Limit switches are used on which davit

1、On which type davit does the davit hea

On which type davit does the davit head stay at the same height?（）ARadialBSheath-screwCQuadrantalDGravity

2、（） are used to limit the pressure in a

（） are used to limit the pressure in any particular portion and mainly control the pressure after the valve.ARelief valvesBCheck valvesCSafety valvesDReducing valve

3、The type of davit on which you must tu

The type of davit on which you must turn a crank in order to swing the lifeboat out over the ship’s side is a（）.Asheath-screw davitBgravity davitCradial davitDbruckner davit

4、Which are valid modes for a switch por

Which are valid modes for a switch port used as a VLAN trunk (Choose three.)（）。AtransparentBautoConDdesirableEblockingFforwarding

5、The limit switches on a ships survival

The limit switches on a ships survival-craft winch system（）.Astop the winch just before the craft reaches the final stowage positionBlimit the amount of cable on the drumClimit the ascent rateDstop the winch in case the craft weighs too much

6、Isobars on a synoptic chart are useful

Isobars on a synoptic chart are useful in predicting（）.AtemperatureBdew pointCwind velocityDrelative humidity