QUESTION: 17

In the figure above, assume the valves are all closed.
To fill the tank, but to prevent it from filling entirely, which valves should be open?

1 and 2 only
1, 2, and 3 only
1, 2, and 4 only
1, 2, 3, and 5 only

Answer(s): D

Explanation:

Opening Valves 1 and 2 allows water to enter the tank.
Opening Valves 3 and 5 prevents water from filling the tank entirely. Opening Valve 4 allows water to leave the tank.

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QUESTION: 18

If Gear A is turned to the left _____________.

Gear B turns to the right and Gear C turns to the left.
Gear B turns to the left and Gear C turns to the left.
Gear B turns to the right and Gear C turns to the right.
Gear B turns to the left and Gear C turns to the right.

Answer(s): A

Explanation:

Gears with their teeth together in mesh turn in opposite directions.
Gear A turns Gear B in the opposite direction (right), and Gear B turns Gear C in the opposite direction (left).

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QUESTION: 19

If Gear 1 moves in a clockwise direction, which other gears also turn clockwise?

3 and 5
3, 4, and 5
2 and 5
3 and 4

Answer(s): A

Explanation:

Gears with their teeth together in mesh turn in opposite directions.
Gear 1 turns clockwise. Gear 2, in mesh with Gear 1, turns counterclockwise. Gear 3, in mesh with Gear 2, turns clockwise.
Gear 4, in mesh with Gear 3, turns counterclockwise. Gear 5, in mesh with Gear 2, turns clockwise.

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