Before starting an air compressor, It

1、Open the （）before starting an air comp

Open the （）before starting an air compressor.Aunload valveBcooling waterCoil cupDsum

2、If an air compressor is used to supply

If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the （）.Acontrol air systemBforced draft air systemCsupply air systemDships service air system

3、Before hydraulic starting of an engine

Before hydraulic starting of an engine on a covered lifeboat，what need NOT be checked?（）AFuel supply line valveBPressure registered on the accumulator gaugeCCold-spark voltage readings test lampDEngine stop control

4、A person may operate an air compressor

A person may operate an air compressor in which of the following areas on board a tank barge?（）APumproomBGenerator roomCA space adjacent to a cargo tankDA space two meters from a cargo valve

5、Before starting an air compressor, It

Before starting an air compressor, It should be （）.AturnedBoil level checkedCfilled with waterDA and B

6、The compressor in an air-cooled conden

The compressor in an air-cooled condensing refrigeration system is short cycling on the high pressure cutout switch（）Asystem is overcharged with...