A cutoff valve in the fire-main system of a ship may be closed to protect the portion of the system on an exposed deck from().
- Adamage from crane operations
- Bbeing used for wash down purposes
- Caccidental diversion of flow to wrong location
- Dfreezing
A cutoff valve in the fire-main system of a ship may be closed to protect the portion of the system on an exposed deck from().
1、In a domestic fresh water system, the
In a domestic fresh water system, the pump starters are controlled by () switches which operate when the pressure in the tank varies within predetermined limits as water is drawn off.Awater levelBwater flowCtemperatureDpressure
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、A non-return valve in the air delivery
A non-return valve in the air delivery line near to the compressor must be ()type similar to the compressor discharge valve.Athe low inertiaBthe high inertiaCthe low velocityDthe high velocity
4、In a refrigeration system, if the cool
In a refrigeration system, if the cooling water to the condenser fails, the().Abox temperature solenoid valve will closeBexpansion valve will closeCcompressor will shutdownDking valve will ope
5、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
6、In setting the valves on a steam-smoth
In setting the valves on a steam-smothering system on a tanker,the master control valve to cargo tanks should be().Aopen and individual tank...