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CWEA Electrical/Instrumentation Technologist
Grade 1 Exam QUESTIONS AND DETAILED
SOLUTIONS JUST RELEASED
CWEA Electrical/Instrumentation Technologist Grade 1 Exam
Point-Form Summary of Exam Coverage
EXAM CONTENT DOMAINS (Based on CWEA Blueprint)
Domain Weight Key Topics
Electrical Theory and 15- Ohm's Law, series/parallel circuits, AC/DC theory, power calculation
Fundamentals 20% transformers
10- Multimeters, clamp meters, meggers, calibration procedures, loop
Test Equipment and Calibration
15% calibration
15- LOTO, confined space, arc flash, PPE selection, hot work permits, haz
Safety Procedures and PPE
20% communication
Preventive and Corrective 10-
PM scheduling, equipment inspection, lubrication, failure analysis
Maintenance 15%
Hydraulics and Pneumatics 5-10% Basic principles, pressure measurement, actuators, valves
10-
Motors and Control Circuits Motor types, starters, overload protection, VFDs, schematics
15%
Instrumentation and Process 10-
Sensors, transmitters, 4-20 mA loops, PID control, PLC basics
Control 15%
Tools and Shop Equipment 5-10% Hand tools, power tools, soldering, torque wrenches, precision tools
Mathematics for Technologists 5-10% Basic electrical calculations, unit conversions, power formulas
Blueprint Reading and Schematics 5-10% Electrical symbols, one-line diagrams, ladder diagrams, P&IDs
Section 1: Electrical Theory and Fundamentals (Questions 1-50)
1. Which of the following is the primary function of a current transformer (CT) in electrical systems?
A) To increase voltage
B) To measure high currents safely
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C) To store electrical energy
D) To protect against overvoltage
Answer: B
Rationale: A current transformer reduces high currents to a lower, measurable value, allowing safe
measurement and monitoring by instruments and protective devices. CTs are essential for metering
high-amperage circuits .
2. What is the total resistance of two 100-ohm resistors connected in parallel?
A) 200 ohms
B) 100 ohms
C) 50 ohms
D) 25 ohms
Answer: C
Rationale: For two equal resistors in parallel, total resistance R<sub>T</sub> = R ÷ 2 = 100 ÷ 2 = 50
ohms. For unequal resistors: 1/R<sub>T</sub> = 1/R₁ + 1/R₂ .
3. In a three-phase system, what is the voltage between any two line conductors called?
A) Phase voltage
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B) Line voltage
C) Neutral voltage
D) Ground voltage
Answer: B
Rationale: Line voltage is measured between any two line conductors in a three-phase system. Phase
voltage is measured from line to neutral .
4. What is the turns ratio of a transformer with a primary voltage of 480V and a secondary voltage of
120V?
A) 2:1
B) 3:1
C) 4:1
D) 5:1
Answer: C
Rationale: Turns ratio = primary voltage ÷ secondary voltage = 480 ÷ 120 = 4:1. This also equals the ratio
of primary turns to secondary turns .
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5. Which of the following is NOT a required element to start a fire?
A) Heat
B) Oxygen
C) Nitrogen
D) Fuel
Answer: C
Rationale: The three elements needed to start a fire are heat, oxygen, and fuel (the "fire triangle").
Removing any one element extinguishes the fire .
6. If 17.32 volts are applied across a resistance of 50 ohms, how much power is expended in the
resistor?
A) 3.0 watts
B) 6.0 watts
C) 12.0 watts
D) 24.0 watts
Answer: B
CWEA Electrical/Instrumentation Technologist
Grade 1 Exam QUESTIONS AND DETAILED
SOLUTIONS JUST RELEASED
CWEA Electrical/Instrumentation Technologist Grade 1 Exam
Point-Form Summary of Exam Coverage
EXAM CONTENT DOMAINS (Based on CWEA Blueprint)
Domain Weight Key Topics
Electrical Theory and 15- Ohm's Law, series/parallel circuits, AC/DC theory, power calculation
Fundamentals 20% transformers
10- Multimeters, clamp meters, meggers, calibration procedures, loop
Test Equipment and Calibration
15% calibration
15- LOTO, confined space, arc flash, PPE selection, hot work permits, haz
Safety Procedures and PPE
20% communication
Preventive and Corrective 10-
PM scheduling, equipment inspection, lubrication, failure analysis
Maintenance 15%
Hydraulics and Pneumatics 5-10% Basic principles, pressure measurement, actuators, valves
10-
Motors and Control Circuits Motor types, starters, overload protection, VFDs, schematics
15%
Instrumentation and Process 10-
Sensors, transmitters, 4-20 mA loops, PID control, PLC basics
Control 15%
Tools and Shop Equipment 5-10% Hand tools, power tools, soldering, torque wrenches, precision tools
Mathematics for Technologists 5-10% Basic electrical calculations, unit conversions, power formulas
Blueprint Reading and Schematics 5-10% Electrical symbols, one-line diagrams, ladder diagrams, P&IDs
Section 1: Electrical Theory and Fundamentals (Questions 1-50)
1. Which of the following is the primary function of a current transformer (CT) in electrical systems?
A) To increase voltage
B) To measure high currents safely
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C) To store electrical energy
D) To protect against overvoltage
Answer: B
Rationale: A current transformer reduces high currents to a lower, measurable value, allowing safe
measurement and monitoring by instruments and protective devices. CTs are essential for metering
high-amperage circuits .
2. What is the total resistance of two 100-ohm resistors connected in parallel?
A) 200 ohms
B) 100 ohms
C) 50 ohms
D) 25 ohms
Answer: C
Rationale: For two equal resistors in parallel, total resistance R<sub>T</sub> = R ÷ 2 = 100 ÷ 2 = 50
ohms. For unequal resistors: 1/R<sub>T</sub> = 1/R₁ + 1/R₂ .
3. In a three-phase system, what is the voltage between any two line conductors called?
A) Phase voltage
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B) Line voltage
C) Neutral voltage
D) Ground voltage
Answer: B
Rationale: Line voltage is measured between any two line conductors in a three-phase system. Phase
voltage is measured from line to neutral .
4. What is the turns ratio of a transformer with a primary voltage of 480V and a secondary voltage of
120V?
A) 2:1
B) 3:1
C) 4:1
D) 5:1
Answer: C
Rationale: Turns ratio = primary voltage ÷ secondary voltage = 480 ÷ 120 = 4:1. This also equals the ratio
of primary turns to secondary turns .
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5. Which of the following is NOT a required element to start a fire?
A) Heat
B) Oxygen
C) Nitrogen
D) Fuel
Answer: C
Rationale: The three elements needed to start a fire are heat, oxygen, and fuel (the "fire triangle").
Removing any one element extinguishes the fire .
6. If 17.32 volts are applied across a resistance of 50 ohms, how much power is expended in the
resistor?
A) 3.0 watts
B) 6.0 watts
C) 12.0 watts
D) 24.0 watts
Answer: B
