The injector pump is operated by a cam which drives the plunger ().
- Atop and bottom
- Bto and fro
- Cup and down
- Dback and forth
The injector pump is operated by a cam which drives the plunger ().
1、When start a screw pump, the by pass v
When start a screw pump, the by pass valve should be ().AclosedBopened fullyCcracked openDpartly ope
2、The injector pump is operated by a cam
The injector pump is operated by a cam which drives () up and down.Athe needle valveBthe plungerCthe pistonDthe cylinder
3、The pressure head of a pump is given i
The pressure head of a pump is given in the unit of ().AkgBMPaCmeter fluid columnDNone of the above is true
4、When a boiler is operating, the water
When a boiler is operating, the water level in the gauge glass reads () when the boiler is shut down.Alower thanBhigher thanCas much asDthe same a
5、What is the operating principal of a f
What is the operating principal of a flash type evaporator?()ASea water is heated to boiling temperature under a vacuumBSea water is passed o...
6、() is usually driven by the engine cam
() is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.AAn air receiverBAn operating valveCAn automatic valveDAn air distributor