Hydraulic Systems Quiz

What is an indication that a filter needs to be replaced?

• Smaller dirt particles are removed from the air by the filter's element.

• The primary cause of pump cavitation is the suction line pressure is too low.

• Excessive back pressure.

• A slight glass in a reservoir usually indicates the level of the fluid.

What is the worst enemy of a hydraulic system?

• Stainless steel.

• Contamination.

• High pressure.

• Low viscosity.

What material is commonly used for tubing in high pressure hydraulic service?

• Aluminum.

• Copper.

• Stainless steel.

• Plastic.

What does a milky color in oil indicate?

• High temperature.

• Water contamination.

• Low viscosity.

• Excessive pressure.

What is a viscometer used for?

• Measuring the level of fluid.

• Measuring the viscosity of an oil.

• Measuring the temperature of an oil.

• Measuring the pressure of a fluid.

What should be done with an oil rag when finished using it?

• Dispose of it in an appropriate fireproof container.

• Wash it and reuse it.

• Leave it near the machine.

• Store it in a plastic bag.

What does a burner or pungent odor of oil indicate?

• Low viscosity.

• High pressure.

• Excessive temperature.

• Water contamination.

What is the most likely reason if the straight edge contacts only two of the four points after rotating one of the sheaves a partial turn?

• The shaft is bent.

• The sheaves are misaligned.

• The bearings are worn out.

• The motor is faulty.

What should be used to check for sheave wear?

• A viscometer.

• A straight edge.

• A sheave gauge.

• A dial indicator.

What is the function of a cam likely to be mounted on a shaft by means of a key and keyway?

• To measure viscosity.

• To align sheaves.

• To control timing.

• To prevent contamination.