of the driveshaft B. One revolution of the driveshaft C. One-half revolution of the driveshaft D. Two revolutions of the clutch |
Manual transmissions usually have one "direct-drive" gear, where the input speed is the same as the output speed. The drive shaft rotates along the transmissions output shaft.
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What must happen before the starter motor is engaged?
A. The brakes must be adjusted B. The starter relay must be closed C. The gas tank must be full D. The oil pump must be automatically primed. |
The starter relay is a big switch located between the battery and the starter motor. Starter motors demand a huge current, which would require an expensive and clumsy cable from the battery to the ignition switch and the starter motor. instead, the ignition switch activates the starter relay, which temporarily connects the battery to the starter motor.
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If the exhaust valve does not open,
A. the fuel air mix cannot enter the engine. B. The car will not pollute. C. The engine will run a bit rough. D. Burned gas cannot leave the cylinder, and the engine will not run. |
D.
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If the differential ration is 3 to 1
A. One turn of the driveshaft produces three turns of the wheels B. Three turns of the jack shaft produces one turn of the wheels. C. The ring gear is probably disengaged. D. Three turns of the driveshaft produce one turn of the wheels |
D. The differential has reduction gears so that the engine can turn fast enough to make power. A 3-1 ratio means that 3 turns of the driveshaft produce 1 turn of the wheels.
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What is a jack shaft
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also called a countershaft, is a common mechanical design component used to transfer or synchronize rotational force in a machine. A jackshaft is often just a short stub with supporting bearings on the ends and two pulleys, gears, or cranks attached to it.
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A plywood-cutting blade for a circular saw:
A. has a few big teeth because plywood is so much harder than regular wood B. cannot be used with particle board C. must not be too sharp or else it will burn the wood D. has many small teeth to reduce splintering |
D. Plywood splinters easily, and each small tooth takes a smaller "bite," reducing splintering. Why are the other answers incorrect? Choice A. Big teeth cause more splintering. Choice B: A plywood blade is fine for particle board. Choice C. In saw blades, sharper is always better.
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Which of the following is a poor use of a claw hammer?
A. Pulling nails B. Hammering nails C. Driving screws D. Driving wood chisels |
C. Driving screws
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It helps to hit a larger chisel with a bigger hammer because the hammer is:
A. Heavier B. More Massive C. Bigger, and therefore less likely to miss the chisel D. Slower-moving |
B. Impact equals mass times velocity, so for any given hammer speed, a more massive hammer makes more impact. Why are the other answers incorrect? A. Mass, not weight, determines the intensity of impact. Choice C. Size alone does not make the hammer more effective
D. A slower moving hammer is less effective. |
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Plywood is better than regular wood for sub-floor main because
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D. Plywood is stronger than regular wood because the grain is crisscrossed, preventing splitting and reducing weakness at knots.
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Which tool might replace a hack saw for some jobs?
A. A circular saw with a carbide blade B. A keyhole saw C. A coping saw D. An oxyacetylene cutting torch |
D. An oxyacetylene cutting torch is made for cutting metal. Why are the other answers incorrect?
All the saw mentioned are designed to cut wood. |
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Which of these tools does not start to clamp until you turn it?
A. C-clamp B. Locking pliers C. Pipe wrench D. Vise |
C. A pipe wrench fits loosely on the pipe; turning activates the grabbing action. The other tools all must be tightened before use.
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What is not an advantage of a sharp drill bit?
A. It creates a smaller amount of chips B. It cuts with less pressure C. It cuts cooler D. It cuts faster |
A. a sharp drill bit cuts faster, cooler, and with less pressure on the drill, but it makes the same amount of chips.
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Which of the following would not loosen a frozen nut?
A. Heating it with a torch B. Pounding it with a hammer C. Soaking it in penetrating oil D. Dousing it in ice water. |
D. Dousing it in a ice water.
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A plumb line makes what kind of angle where it intersects a level line?
A. acute B. Obtuse C. Square D. Straight |
C. A plumb line is vertical and a level line is horizontal, so the angle between them is square, or 90 degrees.
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