Disk Brakes - Marvel EDU

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Practice Listening: Multiple Choice, Single Answer ID: #41040 Short Disk Brakes

Instructions ›

You will see a video explaining how disc brakes in automobiles work. Listen to the recording and answer the multiple-choice question by selecting the correct response. Only one response is correct.

Transcript:

Of the two common braking systems used in automobiles, disc brakes and drum brakes, the disc system is the more reliable. Disc brakes work on the principle of applying friction to a rotating disc. The brake has three major elements, a cast iron disc that is attached to the wheel, brake pads on either side, which apply friction and a hydraulic piston. Pushes each pad against the disk. When the brake pedal is stepped on, hydraulic fluid is forced from the master cylinder to the slave cylinders at each wheel. Hydraulic system is used because it delivers pressure equally to all. The pressurised fluid pushes the slave Pistons, which in turn push the brake pads against the rotating disk. The greater the pressure, the harder the pads rub, the faster the braking.

Why are disc brakes considered more reliable than drum brakes in automobiles?

* Listen to the recording and select the correct answer

They use a hydraulic system that applies pressure equally to all wheels. They require less maintenance over time compared to drum brakes. They apply friction to a rotating disc, providing faster braking. They consist of fewer parts that are less likely to fail.

Result:

AI explanationShows the answer. Tap to open.

Option 1: "They use a hydraulic system that applies pressure equally to all wheels."

Explanation: The text states that the hydraulic system delivers pressure equally to all wheels, which is a key reason why disc brakes are considered more reliable. This system ensures consistent braking performance across all wheels, enhancing safety and reliability. The mention of hydraulic fluid being forced from the master cylinder to the slave cylinders supports this point, indicating a well-designed mechanism that minimizes the risk of failure.

Option 2: "They require less maintenance over time compared to drum brakes."

Explanation: While maintenance is an important aspect of braking systems, the text does not provide any information regarding the maintenance requirements of disc brakes compared to drum brakes. Therefore, this option is not supported by the text and is considered incorrect.

Option 3: "They apply friction to a rotating disc, providing faster braking."

Explanation: Although the text mentions that disc brakes apply friction to a rotating disc, it does not specifically state that this results in faster braking compared to drum brakes. The focus of the text is on the reliability of the braking system rather than the speed of braking, making this option misleading and incorrect.

Option 4: "They consist of fewer parts that are less likely to fail."

Explanation: The text does not discuss the number of parts in disc brakes compared to drum brakes or their likelihood of failure. This option introduces an assumption that is not supported by the information provided in the text, leading to its classification as incorrect.

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