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MLT Exam Questions.
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Exam of 23 pages for the course 126 MTTC English as a Second Language at 126 MTTC English as a Second Language (MLT Exam Questions.)
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MLT Exam QuestionsThe primary reason that machinery is replaced is due to:
A. Erosion
B. Accidents
C. Obsolescence
D. Surface degradation of the metal
E. Corrosion - ANS-D. Surface Degradation of the Metal
Which of the following is not a lubrication regime (mode/type)?
A. Boundary
B. Elastohydrodynamic
C. Boudarydynamic
D. Hydrodynamic
E. Mixed film - ANS-C. Boundrydynamic
Which maintenance strategy is based strictly on tasks performed at specific time
intervals?
A. Proactive
B. Predictive
C. Preventive
D. Percussive
E. Reactive - ANS-C. Preventive
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 a and d - ANS-E:
Answers A (Is based on the condition of the equipment and the early detection of
Faults)
&
D (Is based on the condition of the oil and other root causes)
,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 last forever.
E. 80 percent of the people do 20 percent of the work. - ANS-A. The largest beneficial
effect is obtained from a critical few maintenance tasks
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 sealing - ANS-D. Repair surfaces
Which type or form of lubrication is considered to provide a full fluid (oil) film?
A. Elastohydrodynamic
B. Solid film
C. Boundary
D. Mixed
E. All of the above - ANS-A. Elastohydrodynamic
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
E. Worm gears - ANS-C. Rolling bearings, gears, and cams
The oil film thickness (or dynamic operating clearance) in operating bearings:
A. Cannot be determined
B. Is about 10 microns for journal bearings (although can vary considerably)
C. Is about a micron for rolling bearings
D. Is not measurable
, E. Answers b & c - ANS-E.
Answers B (Is about 10 microns for journal bearings (although can vary considerably))
&
C ( Is about a micron for rolling bearings)
Which is not a type of base oil (base stock)?
A. Mineral
B. Synthetic
C. Antioxidant
D. Vegetable
E. Group III synthetic - ANS-C. Antioxidant
Benefits generally associated with the use of synthetics include:
A. Better oxidation resistance
B. Better compatibility with elastomers (seals)
C. Less toxicity
D. Higher cost
E. Better paint compatibility - ANS-A. Better Oxidation Resistance
PAO synthetic base oils:
A. Offer the best additive solubility
B. Are the prime choice for fire resistance
C. Have better oxidation stability than mineral oils
D. Are incompatible with mineral oils
E. Offer the very best high-temperatures stability - ANS-C. Have better oxidation
stability than mineral oils
Polyglycol (PAG) synthetic oils:
A. Offer the best additive solubility
B. Are the prime choice for fire resistance
C. Have better oxidation stability than mineral oils
D. Are incompatible with mineral oils
E. Offer the very best high-temperatures stability - ANS-D. Are incompatible with
mineral oils
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