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Total questions: 52
Worksheet time: 1hrs 16mins
What does a solenoid valve do?
A. Opens and closes switches
B. Serves as an actuator to open and close pneumatic and hydraulic valves
C. Transforms volts to millivolts
D. Actuates to open and close terminal blocks
What is the psi reading on MOST gauge pressure indicators that are at atmospheric pressure?
100
10
0
Below zero
Proportional control is also known as
Derivative control
Reset control
Gain control
On - off control
The document that’s required to loop check & commission are
P & ID , loop diagrams , and instrument specification sheets
P & ID and electrical drawings
Electrical drawings and typical installations detail sheets
Logic diagrams , loop sheets , and instrument operation manuals
In an Instrument loop, where would wet instrument air show up first?
In the air piping
At the dryer
In the filter regulator
At the valve positioner
A list of materials are found in:
General arrangement drawings
Instrument detail drawings
Piping orthographics
P & ID
Signal cable shields should be connected to ground at:
Each accessible point in the signal path
Each end of the signal path
Each junction point in the signal path
1 point in the signal path
When is the BEST time to document each loop check for commissioning?
Prior to the start of inspection
When all test and inspection activities are complete
When updating information on a daily basis
At the time each test is completed
Teflon paste must not be used on:
Nitrogen service
Natural gas service
Water service
Oxygen service
A 24VDC power supply is not working. With your multimeter you verify no DC voltage. On the120VAC input you measure 120V between hot and ground, and 72V between hot and neutral. What isthe most likely cause of this?
Lost the ground
Lost the hot
Lost the neutral
Lost the fuse
Gain increase when tube:
Back bends are made
Bend radius increases
Size decreases
Long radius elbows are used
A temperature measuring device that produces a voltage as the temperature changes is a/an:
RTD
Thermistor
Thermometer
Thermocouple
A pressure piping code is found in:
ANSI B 31.1
NEC 690 .
OSHA1910 .
ISA S 5.1
When marking tubing for cutting, the ideal preferred method is to:
Mark the tube with a crayon
Scribe a mark into the tube with a sharp object .
Mark the tube with a felt tip pen
Mark the tube with a grease pencil
An example of direct measurement indicator is a :
Pressure gauge
Bulb thermometer
Sight glass
Flowmeter
On the image , how many hand valves are installed on Tank 1201C
1
2
3
4
Loop checks, all of the following are performed EXCEPT:
Tuning
Calibrating
Proving
Continuity Checks
75 volt DC potential is applied to a 25 ohm load, the circuit current is:
0.3 amps
3.0 amps
30 amps
300 milliamps
A valve has linear-flow characteristics when the:
Flow corresponds directly to the valve stem position
Differential pressure corresponds directly to the valve stem position
Flow is high enough to retract the valve stem
Flow is high enough to retract the valve stem
What is a circuit current if 45 VDC is applied to a 250 ohm load?
0.18 amp
0.25 amp
0.50 amp
1.8 amp
All of the following valves are used to regulate flow EXCEPT:
Ball
Butterfly
Needle
Gate
The value of the dynamic variable desired in a process is the:
Signal
Set point
Resolution
Specific gravity
When properly calibrated and installed the most accurate primary flow element is the
Venturi tube
Pitot tube
Annubar tube
Magmeter
An acceptable tool for marking 360 degrees around the outside of tubing is a:
Laser level
Rubber band
String
Ferrule
What process variable is defined as the amount of force exerted by a substance over a given unit of measure?
Flow
Pressure
Level
Temperature
The storage of steel wool can be considered a fire hazard when stored around______.
Matches
Flint
Batteries
Gas cans
The MINIMUM value of the measured process range is considered to be:
Upper measured value
Zero input value
Span value
3psi and 4ma
A bubbler system’s purpose is to measure:
Specific gravity
Head pressure
Magnetism
Conductance
To prevent travel damage to a limit switch, use a(n)_____.
