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INST 257 > Midterm > Flashcards

Midterm Flashcards

1
Q

An example of a primary sensing element is:

A

an RTD

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2
Q

A device that converts process span value to 4-20 mA is called a:

A

a transmitter

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3
Q

The LRV and URV of a process that ranges from 300C to 500C, and represented by a standardized electronic transmitter would be:

A

4mA= 300C 20mA = 500C

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4
Q

The LRV and URV of a process that ranges from 300C to 500C - The zero and span would be:

A

zero = 300C span = 200C

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5
Q

What device sends out a correcting signals?

A

a controller

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6
Q

A process variable is defined as:

A

the variable that is a part of the process and contributes to its overall characteristic.

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7
Q

The variable that is required to be controlled is called

A

the setpoint

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8
Q

If we return the control function of a controller in a loop, we may say the process is under:

A

automatic control

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9
Q

What is the process variable in this case?

A

chlorine concentration

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10
Q

Why is a motor driven valve used?

A

It allows a slow accurate movement of the valve stem

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11
Q

The manipulated variable is:

A

flow rate of chlorine supply

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12
Q

The manipulated variable is measured

A

False

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13
Q

In which of the following regulations or codes can you find rules for Personal Protective Equipment?

A

OH&S

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14
Q

The Association of Sciences and Engineering Technology Professionals of Alberta

A

Works with other Association Professionals to approve membership in it’s organization.

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15
Q

The purpose of instrumentation standards, codes, regulations and rules is to:

A

provide a means of conducting a safe, efficient and common work environment in instrumentation

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16
Q

An Act is a ___________ passed by parliament to provide for a safe working environment.

A

law

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17
Q

What organization regulates the use of a pressure safety valve ( PSV ) in Alberta?

A

ABSA

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18
Q

Where can the regulations or codes be found which deal with rules for Area Classification of Hazardous locations?

A

CEC

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19
Q

What is AGA 3 used for?

A

To standardize the measurment of gas flow across an orifice plate.

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20
Q

Where would you go to find information on standards for control signals?

A

ISA

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21
Q

Where would you go if you wanted to know about safe working practices on the job site?

A

Alberta Occupational Health and Safety

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22
Q

A question came up about what color the ground wire should be in a service panel. We would consult:

A

Canadian Electric Code

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23
Q

What section in the CEC covers hazardous locations

A

18

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24
Q

What does the following acronym symbolize: I/S

A

instrument air supply

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25
Q

What is the main difference between Smartplant P&ID and Visio?

A

Smartplant P&ID is a server, rule based progam; while Visio is a stand alone program.

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26
Q

Which of the following drawings show the greatest amount of detail?

A

Loop drawings

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27
Q

The type of bubble or the lines within the bubble, representing a field device, indicates its :

A

location

28
Q

All instruments, even indicators, used in a loop drawing, have:

A

an input and output.

29
Q

What two elements are used to sense a possible surge condtion?

A

FE-42 PDT-42

30
Q

What does this symbol represent?

A

A magnetic flowmeter

31
Q

What does this symbol represent?

A

A failed locked position control valve

32
Q

What does the “P” mean in this drawing?

A

The valve has a positioner attached to it.

33
Q

What does this symbol represent?

A

A Turbine Meter

34
Q

What type of drawing is shown below?

A

Functional

35
Q

What does this symbol represent?

A

Control valve with handjack

36
Q

What does this symbol represent?

A

Pressure Regulator

37
Q

What does the following symbol represent?

A

Indicator

38
Q

What does FSHH mean?

A

Flow Switch High High means an alarm is sent and an automatic shutdown is initiated

39
Q

What type of drawing illustrates the algorithms used in a control systems, rather than the physical components

A

Functional diagram

40
Q

What can be said about this device?

A

It has a range of 20 - 4 mA output

41
Q

What does the following symbol represent?

A

caplillary connection

42
Q

Which symbol indicates a discrete instrument mounted on the front of a panel in the main control room?

A

A

43
Q

Describe this valve:

A

Fail open

44
Q

Name the instrument that can show and record process variables over time.

A

Recorder

45
Q

What symbol is used in a drawing to represent at pneumatic control signal?

A

a thin solid line periodically spaced double hatch marks

46
Q

Variable speed drive motors are examples of what part of the process control loop?

A

final control element

47
Q

Which number represents the flow transmitter?

A

1

48
Q

Which number represents the function block wherein the measured quantity is compared to the set point?

A

2

49
Q

Which number represents a standard signal?

A

3

50
Q

What number represents the effect that the final control element has on the process?

A

5

51
Q

Why must the water level not get too low in a steam drum?

A

The water cools the drum and keeps the drum from getting damaged from the heat.

52
Q

What is a Standard?

A

An accepted norm or requirement.

53
Q

What is a Code?

A

A collection of rules and practical guidelines for the completion of a task.

54
Q

What is a Regulation?

A

A governmental order having the force of law that contains more information than that Act from which it came

55
Q

Which of the following rules have legal force, or could be enforced in a court of law?

A

A pressure relief device for a boiler must be set to open before the pressure in the pressure equipment exceeds the maximum allowable working pressure of the pressure equipment.

56
Q

The Canadian Electrical Code is important to Instrumentation Technologists and Technicians because

A

It defines hazardous locations and the kind of instruments we can put in them.

57
Q

What type of documentation is used to take a complex task and reduce it to smaller tasks?

A

work breakdown structure

58
Q

A _________________ is used to graphically indicate and schedule tasks and identify a crtical path for a project.

A

Gantt chart

59
Q

Which piece of documentation would typically includea BOM?

A

Installation drawing

60
Q

How was the Fieldbus signal line represented:

A

A broken solid line with diamonds between the breaks.

61
Q

the correct description for the following drawing:

A

Loop 301 is a pneumatic control loop, sending out a 3-15 psig signal to a positioner controlled ball valve.

62
Q

Where can you typically find a signature block on a drawing?

A

Near the lower right hand side of a drawing

63
Q

Why do we need a BOM?

A

in order to pick the components that would be required to build a project from an installation diagram.

64
Q

What does a square root symbol inside a box represent?

A

The instrument is a square root extractor

65
Q

What is an orifice plate used for?

A

To create a differential pressure through a flow run

66
Q

What three resource windows are usually shown in Smartplant P&ID?

A

catalog explorer, properties, and engineering editor

INST 257 (7 decks)

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