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Match the description in COLUMN A to the terms in COLUMN B. Write only the letter of the alphabet in COLUMN B next to its matching description in the ANSWER column.

Physics

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Answer

B

Step-by-step solution

2 steps

  1. Match the descriptions in COLUMN A with the correct terms in COLUMN B.

    • 1.1.1: "Wheels with teeth that mesh with each other. They change the speed and direction of a rotating shaft." This describes the general function of gears, and specifically, Spur gears are the most common type for transmitting motion between parallel shafts.
      • Answer: B
    • 1.1.2: "These gears work on the screw principle. A rotation on the screw wheel causes a much slower rotation on the teethed wheel. The input and output shafts are also at 90° to each other." This description perfectly matches Worm gears, which are known for high reduction ratios and perpendicular shafts.
      • Answer: D
    • 1.1.3: "A gear wheel and a toothed bar to change a rotary movement into a linear movement." This system, consisting of a circular gear (pinion) and a straight toothed bar (rack), is called a Rack and pinion.
      • Answer: C
    • 1.1.4: "These gears change the direction of rotation through 90°. The teeth are angled at 40° so the gears fit together at right angles." Gears designed to transmit power between intersecting shafts, typically at 90 degrees, are Bevel gears.
      • Answer: A

  2. Underline the correct answer for question 1.2.1.

    • 1.2.1: "Two or more spur gears meshed together are called a ..."
      • When multiple gears are meshed together to transmit motion, they form a Gear train.
      • The correct option is B.
    COLUMN AANSWERCOLUMN B1.1.1 Wheels with teeth that mesh with each other. TheyBA. Bevel gearschange the speed and direction of a rotating shaft.1.1.2 These gears work on the screw principle. A rotationDB. Spur gearson the screw wheel causes a much slower rotationon the teethed wheel. The input and output shaftsare also at 90° to each other.1.1.3 A gear wheel and a toothed bar to change a rotaryCC. Rack andmovement into a linear movement.pinion1.1.4 These gears change the direction of rotationAD. Worm gearsthrough 90°. The teeth are angled at 40° so thegears fit together at right angles.\begin{array}{|l|l|l|} \hline \textbf{COLUMN A} & \textbf{ANSWER} & \textbf{COLUMN B} \\ \hline \text{1.1.1 Wheels with teeth that mesh with each other. They} & \text{B} & \text{A. Bevel gears} \\ \text{change the speed and direction of a rotating shaft.} & & \\ \hline \text{1.1.2 These gears work on the screw principle. A rotation} & \text{D} & \text{B. Spur gears} \\ \text{on the screw wheel causes a much slower rotation} & & \\ \text{on the teethed wheel. The input and output shafts} & & \\ \text{are also at 90° to each other.} & & \\ \hline \text{1.1.3 A gear wheel and a toothed bar to change a rotary} & \text{C} & \text{C. Rack and} \\ \text{movement into a linear movement.} & & \text{pinion} \\ \hline \text{1.1.4 These gears change the direction of rotation} & \text{A} & \text{D. Worm gears} \\ \text{through 90°. The teeth are angled at 40° so the} & & \\ \text{gears fit together at right angles.} & & \\ \hline \end{array}

    1.2 Underline the correct answer.
    1.2.1 Two or more spur gears meshed together are called a ...
    A. Pinion
    B. Gear train
    C. Gear ratio
    D. Idler gears

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