Electronic stop
Larger switch
Mechanical stop
Different actuator arm
In a controller, automatic control describes:
The final control element responding to the error signal or change in process
The final control element as manipulated by the operator
The final element as controlled by the setpoint of the controller locally
How the controller receives its setpoint form a remote device
When using soft rolled tubing, it must be unrolled and straightened:
By use of rollers
By using wooden mallets
By hand
Enough to enter a compression fitting
Where would an instrument fitter find the PROPER process to connect an instrument to a process tap?
In a title block
On a flow diagram
In an instrument balloon
On an installation detail
When the leads & selector switch are in the correct position what would be the reason a multimeter readvoltage correctly but unable to read milliamp current?
The leads are reversed
The leads are damaged
The meter's current fuse is blown
The meter's power fuse is blown
When installing packing rings, how much should the cute ends be staggered?
0 Degrees
45 Degrees
90 Degrees
180 Degrees
A good rule of thumb, how much will ½” tubing gain for every 90-degree bend?
3/16 inch
14 inch
3/8 inch
½
When removing an instrument from the receiving warehouse; what does NOT need to be checked?
Inspect the instrument for damage
Inspect the instrument for missing parts
Check for the proper range and calibration
Check the shipping date from the manufacturer
Where are rubber gaskets used?
In high pressure / low pressure systems
In low pressure / low temperature systems
In hot water / steam systems
In low pressure / high temperature systems
What is the purpose of an instrument index?
List the manufacturer of the instrument
Show how to install an instrument
List every instrument used on a project
illustrate the location of an instrument
What are two (2) types of material used for shielding
Plastic and rubber
Foil and braided
Paper and cloth
Solid and stranded
An employee de-energizes a piece of equipment by removing the power plug from the outlet. If theemployee continues to hold on to the power plug once removed, this employee is said to have what type ofcontrol over the energy potential?
Isolation control
Lockout tagout
Exclusive control
Remote control
When an 8mA signal is connected across a 250 ohm resistor, the voltage drop across the resistor would be:
1 v
2 v
3 v
4 v
PTFE tape used as a sealant should be wrapped:
In the same direction as the threads
In the opposite direction of the threads
In either direction
4 inch past the threads
In the instrumentation, what is a common material used to slow down moisture?
Wood shavings
Cotton
Silica clay
Desiccant
The pneumatic output of a 3-15 psi instrument is at 50%. The actual output in pressure is:
9 PSI
6 PSI
15 PSI
3 PSI
The standards of which organization identify the characteristics of metals used for piping?
AWWA
NPS
ASTM
ISA
The output of a thermocouple is expressed in:
Milliamps
Microvolts
Millivolts
Volts
MOST pneumatic receivers operate in the range of:
1-5 psi
0-10 psi
3-15 psi
0-100 psi
Five-point method of calibration checks the device output at
0 % , 50 % , 100 % , 50 % , 0 %
4ma , 8ma , 12ma , and 20ma and back at 4ma
A stimulated signal at 5 representative percentages .
Zero and 100 % five times
What does the term “fail open” mean in relation to valve actuators?
Normal position of the actuator is open
When the actuator power is lost , the valve will open
When the actuator power is lost , the valve will fail as is
Normal position of the actuator is closed
An instrument fitter needs to withdraw 2 sticks of ½” Hastelloy “B” tubing from stores. It is notlabeled and is mixed in with ½” 316 SS tubing that is also not labeled. What should they do?
Have procurement order some more from the supplier
Report the problem to the supervisor and have the tubing PMI'd
Compare wall thicknesses and use the one with the most wall thickness
Perform a hardness test on the tubing
What (2) factors determine the static head pressure close to the bottom of a tank?
The acidity or alkalinity of the liquid
The height of the level and the turbidity
The height of the level and the specific gravity
The specific gravity and the viscosity
A transmitter with an RTD is not working. Using the multimeter, which two (2) parameters will help the best with troubleshooting?
AC Voltage and millivolts
DC Voltage and millivolts
AC voltage and resistance
DC voltage and resistance
