WorksheetsELEN 30173 Final Exam
Total questions: 100
Worksheet time: 50mins
Name
Class
Date
1.
What is the formula for pressure?
a)
P = F + A
b)
P = F × A
c)
P = F/A
d)
P = FA
2.
Which pressure term includes atmospheric pressure?
a)
Gauge pressure
b)
Hydrostatic pressure
c)
Static pressure
d)
Absolute pressure
3.
A gas at 4 psia and 3 ft³ is compressed to 8 psia (constant temperature). What is the new volume?
a)
1.5 ft³
b)
0.75 ft³
c)
3 ft³
d)
6 ft³
4.
Which instrument measures ultra-high vacuum (10⁻⁹ torr)?
a)
Manometer
b)
McLeod gauge
c)
Bourdon tube
d)
Pitot tube
5.
A U-tube manometer uses a liquid with SG = 2.95. If the gas pressure is 3 psig, what is the displacement (in inches)?
a)
28.21 in
b)
10.5 in
c)
35.0 in
d)
83.22 in
6.
What is the sensitivity of a sensor with 10 mV/psi output?
a)
100 mV/psi
b)
0.1 psi/mV
c)
1 psi/mV
d)
10 mV/psi
7.
A pressure transmitter has a span of 0–100 psi. If accuracy is ±0.5% FS, what is the error at 60 psi?
a)
±0.3 psi
b)
±0.05 psi
c)
±0.6 psi
d)
±0.5 psi
8.
What is the relationship between absolute, gauge, and atmospheric pressure?
a)
Patm = Pabs − Pgauge
b)
Pabs = Pgauge − Patm
c)
Pgauge = Pabs + Patm
d)
Pabs = Pgauge + Patm
9.
Which device uses a bourdon tube?
a)
Thermocouple
b)
RTD
c)
Pressure gauge
d)
Displacer
10.
A gas sample at 4 psia and 3 ft³ increases to 8 psia (constant temperature). What is the new volume?
a)
0.75 ft³
b)
6 ft³
c)
1.5 ft³
d)
3 ft³
11.
What is the purpose of a condensate pot in level measurement?
a)
Maintain wet leg liquid
b)
Calibrate RTDs
c)
Measure density
d)
Reduce vapor pressure
12.
Which pressure measurement device is best for high-pressure applications (1000+ atm)?
a)
Pitot tube
b)
Bourdon tube
c)
Manometer
d)
Electrical resistance gauge
13.
A pressure instrument reads 30 psig. What is the absolute pressure if atmospheric pressure is 14.6 psia?
a)
44.6 psia
b)
30 psia
c)
15.4 psia
d)
14.6 psia
14.
Which term refers to pressure caused by a stationary fluid?
a)
Total pressure
b)
Static pressure
c)
Dynamic pressure
d)
Stagnation pressure
15.
What is the unit of pressure in the SI system?
a)
PSI
b)
Pascal (Pa)
c)
Bar
d)
Torr
16.
Which device uses Bernoulli’s theorem for flow measurement?
a)
Pitot tube
b)
Orifice plate
c)
Venturi tube
d)
Turbine
17.
What is the Reynolds number formula?
a)
Re = μvD
b)
Re = μρD
c)
Re = μρvD
d)
Re = vDρ/μ
18.
Which flow meter has the highest mass flow accuracy?
a)
Coriolis meter
b)
Orifice plate
c)
Pitot tube
d)
Turbine meter
19.
What is the primary disadvantage of orifice plates?
a)
Non-linear output
b)
Fragility
c)
High pressure loss
d)
Low accuracy
20.
Which flow meter is best for slurries?
a)
Pitot tube
b)
Orifice plate
c)
Turbine
d)
Venturi tube
21.
A Venturi tube has A₁ = 0.5 m², A₂ = 0.2 m², and ΔP = 10 kPa. Calculate flow rate (ρ = 1000 kg/m³).
a)
2.50 m³/s
b)
0.89 m³/s
c)
3.14 m³/s
d)
1.26 m³/s
22.
