LEVEL 1 MLT & MLA PRACTICE EXAM QUESTIONS
WITH 100% CORRECT ANSWERS WITH COMPLETE
SOLUTIONS |ALREADY GRADED A+ |LATEST
UPDATE
The primary reason that machinery is replaced is due to:
a) Erosion
b) Accidents
c) Obsolescence
d) Surface degradation of the metal
e) Corrosion - ANSWER - Answer: "d"
Wear is the primary cause of machinery replacement Surface degradation of the
metal includes all types of wear such as abrasion, adhesion, erosion, corrosion,
etc.
Which of the following is not a lubrication regime (mode / type)?
a) Boundary
b) Elastohydrodynamic
c) Boundary dynamic
d) Hydrodynamic
e) Mixed film - ANSWER - Answer: "c"
• Boundary lubrication is defined as that regime of lubrication in which the load is
carried by the surface asperities rather than by the lubricant
,• Elastohydrodynamic lubrication is a form of hydrodynamic lubrication (full film
separation). It is called elastohydrodynamic because the lubricated components
deform elastically due to high pressure as in antifriction bearings, gears and cams.
• Hydrodynamic lubrication is also called full film lubrication in which the load is
carried totally by the lubricant. The hydrodynamic film is a result of the relative
movement of surfaces and the viscous resistance of the lubricant
• Mixed film lubrication is a combination of full film and boundary lubrication. In
this type, the lubricant is insufficient to carry the load and provide full film
separation. Some points of contact still occur between surfaces.
Which maintenance strategy is based strictly on tasks performed at specific time
intervals?
a) Proactive
b) Predictive
c) Preventive
d) Percussive
e) Reactive - ANSWER - Answer: "c"
Preventive maintenance is time-based. Generally, this type of maintenance is not
cost-effective because parts are changed prematurely and failures occur due to
late or improper maintenance.
Condition-based maintenance:
a) is based on the condition of the equipment and the early detection of faults
b) is based on regular time-based overhauls
c) Is based on run to failure
d) is based on the condition of the oil and other root causes
,e) Answers an and d - ANSWER - Answer: "e"
Condition-based maintenance is often referred to as predictive maintenance
(Pd.M.) where the ultimate goal is to perform maintenance activity based on early
detection of problems using periodic or continuous monitoring, Obviously, (e) is
the correct answer, while (b) and (c) represent preventive and reactive
maintenance, respectively,
The Pareto Principle (80/20 Rule) states:
a) The largest beneficial effect is obtained from a critical few maintenance tasks
b) The largest beneficial effect is obtained from the (random) many maintenance
tasks
c) All machines die sometime
d) All bearings live forever
e) 80 percent of the people do 20 percent of the work - ANSWER - Answer: "a"
In general, the Pareto Principle states that, for many events, roughly 80 percent of
the effects come from 20 percent of the causes, so the correct answer is (a).
Which of the following is not a function of the lubricant?
a) Cool surfaces
b) Separate surfaces
c) Prevent corrosion
d) Repair surfaces
e) Provide some scaling - ANSWER - Answer: "d"
, The functions of a lubricant include controlling friction and wear by separating
surfaces in addition to cooling, corrosion prevention, sealing and transmitting
power in some applications such as hydraulic systems. The correct answer is (d),
as surface repair cannot be achieved using lubricants.
Which type or form of lubrication is considered to provide a full fluid (oil) film?
a) Elastohydrodynamic
b) Solid Film
c) Boundary
d) Mixed - ANSWER - Answer: "a"
Elastohydrodynamic lubrication is a form of hydrodynamic lubrication (full film
separation). It is called elastohydrodynamic because the lubricated components
deform classically due to high pressure.
Elastohydrodynamic lubrication (EHL) is considered to occur primarily in:
a) Piston rings and liners
b) Journal bearings
c) Rolling bearings, gears and cams
d) Slow-moving pins and bushings
c) Worm gears - ANSWER - Answer: "c"
EHL occurs in systems where the contact area is small and the pressure is high,
such as rolling clement bearings. gears (at the pitch line) and cams. The mating
surfaces deform elastically to enlarge the contact area, which is why it is called
clastohydrodynamic lubrication.
