单项选择题

Burning ( ), the oil provides the engine’s power.
A.in the piston
B.in the cylinder
C.in the bearing

A.
A.in
B.in
C.in
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单项选择题
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump _____.A.capacity will increaseB.capacity will decreaseC.suction pressure will increaseD.suction pressure will decrease
A.
A.capacity
B.capacity
C.suction
D.suction
单项选择题
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
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