A.yellowish flame
B.golden yellow flame
C.milky flame
D.brilliant white flame
您可能感興趣的試卷
你可能感興趣的試題
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
A.The blow down valve
B.The scum valve
C.The air release cock
D.The soot-blower
A.an diesel oil heater
B.a waste heat boiler
C.a fresh water generator
D.all the above
最新試題
A salinity indicator is used to determine the （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
A grease gun is generally used to lubricate a （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.