Which device measures flow via vortex shedding?
a)
Ultrasonic
b)
Vortex meter
c)
Coriolis
d)
Orifice plate
23.
What is the purpose of an Annubar?
a)
Detect vortices
b)
Calibrate pressure
c)
Average velocity measurement
d)
Measure density
24.
Which flow meter uses Faraday’s law?
a)
Turbine
b)
Magnetic meter
c)
Coriolis
d)
Vortex
25.
Which flow meter requires straight pipe upstream?
a)
Turbine
b)
Coriolis
c)
Venturi tube
d)
Orifice plate
26.
What is the equation of continuity?
a)
Q = A₂/A₁
b)
Q = A₁v₁ = A₂v₂
c)
Q = A₁ + A₂
d)
Q = v₁ + v₂
27.
Which flow meter uses a rotating turbine?
a)
Ultrasonic
b)
Vortex meter
c)
Turbine meter
d)
Coriolis
28.
Which device uses transit-time measurement?
a)
Coriolis
b)
Ultrasonic flow meter
c)
Vortex meter
d)
Turbine
29.
What is the primary advantage of a Venturi tube?
a)
Easy installation
b)
Low pressure loss
c)
Low cost
d)
High accuracy
30.
Which flow meter is unaffected by fluid conductivity?
a)
Coriolis meter
b)
Turbine
c)
Magnetic meter
d)
Ultrasonic
31.
What principle do displacer level instruments use?
a)
Capacitance
b)
Archimedes’ buoyancy
c)
Hydrostatic pressure
d)
Ultrasonic echo
32.
Which level measurement uses gamma radiation?
a)
Radar
b)
Capacitance
c)
Nuclear gauge
d)
Ultrasonic
33.
In a closed tank with a wet leg, what compensates for vapor pressure?
a)
Radar
b)
Bubbler
c)
Dry leg
d)
Condensate pot
34.
Which level gauge uses colored flags?
a)
Sight glass
b)
Bubbler
c)
Displacer
d)
Magnetic sight gauge
35.
What is the purpose of a dry leg in closed tanks?
a)
Calibrate DP cell
b)
Avoid liquid in reference leg
c)
Compensate density
d)
Measure vapor pressure
36.
Which device measures interface level?
a)
Displacer
b)
Ultrasonic
c)
Hydrostatic DP cell
d)
Radar
37.
What is the purpose of a bubbler system?
a)
Calibrate DP cells
b)
Detect interface levels
c)
Measure density
d)
Isolate corrosive liquids
38.
Which level measurement uses purge gas?
a)
Nuclear
b)
Radar
c)
Bubbler
d)
Displacer
39.
Which level measurement is contactless?
a)
Sight glass
b)
Radar
c)
Bubbler
d)
Displacer
40.
What is the formula for hydrostatic pressure?
a)
P = ρAh
b)
P = ρ + h
c)
P = ρgh
d)
P = AF
41.
A tank with SG = 0.95 exerts 0.3 bar pressure on a DP cell. What is the liquid height?
a)
2.91 m
b)
1.5 m
c)
3.07 m
d)
4.12 m
42.
Which device uses a torque tube?
a)
Ultrasonic
b)
Radar
c)
Capacitance
d)
Displacer
43.
What is the purpose of dry calibration for displacers?
a)
Compensate temperature
b)
Test electronics
c)
Measure density
d)
Simulate buoyancy force
44.
Which level measurement uses ultrasonic waves?
a)
Capacitance
b)
Nuclear
c)
Radar
d)
Ultrasonic
45.
Which device uses a float?
a)
Float-type instrument
b)
Ultrasonic
c)
Nuclear
d)
Radar
46.
Which protocol is used for IEC 61850 Sampled Values?
a)
SMV
b)
DNP3
c)
GOOSE
d)
MMS
47.
What is the primary use of a PLC?
a)
Regulatory control
b)
Discrete control
c)
Data acquisition
d)
Redundancy
48.
Which IEC standard defines communication for substation automation?
a)
IEC 61131
b)
IEC 60870
c)
IEC 61499
d)
IEC 61850
49.
