单项选择题
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 cond...
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）
The amount of heat released by steam when it changes to...
单项选择题The amount of heat released by steam when it changes to water at the same temperature is called（）.
A.latent heat of condensation B.latent heat of vaporization C.latent heat of saturation D.sensible heat of condensation
Latent heat changes the （） of water.A.physical stateB.t...
单项选择题Latent heat changes the （） of water.
A.physical state B.temperature C.atmospheric pressure D.sensible pressure
