1.
What is equipment health monitoring?
Conditions monitoring is one of the maintenance methods which
are used to assess the health and condition of equipments machines, systems or
process by absorbing checking, measuring and monitoring several parameters.
This technique is also called as equipment health monitoring.
2.
List down the factors for increasing the demand
condition monitoring
1.
Increased quality expectations reflected in
produces liability legislation
2. Increased automation to
improve profitability and maintain competitiveness
3.
Increased safety and reliability expectations
4.
Increased cost of maintenance due to labour and
material cost.
3.
List down the key features of condition
monitoring.
1.
Links between cause and effect
2.
Systems with sufficient response
3.
Mechanisms for objective data assessment
4.
Benefits outweighing cost
5.
Data storage and review facilities.
4.
Write down the basic steps in condition
monitoring.
1.
Identifying critical systems
2.
Selecting suitable techniques for condition
monitoring
3.
Setting baselines
4.
Data collection
5.
Data assessment
6.
Fault diagnosis and repair
7.
System review
5.
What are three types of condition monitoring
a.
Subjective condition
monitoring b. Minimized breakdown costs
c.
Improved morality of the operating personnel and
safety.
6.State
the advantages and disadvantages and disadvantages of condition monitoring.
Advantages
1.
Improved availability of equipment
2.
Minimized breakdown cost
3. Improved
reliability Disadvantages
1.
Gives only marginal benefits
2.
Increased running cost
3.
Sometimes difficult to organize
7.
Mention the various costs involved in costing of
condition monitoring mainly I. Installation cost
II.
Operating cost
8.
State the methods of measuring vibration
a.
Amplitude
b.
Frequency
c.
Phase
9.
Name the types of pyrometers.
1.
Total radiation pyrometers
2.
Infra red pyrometers
3.
Optical radiation pyrometers
10.Mention the application of
bimetallic strip.
1.
Bimetallic strips are frequently used in simple ON
– OFF
switches.
2.
The bimetal strips are also used in control
switches.
11.List down the features of RTD.
1.
High degree of accuracy
2.
Resistance thermometer is interchangeable in a
process without compensation or recalibration.
12.State the application and
limitation of thermisters. Applications:
1.
It is used for varying temperatures
2.
it is used in time delay circuits
3.
Thermistors are used for temperature compensation.
13.What are two main types of
infrared themography?
1. Passive
thermography
2.
Active thermography
14.What are the principles very important for the
study of eddy current test .
i.
Permeability
ii.
Conductivity
iii.
Material thickness
iv.
Edge effect and end effect
v.
Lift off
vi.
Fill factor
15.Describe
the limitation of eddy current test.
The main limitation is the low penetration of parts being
examined, using limited to thin walls or near surface flaws. It is difficult to
use on ferromagnetic materials. False indications are possible because of mixed
variables, edge effects and lift-off effects. Extensive technical knowledge is
required for the development of inspection procedures, specific probes and to
interpret the inspection data.
16.Mention th effect of X-rays to human body?
Injuries to superficial tissue
II.
General effects on the body, particularly the
blood forming organs; eg. Producers of anema and leukerma
III. Induction of mahgnant tumors.
IV. Genetic effects.
17.What are the limitations of ultrasonic test?
a.
Unfavorable geometries and coarse anisotropic
grain structures are difficult to inspect.
b.
extensive technical knowledge is required for the
development of inspection procedure.
c.
Parts that are rough, irregular in shape, very
small or thin or not homogenous are difficult to examine, specific probes and
to interpret the inspection data.
18.Name some of the methods of leakage monitoring.
1.
Interstitial monitoring
2.
level monitoring
3.
Vapor monitoring
4.
Liquid Monitoring
19.Define see back effect?
The basic
principle of thermocouple is ‘when two dissimilar metals
are joined together and emf will exist between the two points A and B, which is
primarily a function of the junction temperature. The above said to be
principle of see back effect.
20.State the various methods of corrosion
monitoring?
d.
Weight loss method
e.
Electrical resistance method
f.
linear polarization method
g.
corrosion potential measurement
h.
Ultrasonic testing
i.
Sentinel hole method.
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