The internal force of a material, which tends to resist deformation when subjected to external forces, is known as ().
- Astress
- Bstrain
- Cshear strength
- Dultimate tensile strength
The internal force of a material, which tends to resist deformation when subjected to external forces, is known as ().
1、The suction - force principle of opera
The suction - force principle of operation is a typical characteristic of ().Acentrifugal pumpsBjet pumpsCpropeller pumpsDreciprocating pum
2、Which of the materials listed is used
Which of the materials listed is used as the dynamic seal material on mechanical seals installed on most centrifugal pumps used in water service?()ACopperBCopper and carbonCCarbonDBronze
3、In the presence of external forces,the
In the presence of external forces,the center of buoyancy of an inclined vessel is vertically aligned with the().Acenter of gravityBmetacenterCcenter of flotationDkeel
4、In the absence of external forces,the
In the absence of external forces,the center of buoyancy of an inclined vessel is vertically aligned directly below the().Acenter of gravityBamidships stationCcenter of flotationDgeometric center of the waterplane area
5、Under the forces of its own weight,the
Under the forces of its own weight,the suspended length of line will fall into a shape known as a().ApolygonBholding arcCcatenary curveDparabolic curve
6、The directive force of a gyrocompass()
The directive force of a gyrocompass().Aincreases with latitude,being maximum at the geographic polesBdecreases with latitude,being maximum at t...