Fluids and Lubrication Flashcards
What is the primary purpose of hydraulic fluid in a system?
a) To transmit power
b) To lubricate moving parts
c) To cool components
d) All of the above
d) All of the above
Which property of oil determines its flow rate?
a) Viscosity
b) Density
c) Flash point
d) Specific gravity
a) Viscosity
What is the primary function of a lubricant in a gearbox?
a) Prevent overheating
b) Minimize wear and tear
c) Increase torque
d) Secure gears
b) Minimize wear and tear
What is a common sign of lubricant contamination?
a) Increased system noise
b) Sludge buildup
c) Reduced efficiency
d) All of the above
d) All of the above
Which type of grease is commonly used for high-temperature applications?
a) Calcium-based
b) Lithium-based
c) Sodium-based
d) Polyurea-based
d) Polyurea-based
What does an oil analysis test for?
a) Viscosity and contamination
b) Density and pH
c) Flash point and tensile strength
d) Specific gravity and alkalinity
a) Viscosity and contamination
What is the purpose of a hydraulic filter?
a) Increase fluid pressure
b) Remove contaminants from the fluid
c) Cool the hydraulic system
d) Add viscosity to the fluid
b) Remove contaminants from the fluid
Which type of lubrication system continuously supplies oil to moving parts? a) Manual lubrication
b) Centralized lubrication
c) Splash lubrication
d) Drip lubrication
b) Centralized lubrication
What is the purpose of an oil reservoir in a hydraulic system?
a) Store excess fluid
b) Allow heat dissipation
c) Provide fluid to the pump
d) All of the above
d) All of the above
What is the function of a pressure relief valve in a hydraulic system?
a) Maintain system pressure
b) Prevent over-pressurization
c) Increase flow rate
d) Reduce friction
b) Prevent over-pressurization
What type of lubrication method uses compressed air to deliver oil mist?
a) Manual lubrication
b) Centralized lubrication
c) Mist lubrication
d) Drip lubrication
c) Mist lubrication
What property of a lubricant is most critical for high-speed applications?
a) Low viscosity
b) High thermal stability
c) High density
d) Low flash point
a) Low viscosity
Which tool is commonly used to measure the viscosity of a fluid?
a) Pyrometer
b) Viscometer
c) Hydrometer
d) Manometer
b) Viscometer
What does a pressure gauge in a hydraulic system measure?
a) Fluid flow rate
b) System pressure
c) Fluid temperature
d) Fluid level
b) System pressure
Which type of pump is commonly used in lubrication systems?
a) Centrifugal pump
b) Gear pump
c) Piston pump
d) Diaphragm pump
b) Gear pump
What is the primary function of a splash lubrication system?
a) Distribute lubricant by splashing it onto moving parts
b) Increase fluid pressure
c) Store lubricant for future use
d) Reduce fluid temperature
a) Distribute lubricant by splashing it onto moving parts
Which type of lubrication is commonly used for open gears?
a) Spray lubrication
b) Oil bath lubrication
c) Grease lubrication
d) Drip lubrication
c) Grease lubrication
What type of lubricant is best suited for high-temperature environments?
a) Water-based lubricant
b) Silicone-based lubricant
c) Lithium grease
d) Petroleum oil
b) Silicone-based lubricant
What is the purpose of an oil viscosity index?
a) Measure oil density
b) Indicate oil performance under temperature changes
c) Determine oil pressure requirements
d) Measure contamination levels
b) Indicate oil performance under temperature changes
Which type of lubricant is typically used for chains in dusty environments?
a) Dry film lubricant
b) Grease
c) Silicone oil
d) Mineral oil
a) Dry film lubricant
Which type of lubrication system is commonly used for high-speed spindles?
a) Mist lubrication
b) Grease lubrication
c) Splash lubrication
d) Drip lubrication
a) Mist lubrication
What is the function of a grease zerk fitting?
a) Provide a sealing mechanism
b) Allow the injection of grease into a bearing or joint
c) Control fluid pressure
d) Align moving parts
b) Allow the injection of grease into a bearing or joint
What type of lubricant is recommended for a heavily loaded, slow-moving gear system?
a) High-viscosity oil
b) Light machine oil
c) Silicone grease
d) Dry film lubricant
a) High-viscosity oil
Which type of grease is best for high-speed applications?
a) Calcium-based grease
b) Lithium-based grease
c) Molybdenum disulfide grease
d) Graphite-based grease
b) Lithium-based grease
What is the primary purpose of an oil level sight glass in a gearbox?
a) Measure oil temperature
b) Allow visual inspection of oil level
c) Prevent oil contamination
d) Reduce oil pressure
b) Allow visual inspection of oil level
