更多"Prior to lighting off a cold automa"的相关试题:
[单项选择]Prior to lighting off a cold automatically fired auxiliary boiler, yon should （）.
A. check and regulate the water level
B. close the air cock once fires are lit
C. blowdown the gage glass
D. crack the steam stop to assure protective steam flow
[单项选择]Excessive vibration of an automatically fired auxiliary boiler can be caused by （）
A. air or water in the furnace
B. combustion pulses
C. fuel oil pump failure
D. flame failure
[单项选择]Burner ignition failure in an automatically fired auxiliary boiler would be caused by（）
A. a burned out solenoid in the oil supply valve
B. high temperature excess air
C. incorrectly setting the hot-well dump valve
D. an incorrectly positioned burner snubber realy
[单项选择]Flame failure in an automatically fired auxiliary boiler can from a/an （）
A. incorrect electrode setting
B. incorrect nozzle position
C. clogged fuel nozzle
D. broken high tension lead
[单项选择]A firebox explosion in an automatically fired auxiliary boiler may be the result of （）
A. excessive purging before lighting off
B. insufficient trail for ignition period
C. a faulty transformer in the ignition circuit
D. insufficient purging before lighting off
[单项选择]The boiler is fired （） the demand for steam exceeds that available from exhaust gas heating.
A. whenever
B. however
C. wherever
D. whether
[单项选择]As for a oil-fired boiler too much air would indicated by （）.
A. yellowish flame
B. golden yellow flame
C. milky flame
D. brilliant white flame
[单项选择]
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）
[单项选择]The furnace of an oil fired boiler should be （） before the operating burner is lit.
A. filled with water
B. purged
C. cleared of air
D. None of the above is true
[单项选择]Too much air in the furnace of an oil-fired boiler would be indicated by （）.
A. yellowish flame
B. golden yellow flame
C. white flame
D. brilliant white flame
[单项选择]Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）
A. slightly less than the line frequency
B. the same as the line frequency
C. slightly greater than the line frequency
D. All of the above
[单项选择]Prior to backloading portable tanks or drums onto an offshore supply vessel，check that each tank is（）.
A. painted yellow with diagonal black striping
B. capped and checked for leaks
C. coated with non-corrosive protection
D. mounted on pallets
[单项选择]Prior to magnetic particle inspection of anchor chain，the chain should be（）.
A. degaussed
B. demagnetized
C. soaked
D. sandblasted
[单项选择]If reefer spaces are not properly cleaned prior to loading cargo, it will most likely cause（）.
A. mold to develop on commodities
B. malfunction of the refrigeration equipment
C. contamination of the insulation in the space
D. All of the above
[单项选择]Prior to lowering the lifeboat，the most important item to check is the（）.
A. oars
B. sail
C. boat plug
D. life preservers
[单项选择]Please get everything ready prior（）shifting.
A. on
B. to
C. at
D. for
[单项选择]Prior to getting underway in fresh or brackish water，the Master must（）.
A. log the density of the water
B. secure all overboard discharges
C. take on fresh water ballast
D. clean the sides with fresh water
[单项选择]Prior to any overhaul work on electric equipment, it is important to ensure the circuits are （）.
A. live
B. dead
C. excited
D. on line