Which SAS component connects substations to SCADA?
a)
CCU
b)
HMI
c)
RTU
d)
Gateway
50.
What is the purpose of redundancy in DCS?
a)
Increase availability
b)
Improve accuracy
c)
Reduce cost
d)
Simplify wiring
51.
Which protocol uses GOOSE messaging?
a)
DNP3
b)
Modbus
c)
Profibus
d)
IEC 61850
52.
What is the purpose of an HMI in SAS?
a)
Control IEDs
b)
Display process data
c)
Store configurations
d)
Calibrate sensors
53.
Which DCS component handles I/O modules?
a)
HMI
b)
RTU
c)
Field Control Station
d)
Gateway
54.
Which protocol is used for telemetry in SCADA?
a)
Profibus
b)
GOOSE
c)
MMS
d)
DNP3
55.
What is the output signal range of a DP transmitter?
a)
0–20 mA
b)
0–10 V
c)
4–20 mA
d)
1–5 V
56.
Which protocol uses XML files in SAS?
a)
IEC 61850-6
b)
GOOSE
c)
Modbus
d)
DNP3
57.
What is the purpose of a GUID in IEC 61850?
a)
Data encryption
b)
Calibration
c)
Unique identifier
d)
Signal conditioning
58.
Which device uses a Node Interface Unit (NIU)?
a)
Display alarms
b)
Link to SCADA
c)
Connect RIO bus
d)
Calibrate sensors
59.
Which protocol is used for IEC 60870-5-101?
a)
Ethernet
b)
TCP/IP
c)
Serial telemetry
d)
Profibus
60.
What is the purpose of a Profibus in SAS?
a)
Display data
b)
Connect I/O modules
c)
Link to SCADA
d)
Calibrate sensors
61.
Which material is used in Pt-100 RTDs?
a)
Platinum
b)
Copper
c)
Nickel
d)
Aluminum
62.
A thermistor’s resistance decreases with temperature. What type is it?
a)
Neutral
b)
Linear
c)
PTC
d)
NTC
63.
Which temperature sensor generates a voltage signal?
a)
Thermistor
b)
Thermocouple
c)
RTD
d)
Bimetallic strip
64.
What is the Steinhart-Hart equation used for?
a)
Thermistor calibration
b)
Infrared calibration
c)
Thermocouple cold junction
d)
RTD linearity
65.
What does a 3-wire RTD compensate for?
a)
Signal noise
b)
Temperature drift
c)
Lead resistance
d)
Voltage drop
66.
A Pt-100 RTD has R₀ = 100 Ω. Calculate its resistance at 50°C (α = 0.00385).
a)
85.3 Ω
b)
138.5 Ω
c)
100 Ω
d)
119.25 Ω
67.
Which temperature sensor has the widest measurement range?
a)
RTD
b)
Thermocouple
c)
Infrared
d)
Thermistor
68.
Which device uses a cold junction?
a)
Infrared
b)
RTD
c)
Thermistor
d)
Thermocouple
69.
What is the purpose of a Wheatstone bridge in RTDs?
a)
Measure resistance
b)
Generate voltage
c)
Linearize output
d)
Compensate lead length
70.
A bi-metallic copper strip (k = 16.6×10⁻⁶) is 4 m long at 20°C. How much does it expand at 100°C?
a)
3.2 mm
b)
6.5 mm
c)
10 mm
d)
5.312 mm
71.
Which temperature sensor is passive?
a)
Bimetallic strip
b)
Thermocouple
c)
Infrared
d)
RTD
72.
Which device uses a piezoelectric crystal?
a)
Thermistor
b)
RTD
c)
Bimetallic strip
d)
Ultrasonic flow meter
73.
A thermistor has R = 4000 Ω. Using Steinhart-Hart (A = 1.1252×10⁻³, B = 2.3478×10⁻⁴, C = 8.5262×10⁻⁸), find T in °C.
a)
25°C
b)
100°C
c)
0°C
d)
50°C
74.
