题目内容
(请给出正确答案)
[主观题]
Electric circuits are protected against overloads and short circuits by means of a/an ____
_.
A.circuit breaker
B.amplifier
C.diode
D.capacitor
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A.circuit breaker
B.amplifier
C.diode
D.capacitor
第1题
A.oil foaming in the compressor
B.higher than normal suction and discharge pressures with a higher box temperature
C.higher than normal discharge pressure with a normal box temperature
D.the compressor to run continuously
第2题
A.Loss of compression for that cylinder
B.Misfiring or rough running
C.Damage to the valve
D.All of the above
第3题
A.2
B.4
C.6
D.8
第4题
A.Too much sludge accumulated in separator bowl
B.Diameter of gravity disc too large
C.High level tank lack of water
D.Oil input too rapidly
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