Lubrication TPC Flashcards
A thin layer of lubricant between 2 surfaces enables 1 surface to _______ another.
Slide over
By separating 2 surfaces slightly, a lubricant helps reduce _______.
Wear
An oil cooler radiates heat into the air, usually through:
Metal fins
At normal room temperature, grease is (a):
Semisolid
What are the 4 physical forms of lubricants?
Liquid, solid, gas, and semisolid
The most important property of a lubrication oil is its:
Viscosity
Viscosity of an industrial lubrication oil is measured in:
Saybolt Universal Seconds
Grease is used where liquid lubricant would leak or where frequent lubrication is not:
Possible
When water enters a system and gets churned up with oil, it creates a(n):
Emulsion
Grease is most commonly a __________ that has been thickened with _____.
Mineral oil; soap
Oil additives that react with metal to form a sulfide or chloride coating are called:
Extreme-pressure additives
In full-film lubrication, the moving surfaces are:
Completely separated from each other
Detergent dispersant additives are ______________ containing metallic elements
Organic Salts
Which type of additive is used to help a lubricant adhere better to metal surfaces?
Tackiness Agent
A major advantage of using grease as a bearing lubricant is that grease…
Acts as a seal for the bearing housing
Animal fat is sometimes included in ________________ oil to help it stick to the surface being lubricated.
Steam cylinder
The 4 basic conditions that determine lubricant choice are load, temp, speed, and _________.
Environment
What are the 2 most common additives used in general purpose oils?
Anti-oxidants and Rust preventitives
Paraffin-base oils have a ______ viscosity and a ______ pour point.
High; high
Naphthene-base oils are especially good lubricants for _________ because they contain little to no wax.
Refrigeration
The function of soap in the grease is to:
Hold the oil
Calcium-soap greases begin to ________ if the temp rises above 180 degrees
Dry-out
Non-soap bases for greases include:
Clay minerals, gels, and organic complexes
Most greases contain from ______ to ______% oil.
70-90%
Greases are classified by their:
Type of thickener
The ability of an EP grease to overcome short-cycle, high load conditions depends on the ________ of the ______.
Film strength; oil
The primary charateristic of calcium-soap greases is their resistance to ______.
water
The particles of “lamellar” additives are _________ in shape.
Thin and flat
What is the most common additive used to give multi-purpose grease EP characteristics?
Sulfurized oil
Which type of binding agent works best with dry film lubricants at temps over 600degrees F?
Ceramic
One of the operating requirements of a lubricating device is its ability to:
Regulate lubricant flow
Drip feeding oiling depends of ______ for its operation
Gravity
The sump for a splash or ring-type natural lubrication system is:
Part of the machine housing
Mist lubrication systems are similar in operation to air line lubrication, but they handle _____ lubricant at ______ pressure
More; lower
Drip-feed greaser is _____ a method of manual grease lubrication.
True or False?
NOT; true
In a 2-line header lubrication system, the control valve:
Reverses the lubricant flow
The tapered tube sight-glass can show the lubricant:
Flow AND flow rate
The parallel tube sight-glass can show the lubricant:
FLOW ONLY
In a single-line header lubrication system, lubricant is supplied to the metering device by the _____.
Pump
In a progressive metering system, additional outlets can be added ______ at a time.
2
Used lubricating oils can be made suitable for re-use by purification or :
Reclamation
Final filtering of fluids can be accomplished by using:
Sintered material
Lubricants stored outside during cold weather must be ____________ before use.
Brought inside for several days
To purify lubricants, a centrifuge uses _______ to separate the water and oil.
Disks
What is the difference between a centrifugal purifier and clarifier?
Clarifier does not remove water
The main purpose of using route sheets for all lubricators is to:
Make sure all lubrication is performed
One of the best ways to prevent lubricators from using wrong lubricant is to provide:
Color-coded fittings on the equipment
The first step in computerizing a plant’s lubrication program is to:
Survey all lubrication requirements
On a lubrication survey form, the _____________ tells the order in which machines appear on a route.
Sequence number
A lubrication program change notice alerts the maintenance department that the:
Required oil change is due