WITH 100% CORRECT ANSWERS WITH COMPLETE
SOLUTIONS |ALREADY GRADED A+ |LATEST
UPDATE
The primary reason that machinery is replaced is due to:
a) Erosion
b) Accidents
c) Obsolescence
d) Surface degradation of the metal
e) Corrosion - ANSWER - Answer: "d"
Wear is the primary cause of machinery replacement Surface degradation of the
metal includes all types of wear such as abrasion, adhesion, erosion, corrosion,
etc.
Which of the following is not a lubrication regime (mode / type)?
a) Boundary
b) Elastohydrodynamic
c) Boundary dynamic
d) Hydrodynamic
e) Mixed film - ANSWER - Answer: "c"
• Boundary lubrication is defined as that regime of lubrication in which the load is
carried by the surface asperities rather than by the lubricant
,• Elastohydrodynamic lubrication is a form of hydrodynamic lubrication (full film
separation). It is called elastohydrodynamic because the lubricated components
deform elastically due to high pressure as in antifriction bearings, gears and cams.
• Hydrodynamic lubrication is also called full film lubrication in which the load is
carried totally by the lubricant. The hydrodynamic film is a result of the relative
movement of surfaces and the viscous resistance of the lubricant
• Mixed film lubrication is a combination of full film and boundary lubrication. In
this type, the lubricant is insufficient to carry the load and provide full film
separation. Some points of contact still occur between surfaces.
Which maintenance strategy is based strictly on tasks performed at specific time
intervals?
a) Proactive
b) Predictive
c) Preventive
d) Percussive
e) Reactive - ANSWER - Answer: "c"
Preventive maintenance is time-based. Generally, this type of maintenance is not
cost-effective because parts are changed prematurely and failures occur due to
late or improper maintenance.
Condition-based maintenance:
a) is based on the condition of the equipment and the early detection of faults
b) is based on regular time-based overhauls
c) Is based on run to failure
d) is based on the condition of the oil and other root causes
,e) Answers an and d - ANSWER - Answer: "e"
Condition-based maintenance is often referred to as predictive maintenance
(Pd.M.) where the ultimate goal is to perform maintenance activity based on early
detection of problems using periodic or continuous monitoring, Obviously, (e) is
the correct answer, while (b) and (c) represent preventive and reactive
maintenance, respectively,
The Pareto Principle (80/20 Rule) states:
a) The largest beneficial effect is obtained from a critical few maintenance tasks
b) The largest beneficial effect is obtained from the (random) many maintenance
tasks
c) All machines die sometime
d) All bearings live forever
e) 80 percent of the people do 20 percent of the work - ANSWER - Answer: "a"
In general, the Pareto Principle states that, for many events, roughly 80 percent of
the effects come from 20 percent of the causes, so the correct answer is (a).
Which of the following is not a function of the lubricant?
a) Cool surfaces
b) Separate surfaces
c) Prevent corrosion
d) Repair surfaces
e) Provide some scaling - ANSWER - Answer: "d"
, The functions of a lubricant include controlling friction and wear by separating
surfaces in addition to cooling, corrosion prevention, sealing and transmitting
power in some applications such as hydraulic systems. The correct answer is (d),
as surface repair cannot be achieved using lubricants.
Which type or form of lubrication is considered to provide a full fluid (oil) film?
a) Elastohydrodynamic
b) Solid Film
c) Boundary
d) Mixed - ANSWER - Answer: "a"
Elastohydrodynamic lubrication is a form of hydrodynamic lubrication (full film
separation). It is called elastohydrodynamic because the lubricated components
deform classically due to high pressure.
Elastohydrodynamic lubrication (EHL) is considered to occur primarily in:
a) Piston rings and liners
b) Journal bearings
c) Rolling bearings, gears and cams
d) Slow-moving pins and bushings
c) Worm gears - ANSWER - Answer: "c"
EHL occurs in systems where the contact area is small and the pressure is high,
such as rolling clement bearings. gears (at the pitch line) and cams. The mating
surfaces deform elastically to enlarge the contact area, which is why it is called
clastohydrodynamic lubrication.
