The Clutch Quiz

Staff

4 Min Quiz

Image: refer to hsw

About This Quiz

Clutches are in many things that you see or use everyday. The car you drive is just one example. If you drive a manual transmission car, you may be surprised to find out that it has more than one clutch. If you drive an automatic transmission car, well, you have clutches, too. How much do you know about clutches?

In a car's clutch, a flywheel connects to the engine, and a clutch plate connects to the ______.

In a car's clutch, a flywheel connects to the engine, and a clutch plate connects to the transmission.

Advertisement

At what point is the clutch actually wearing?

The clutch only wears while the clutch disc and the flywheel are spinning at different speeds. When they are locked together, the friction material is held tightly against the flywheel, and they spin in sync. It's only when the clutch disc is slipping against the flywheel that wearing occurs. So, if you're the type of driver who slips the clutch a lot, you'll wear out your clutch a lot faster.

Advertisement

The amount of force the clutch can hold depends on the ______ between the clutch plate and the flywheel, and how much force the spring puts on the pressure plate.

The amount of force the clutch can hold depends on the friction between the clutch plate and the flywheel, and how much force the spring puts on the pressure plate. The friction force in the clutch works just like the blocks described in the friction section of How Brakes Work, except that the spring presses on the clutch plate instead of weight pressing the block into the ground.

Advertisement

Which one of the following unlikely items has a clutch?

There are clutches in many things you probably see or use every day: Many cordless drills have a clutch, chain saws have a centrifugal clutch and even some yo-yos have a clutch.

Advertisement

Which one of the following is not a common reason that a car's clutch may stick?

Some common reasons a clutch may stick are: a broken or stretched clutch cable, leaky or defective slave and/or master clutch cylinders, air in the hydraulic line, misadjusted linkage and mismatched clutch components.

Advertisement

What is another name for a throw-out bearing?

Another problem associated with clutches is a worn throw-out bearing, sometimes called a clutch release bearing. This bearing applies force to the fingers of the spinning pressure plate to release the clutch. If you hear a rumbling sound when the clutch engages, you might have a problem with the throw-out.

Advertisement

An automatic transmission has how many clutches?

An automatic transmission contains several clutches. These clutches engage and disengage various sets of planetary gears. Each clutch is put into motion using pressurized hydraulic fluid. When the pressure drops, springs cause the clutch to release. Evenly spaced ridges, called splines, line the inside and outside of the clutch to lock into the gears and the clutch housing.

Advertisement

On a vehicle that has an engine-driven cooling fan with a thermostatically-controlled viscous clutch -- what actually drives the clutch?

Most cars that have an engine-driven cooling fan have a thermostatically-controlled viscous clutch -- the temperature of the fluid actually drives the clutch. This clutch is positioned at the hub of the fan, in the airflow coming through the radiator. This type of clutch is a lot like the viscous coupling sometimes found in all-wheel drive cars. The fluid in the clutch gets thicker as it heats up, causing the fan to spin faster to catch up with the engine rotation. When the car is cold, the fluid in the clutch remains cold and the fan spins slowly, allowing the engine to quickly warm up to its proper operating temperature.

Advertisement

As the rotations per minute increase, weighted arms swing out and force the clutch to engage. This describes the operation of what type of clutch?

Gas-powered chain saws and weed eaters have centrifugal clutches, so that the chains or strings can stop spinning without you having to turn off the engine. These clutches work automatically through the use of centrifugal force. The input is connected to the engine crankshaft. The output can drive a chain, belt or shaft. As the rotations per minute increase, weighted arms swing out and force the clutch to engage. Centrifugal clutches are also often found in lawn mowers, go-karts, mopeds and mini-bikes. Even some yo-yos are manufactured with centrifugal clutches.

Advertisement

What is the most common problem associated with clutches?

The most common problem with clutches is that the friction material on the disc wears out. The friction material on a clutch disc is very similar to the friction material on the pads of a disc brake or the shoes of a drum brake -- after a while, it wears away. When most or all of the friction material is gone, the clutch will start to slip, and eventually it won't transmit any power from the engine to the wheels.

Advertisement

Explore More Quizzes

About HowStuffWorks Play

How much do you know about dinosaurs? What is an octane rating? And how do you use a proper noun? Lucky for you, HowStuffWorks Play is here to help. Our award-winning website offers reliable, easy-to-understand explanations about how the world works. From fun quizzes that bring joy to your day, to compelling photography and fascinating lists, HowStuffWorks Play offers something for everyone. Sometimes we explain how stuff works, other times, we ask you, but we’re always exploring in the name of fun! Because learning is fun, so stick with us!