Millwright-Preventive and Predictive Maintenance Questions & Answers 100% Accurate
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Course
Millwright
Institution
Millwright
Preventive maintenance - ANSWER-is the periodic inspection and maintenance of plant assets and equipment to uncover conditions that may to equipment failure or shortened life
This measures the amount of contaminants per litre of fluid.
a. ferromagnetic analysis
b. total base number
c. infrare...
Millwright-Preventive and Predictive
Maintenance Questions & Answers 100%
Accurate
Preventive maintenance - ANSWER-is the periodic inspection and maintenance of plant
assets and equipment to uncover conditions that may to equipment failure or shortened
life
This measures the amount of contaminants per litre of fluid.
a. ferromagnetic analysis
b. total base number
c. infrared tests
d. gravimetric level analysis - ANSWER-d. gravimetric level analysis
These tests indicate how much of the oil additives have been depleted
a. ferromagnetic analysis
b. total base number
c. spectographic level analysis
d. gravimetric level analysis - ANSWER-b. total base number
This technique is advanced and becomming more common in industry. It determines
concentrations of contaminants over a period and accurately predicts the lubricant
failure.
a. ferromagnetic analysis
b. total base number
c. spectographic level analysis
d. gravimetric level analysis - ANSWER-c. spectographic level analysis
These tests reveal the amount of general oil degradation.
a. ferromagnetic analysis
b. infrared
c. spectographic level analysis
d. gravimetric level analysis - ANSWER-b. infrared
What is a method of determining the condition of lubrication or hydraulic oil? -
ANSWER-Particle Analysis
Automatic particle counters APCs or laser particle sizing APS can determine particle
size and distribution
, What is one of the most expensive and dangerous methods of NDT? - ANSWER-Using
X-Rays
Harmful gamma and xrays
What two kinds of Ultra-Sonic inspection are used in Millwright trade? - ANSWER-
Immersion and Contact
Scale, paint and corrosion removal may be required before inpsection
Static unbalance is sometimes called (this is when the weighted centerline and shaft
axis are parallel but misaligned (shifted) along their length
a. force or kinematic unbalance
b. couple unbalance
c. misalignment
d. shaft offset - ANSWER-a. force or kinematic unbalance
This is caused when shafts weight is evenly distributed along its length but unevenly
distributed side to side
This type of unbalance has extra equal weights on opposite sides of the shaft. (6 oclock
and 12 oclock) This causes the weighted centerline of the rotating part to intersect the
shaft axis.
a. force or kinematic unbalance
b. couple unbalance
c. quasi static
d. shaft offset - ANSWER-b. couple unbalance
detailed analysis - ANSWER-All good PM programs begin with a ________ of past
equipment failures, including their costs, causes, remedial actions taken, and changing
demands on the equipment.
critical, important, and nonthreatening - ANSWER-Three catagories of equipment
failures:
Nondestructive testing - ANSWER-NDT
Nondestructive evaluation - ANSWER-NDE
How is couple unbalance detected?
a. when shaft is rotated and 180* phase angle is indicated between ends of arbor
b. when shaft is rotated and 180* phase angle is indicated between ends of rotor
c. when shaft is rotated and 270* phase angle is indicated between ends of rotor
d. when shaft is rotated and 270* phase angle is indicated between ends of arbor -
ANSWER-b. when shaft is rotated and 180* phase angle is indicated between ends of
rotor
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