更多"A cabinet or space containing the c"的相关试题:
[单项选择]A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
A. posted with instructions on the operation of the system
B. ventilated and equipped with explosion-proof switches
C. painted with red and black diagonal stripes
D. equipped with a battery powered source of emergency lighting
[单项选择]On a ship，a cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
A. posted with instructions on the operation of the system
B. ventilated and equipped with explosion-proof switches
C. painted with red and black diagonal stripes
D. equipped with a battery powered source of emergency lighting
[单项选择]When starting a reciprocating pump, the inlet valve should be （）.
A. closed
B. opened fully
C. cracked open
D. partly open
[单项选择]The period when both inlet valves and exhaust valves are open is referred to as （）.
A. valve loop
B. valve uniflow
C. valve overlap
D. valve grinding
[单项选择]The primary function of a fuel delivery check valve assembly is to（）
A. deliver proper fuel quantity to the injection nozzle
B. provide rapid fuel injection cutoff
C. control fuel quantity entering the pump body
D. control fuel pressure delivered to the combustion chamber
[单项选择]What is the purpose of pressure-vacuum relief valves? （）
A. Regulation of discharge pressure from cargo pumps
B. Maintaining constant velocity in cargo lines
C. Regulation of suction head on cargo pumps
D. To maintain a tank or void at atmospheric pressure
[单项选择]In an ordinary four-stroke engine the exhaust valves open （）
A. after TDC
B. before TDC
C. after BDC
D. before BDC
[单项选择]In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.
A. downwards；upwards
B. upwards；downwards
C. downwards；downwards
D. upwards；upwards
[单项选择]The globe valve has a bulbous body, housing a valve seat and screw down plug or disc arranged at right angles to the axis of the pipeAccording to the above sentence, which of the following statements is not true?（）
A. The profile of the valve is like a globe
B. The valve seat is set into the bulbous body
C. The plug or disc of the valve is made vertical to the axis of the pipe
D. The valve seat is located at right side of the plug or disc
[单项选择]On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.
A. shut
B. fog
C. solid stream
D. spray
[单项选择]Admiralty Notices to Mariners，containing important information for the mariners and enabling them to keep their charts and books corrected for the latest information，are issued daily and published in（）.
A. Weekly Editions
B. Quarterly Editions
C. Annual Editions
D. Monthly Editions
[单项选择]When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.
A. attempt to isolate the fire from the LPG
B. cool the bottles or remove them from the fire area
C. see that the valves on all LPG bottles are closed
D. place insulating material over the bottles
[单项选择]The process during which liquid containing a reasonable amount of sensible heat at a particular pressure immediately changes into steam after admitted to a chamber at a lower pressure is called （）.
A. boiling off
B. flash evaporation
C. condensation
D. none of the above
[单项选择]The thermal expansion valve controls the amount of refrigerant that is allowed to flow to the （）.
A. compressor
B. cooling coils
C. condenser
D. receiver
[单项选择]The viscosity regulator controls the fuel oil temperature （） provide oil at the correct viscosity for combustion.
A. in order that
B. because of
C. in order to
D. owing to
[单项选择]Sweat damage will occur in a cargo hold containing machinery parts when（）.
A. the outside air is colder than the cargo
B. the air temperature of the hold is higher than the outside air temperature
C. the dew point of the hold is higher than the temperature of the cargo
D. the dew point of the outside air is lower than the temperature of the cargo
[单项选择]Controls for a fixed carbon dioxide system shall be mounted（）.
A. directly outside the space protected by the system
B. as near the gas cylinders as possible
C. in the pilothouse
D. on the main deck near the bow
