A.swell
B.shrinkage
C.flash off
D.lack of water
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A.Water Head Register
B.Water Heater Re-circulating
C.Waste Heat Recovery
D.Waste Handle Reference
A.yellowish flame
B.golden yellow flame
C.milky flame
D.brilliant white flame
As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: ()
(1) secure oil to fires
(2) increase feed pump pressure
A.(1)
B.(1)and(2)
C.(2)
D.neither(1)nor(2)
A.latent heat of condensation
B.latent heat of vaporization
C.latent heat of saturation
D.sensible heat of condensation
A.physical state
B.temperature
C.atmospheric pressure
D.sensible pressure
最新試題
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
When the steering gear is in operation, you should ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
If the suction pressure at the refrigeration compressor is below normal, the cause can be().
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
The general purpose of a heat exchanger is to ().
The output volume of a positive fixed displacement pump can be changed only by ().