A swing check valve is used in a pipeline to ().
- Amaintain a preset pressure on the line
- Bclosely regulate the amount of flow
- Crelieve excessive pressure on the line
- Dallow flow in one direction only
A swing check valve is used in a pipeline to ().
1、When a magnetic compass is not in use
When a magnetic compass is not in use for a prolonged period of time it should().Abe shielded from direct sunlightBbe locked into a constant headingChave any air bubbles replaced with nitrogenDhave the compensating magnets removed
2、A magnetic strainer is used in the die
A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of().AwaterBbabbittCiron or steelDacid
3、In which solution is a router ACL used
In which solution is a router ACL used?()A protecting a server frome unauthorized accesB controlling path selection,based on the route metricC reducing router CPU utilizationD filterring packets that are passing through a router
4、An orifice-check valve placed in a hyd
An orifice-check valve placed in a hydraulic system is used to()Aregulate the fluid flow in either directionBrestrict movement of hydraulic flu...
5、The needle valve in a fuel valve will
The needle valve in a fuel valve will () when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.Abe jammedBbe openedCbe seatedDbe broke
6、● (73) is a method used in Critical Pa
● (73) is a method used in Critical Path Methodology for constructing a project schedule network diagram that uses boxes or rectangles, refe...