The ratio of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, is called the().
- Aabsolute humidity
- Brelative humidity
- Cspecific humidity
- Dtotal humidity
The ratio of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, is called the().
1、Addition of weight above the center of
Addition of weight above the center of gravity of a vessel will always().Areduce initial stabilityBincrease righting momentsCincrease GMDAll of the above
2、The pitch ratio of a propeller is the
The pitch ratio of a propeller is the mean pitch divided by ().Athe propeller diameterBthe propeller radiusCthe pitch angleDthe length of helix
3、The ratio of the height of a vessel’s
The ratio of the height of a vessel’s rudder to its width is referred to as the().Aaspect ratioBconstriction ratioCrudder ratioDsteering ratio
4、The ratio of the work done by the mac
The ratio of the work done by the machine______________the work done on it is called the efficiency of the machine.AagainstBwithCtoDfor
5、Addition of weight above the center of
Addition of weight above the center of gravity of a vessel will ALWAYS().Areduce initial stabilityBincrease righting momentsCincrease GMDAll of the above
6、()indicates the weight of the vessel a
()indicates the weight of the vessel and is,therefore,according to a well known principle of physics,equal to the weight of the water it displaces.AGross tonnageBNet tonnageCDisplacement tonnageDDeadweight tonnage