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單項選擇題

The air reservoirs must have （） fitted to prevent rupture in the event of fire.

A.high pressure alarm
B.fire alarm
C.extinguishers
D.fusible plugs

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單項選擇題

Before liquid can flow into a pump, the air in the suction line must be （） sufficiently to cause the liquid to flow into the suction chamber.

A.filled
B.evacuated
C.compressed
D.charged

單項選擇題

Generally speaking, suction heads require to be （） for high speed or large capacities than for low speed or small capacities.

A.greater
B.smaller
C.better
D.worse

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