The internal part of boiler should be

1、The （） of the main shaft should be mea

The （） of the main shaft should be measured with a （）.Aclearance；calipersBsinking；bridge gaugeCdiameter；bridge gaugeDclearance；lead wire

2、Which of the actions listed should be

Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?（）ACommence draining that tank as quickly as possibleBSeal off all vents to that tankCActivate the CO2 system to that tankDShut off the steam heating coil

3、The tube in a boiler should be blinded

The tube in a boiler should be blinded if found （）.AscaledBinformedCleakyDdeformed

4、The （） of the lubricant should be suff

The （） of the lubricant should be sufficient to hold the film together, but it should allow the lubricant to flow easily.Aspecific gravityBviscosityCacid valueDcalorific value

5、The shaft and spare parts（） should be

The shaft and spare parts（） should be well greased in order to avoid corrosion.Ain the store roomBin the cylinderCin the scavenge air boxDin the water box

6、The internal part of boiler should be

The internal part of boiler should be welded by yard if found （）.AsealedBcrackedCshape changedDdeformed