If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an （）
1、If the compensating needle valve of a
If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will （）Ahave a larger than normal dead b...
2、In setting the valves on a steam-smoth
In setting the valves on a steam-smothering system on a tank vessel，the master control valve to cargo tanks should be（）.Aopen and individual...
3、Safety valves on a boiler vent to the
Safety valves on a boiler vent to the （）.Afuel tankBbilgeCatmosphereDauxiliary exhaust line
4、The expansion valve on a Freon system
The expansion valve on a Freon system controls the （）.Asuperheat of the gas leaving the compressorBback pressure in the evaporatorCtemperature of the iceboxDsuperheat of the gas leaving the evaporator
5、If all OSPF routers in a single area a
If all OSPF routers in a single area are configured with the same priority value,what value dose a router use for the ODPF router ID in the...
6、A relief valve for a cargo pump is gen
A relief valve for a cargo pump is generally installed（）.Aafter the discharge valveBbetween the pump and discharge valveCafter the suction valveDbetween the pump and suction valve