If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump _____.
A.capacity will increase
B.capacity will decrease
C.suction pressure will increase
D.suction pressure will decrease

The most likely place for a fire to start through the process of spontaneous combustion is in _____.A.an electrical switchboardB.the pressure tanksC.the fuel oil tanksD.the oily rag bin

A.
A.an
B.the
C.the
D.the

点击查看答案&解析

Each hand portable，semi-portable and fixed fire extinguishing unit on a ship must be tested and inspected at least once every ______.A.six weeksB.six monthsC.twelve monthsD.two years

A.
A.six
B.six
C.twelve
D.two

点击查看答案&解析