Instrumentation 2 Test

Question 1

What makes temperature measurements unique when compared to other process variables?

Answer 1

It is not measured directly

It is inferred by monitoring temperatures affects on other things

Question 2

What is exothermic?

Answer 2

The emission of heat

Question 3

What is endothermic

Answer 3

Absorption of heat

Question 4

What is he transfer?

Answer 4

Process of thermal energy flowing from a body of high energy to a body of low energy

Question 5

Four types of temperature measurements

Answer 5

Fahrenheit
Celsius
Kelvin
Ranking

Question 6

There’s a thermowell?

Answer 6

Protects temperature sensors from harsh environments

Question 7

Four main types of temperature sensors?

Answer 7

RTD
Thermocouples
Thermistor
Integrated circuit

Question 8

Fahrenheit to Celsius

Answer 8

(F-32) / 1.8 = C

Question 9

Celsius to Fahrenheit

Answer 9

C x 1.8+32=F

Question 10

Celsius to Kelvin

Answer 10

C+273.15=kelvin

Question 11

Rankine to Fahrenheit

Answer 11

R-459.67= F

Question 12

What are two thermal couple types

Answer 12

Copper Constantin

Iron constantin

Question 13

What is a thermopile

Answer 13

Set of thermocouples arranged for measuring small quantities of radiant heat usually wired in series

Question 14

What is a dry well calibrator

Answer 14

Used for accurate liquid free calibrations of temperature devices
(RTD’S
Thermistors
Thermocouples)

Question 15

Most common type of RTD

Answer 15

100-ohm, platinum

Question 16

What device is the basis of most pneumatic instruments

Answer 16

Nozzle flapper system

Question 17

Most common type of gas utilized for pneumatic signaling

Answer 17

Dry instrument air

Question 18

Most Common pneumatic Signal

Answer 18

3-15 psi

Question 19

How to find accuracy

Answer 19

(Deviation/span)x 100

Question 20

How should process tubing be installed

Answer 20

As short as possible

Question 21

Relationship between Flow through a valve and the area of the opening

Answer 21

Proportional to the square root of the differential pressure across the valve times the area of the opening

Question 22

Difference between when your valve and nonlinear valve

Answer 22

When your valve when open 50% there is 50% of the max flow rate 25% open means 25% of the max flow rate the relationship is not true for a nonlinear valve

Question 23

What is a I/P transducer

Answer 23

Convert a current to pressure

Question 24

Fail open

Answer 24

Applied air acts against the spring in the actuator to cause the valve to close upon loss of air the spring will force the valve to open also referred to as direct action

Question 25

Fail closed

Answer 25

Opposite of feel open also known as reverse action

Question 26

Two most common analog signals used in the industry

Answer 26

1-5 VDC 4-20 mA both utilize live zero

Question 27

Single loop controller

Answer 27

Program stored into permanent memory cannot be changed or adapted to fit a working process other than what it was designed for

Question 28

Protocol

Answer 28

Describes how data is to be exchanged

Question 29

Alpha numeric

Answer 29

Character set the controls both letters and digits

Question 30

Controlled system

Answer 30

Part of the system under control also known as the process

Question 31

How do you controllers execute the program logic

Answer 31

Sequentially

Question 32

What should be done before configuring a smart transmitter

Answer 32

What is the control loop in manual mode

Question 33

What's the what's the security switch be in

Answer 33

Off state

Question 34

Which process variable measurement may require the technician to configure transmitter for a square root output rather than a linear outlet

Answer 34

Flow-due to the relationship between flow velocity and the square root of the differential pressure measured across the restriction

Question 35

Digital to analog trim is performed on the smart device

Answer 35

Set the output of the device so thatwhen it tries to help with the necessary current it really is the current

Question 36

Damping procedure is completed

Answer 36

Adjusts how often the instrument updates the output in response to the sensor

Question 37

Sensor zero trim is performed

Answer 37

One point calibration that the Stabley S-t is the starting point for the sensing element

Question 38

Relationship between installation and accuracy

Answer 38

Transmitter is mounted in a position that changes the actual process pressure that is measuring the overall goal of maintaining efficient and accurate an automatic process cannot be achieved

Question 39

Recommended spacing for in front of an instrument in order to maintenance and calibrate

Answer 39

6 inches

Question 40

Vent valves should be oriented with a liquid and what direction

Answer 40

Taps should be located on bottom of process line

Question 41

Vent valves for a gas should be located where

Answer 41

Tabs are at the top of device

Question 42

Discrete signal

Answer 42

Input signal receive from controller movie either on or off

Question 43

Gas measurement

Answer 43

Process to Tubing should be able to routed down word from the transmitter to the process

Question 44

Process to Bing for a liquid

Answer 44

Upward

Question 45

Process tubing for gas

Answer 45

Downward

Question 46

Impulse to being is connected to steam

Answer 46

Tubing will be filled with water to isolate the instrument from the heat of the steam

Question 47

Gas tubing cannot be routed without valleys we're moisture may accumulate

Answer 47

Drains must be mounted to allow moisture to be removed

Question 48

Routing electrical conduit to a transmitter

Answer 48

Care must be taken so that the signal is not induced by stress voltage or electrical noise