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Troubleshooting > Chapters 5-9 > Flashcards

Chapters 5-9 Flashcards

0
Q 
A branch of mathematics designed to draw conclusions from data that have been collected, organized, and subject to analysis.
A. Algebra 
B. Statistics 
C. Chemistry 
D. Probabilities
A

B. Statistics

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1
Q

Numbers that cluster around the “middle” group of values.

A. Middle B. Central Tendency C. Cluster D. Trend

A

B. Central Tendency

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2
Q

A group of “phenomena,” or numbers that have something in common.
A. Population B. Groups C. Central Tendency D. Mean

A

A. Population

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4
Q 
A mathematical function based on the deviations of a set of numbers from the mean.
A. Upper Control Limit 
B. Lower Control Limit 
C. Variance 
D. Standard Deviation
A

C. Variance

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4
Q

One standard deviation contains __% of measurements, two standard deviations contain __% of measurements, and three standard deviations contain __% of measurements.

A

68 - 95 - 99.7

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5
Q 
Square root of the variance
A. Upper Control Limit 
B. Lower Control Limit 
C. Variance 
D. Standard Deviation
A

D. Standard Deviation

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6
Q

SPC

A

Statistical Process Control

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7
Q

(T/F) Accurate data collection is critical to statistical analysis.

A

True

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8
Q 
A bar chart that identifies the defects in order of occurrence from the largest to the smallest.
A. Pareto Chart 
B. Pie Chart 
C. Scatter Chart 
D. Trend Chart
A

A. Pareto Chart

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9
Q

Flow charts are constructed by:
A. identify the process and boundaries
B. develop a high-level flow chart first to see the big picture
C. validate the flow chart with the organization
D. all of the above

A

D. all of the above

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10
Q 
A picture of key activities that take place in a process.
A. Pareto Chart 
B. Pie Chart 
C. Flow Chart 
D. Trend Chart
A

C. Flow Chart

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12
Q 
Determines a cause-effect relationship between two variables, where an dependent variable depends on an independent variable.
A. Scatter Diagram 
B. Pareto Diagram 
C. Standard Deviation 
D. Moving Range Diagram
A

A. Scatter Diagram

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12
Q

(T/F) Variability occurs in every process. It can be caused by equipment wear, environment, operator malfunctions, or management.

A

True

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13
Q 
Plots data, such as a PV, over time.
A. Run Chart 
B. Trend Chart 
C. Pareto Chart 
D. Scatter Chart 
E. A and/or B 
F. None of the above
A

E. A and/or B

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14
Q

(T/F) If variation can be attributed to an assignable cause, the process is in control.

A

False - it is out of control

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15
Q

A cause of unpredictable variation that can be identified using structured techniques.
A. Assignable Cause
B. Natural Cause
C. Chance Cause

A

A. Assignable Cause

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16
Q

(T/F) Any data point outside of +/- 3 sigma is likely due to an assignable cause.

A

True

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17
Q

(T/F) It is important to collect data on a heat exchanger on a regular basis. A gradually increasing dP across the exchanger may indicate fouling.

A

True

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18
Q

(T/F) Exchanger rarely foul over time, so there is not need to clean them during shutdowns.

A

False - ALL exchangers foul over time and should be cleaned.

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20
Q 
Operator response to trends of data should be \_\_\_\_\_\_ through training and experience.
A. monitored 
B. assumed 
C. standardized 
D. none of the above
A

C. standardized

21
Q 
Take \_\_\_\_ readings and log any unusual deviations.
A. accurate 
B. approximate 
C. estimated 
D. normal
A

A. accurate

22
Q 
To be a good troubleshooter, you should:
A. know the equipment 
B. understand instrumentation 
C. be familiar with past problems
D. discuss problems with fellow operators 
E. all of the above
A

E. all of the above

23
Q 
\_\_\_\_\_ is the best teacher, but modern computer technology can help track down problems.
A. Money 
B. Management 
C. Experience 
D. Mr. Reader
A

C. Experience

24
Q

The first problem that created a process upset (root cause)
A. Primary problem
B. Secondary problem

A

A. Primary problem

25
Q

Created by or respond to the primary problem.
A. Primary Problem
B. Secondary Problem

A

B. Secondary Problem

25
Q

The percentage of fluid that leaks or slips past the internal clearance of a pump over a given time.

A

Slip

26
Q 
The pumping system in our book mixed which items?
A. Butane 
B. Pentane 
C. Liquid Catalyst 
D. A&B 
E. B&C 
F. A,B,&C
A

F. A,B,&C

27
Q

What kind of pump is a centrifugal?

A

Dynamic

28
Q

(T/F) Slip allows a control valve to regulate or throttle flow without damaging the equipment.

A

True

29
Q

NPSH

A

Net Positive Suction Head

30
Q

Low NPSH can cause ____.

A

cavitation

31
Q

Mass per unit volume

A

Density

32
Q 
Variables that affect centrifugal pump operation:
A. temperature 
B. tank level 
C. restrictions 
D. downstream pressure 
E. all
A

E. all

33
Q

Density of a liquid relative (divided by) the density of water

A

Specific Gravity

34
Q

PSI at sea level

A

14.7 PSIA

35
Q 
Water Density
A. 1.23 lbs/gal 
B. 8.33 lbs/gal 
C. 5 lbs/gal
D. 1 lbs/gal
A

B. 8.33 lbs/gal

36
Q

Force per unit area

A

PSI

37
Q

Two most common types of pressure

A

Atmospheric - sea level is 14.7 PSIA

Hydrostatic - pressure exerted by a level of a liquid

38
Q

As pressure increases, the volume of gas _____.

A

decreases

39
Q

As pressure decreases, the volume of gas ______.

A

increases.

40
Q

A substance with low vapor pressure will have a (low/high) boiling point?

A

high

41
Q

As pressure increases,
A. the boiling point increases
B. gas or vapor molecules are forced closer together
C. the vapor phase above the liquid could be forced back into solution
D. all of the above

A

D. all of the above

42
Q

And pressure below atmospheric pressure.

A

Vacuum

43
Q

A system run under a vacuum (increases/reduces) the boiling point of liquids. This can save energy costs in a distillation process.

A

reduces

44
Q

The total pressure of a gas mixture is the sum of the pressures (partial pressures) of the individual gases. P(total) = P1 + P2 + P3 ….

A

Dalton’s Law

45
Q

Why do multi-stage compressors have cooling between stages?

A

to remove the heat of compression

46
Q

A multi-stage compressor with a 3.2 compression ration would product what pressure as it exits stage 2?

A

150 PSIA
exit stage 1 at 47PSIA (14.7 * 3.2)
exit stage 2 at 150PSIA (47 * 3.2)

47
Q 
Which of the following are positive displacement compressors?
A. reciprocating
B. rotary
C. centrifugal
D. A&B
A

D. A&B

Troubleshooting (4 decks)

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