Which temperature sensor is least accurate?
a)
Thermocouple
b)
Infrared
c)
Thermistor
d)
RTD
75.
Which device uses exposed junctions for fast response?
a)
Thermistor
b)
Exposed thermocouple
c)
RTD
d)
Infrared
76.
What is the resistance of a Pt-100 RTD at 0°C?
a)
50 Ω
b)
1000 Ω
c)
100 Ω
d)
200 Ω
77.
Which temperature sensor is most linear?
a)
Thermocouple
b)
Bimetallic strip
c)
RTD
d)
Thermistor
78.
What is the purpose of a filled thermal system?
a)
Detect flow
b)
Measure temperature remotely
c)
Compensate lead resistance
d)
Generate voltage
79.
Which temperature scale is absolute?
a)
Kelvin
b)
Celsius
c)
Rankine
d)
Fahrenheit
80.
What is the unit of thermal expansion coefficient?
a)
°C⁻¹
b)
psi⁻¹
c)
°F⁻¹
d)
Ω/°C
81.
Which IEC 61850 protocol enables direct IED communication?
a)
DNP3
b)
GOOSE
c)
MMS
d)
Modbus
82.
Which SAS level processes data from IEDs?
a)
Bay Level
b)
Station Level
c)
Process Level
d)
SCADA Level
83.
What is the purpose of a CCU in SAS?
a)
Collect data from SUs
b)
Store configurations
c)
Connect to SCADA
d)
Display alarms
84.
Which device uses a GUID in IEC 61850?
a)
Calibration
b)
Data encryption
c)
Signal conditioning
d)
Unique identifier
85.
What is the purpose of a MUX in SAS?
a)
Multiplex signals
b)
Generate alarms
c)
Calibrate RTDs
d)
Measure voltage
86.
Which protocol is used for IEC 61850 MMS?
a)
HART
b)
Profibus
c)
TCP/IP
d)
RS-232
87.
What is the primary function of an RTU in SCADA?
a)
Remote data acquisition
b)
Local control
c)
Signal conditioning
d)
Redundancy
88.
Which device is part of the SAS process level?
a)
Circuit breaker
b)
Engineering workstation
c)
Gateway
d)
HMI
89.
What is the purpose of an SCD file in IEC 61850?
a)
Signal calibration
b)
Substation configuration
c)
Protocol conversion
d)
Data encryption
90.
Which protocol is used for IEC 60870-5-104?
a)
Ethernet TCP/IP
b)
RS-485
c)
Profibus
d)
HART
91.
What is the purpose of a GPS module in SAS?
a)
Time synchronization
b)
Voltage regulation
c)
Data storage
d)
Signal amplification
92.
Which device uses a torque tube?
a)
Radar
b)
Capacitance
c)
Displacer
d)
Ultrasonic
93.
What is the purpose of a dry calibration for displacers?
a)
Measure density
b)
Test electronics
c)
Simulate buoyancy force
d)
Compensate temperature
94.
Which protocol uses Sampled Measured Values (SMV)?
a)
IEC 61850
b)
Modbus
c)
DNP3
d)
Profibus
95.
What is the primary use of SCADA?
a)
Supervisory control
b)
Redundancy
c)
Signal conditioning
d)
Data logging
96.
Which device uses a dual-tube design?
a)
Magnetic meter
b)
Venturi tube
c)
Turbine
d)
Coriolis meter
97.
Which component is part of the SAS station level?
a)
Circuit breaker
b)
CT/PT
c)
Relay
d)
HMI
98.
What is the purpose of a gateway in SAS?
a)
Measure voltage
b)
Calibrate sensors
c)
Connect to external networks
d)
Process data
99.
Which protocol uses Generic Object Oriented Substation Events (GOOSE)?
a)
Profibus
b)
Modbus
c)
DNP3
d)
IEC 61850
100.
What is the purpose of a Node Interface Unit (NIU)?
a)
Link to SCADA
b)
Connect RIO bus
c)
Calibrate sensors
d)
Display alarms
100 %
