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【单选题】
When an auxiliary boiler is panting and emitting black smoke, you should _____.A.
increase the fuel oil temperature
B.
decrease the fuel oil temperature
C.
decrease the fuel oil supply pressure
D.
increase the air supply
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反馈参考答案：
举一反三
【单选题】Pressure switch controls ( )
A.
electrical circuit
B.
flow direction
C.
fluid pressure
D.
oil flowrate
【单选题】If a refrigeration compressor were short cycling on the low pressure cutout switch, the probable cause for this might be the ______.
A.
system was overcharged with refrigerant
B.
high pressure switch was improperly adjusted
C.
expansion valve strainers were fouled
D.
suction valves were leaking slightly
【简答题】语篇填空：根据篇章语境填出适当的单词，最多不超过3个单词 Lily: Boys and girls, May I have your attention Please! Today we have an honorable guest here, Professor Smith, ___小题1:____ come from the USA. Professor Smith , could y...
【单选题】If the compressor runs continually, the cause might be the .
A.
high-pressure cutout switch is jammed open
B.
low-pressure switch is jammed shut
C.
thermal bulb is not operating properly
D.
scale trap is clogged
【单选题】Pressure switch controls ( )
A.
fluid pressure
B.
flow direction
C.
oil flowrate
D.
electrical circuit
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