NOCTI MECHATRONICS EXAM AND STUDY GUIDE
NEWEST 2026 TEST BANK| COMPLETE 350 REAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (MOST RECENT!!)
Q1. Which class of fire involves energized electrical
equipment?
A) Class A
B) Class B
C) Class C
D) Class D
Correct Answer: C
Rationale: Class C fires involve energized electrical equipment.
Use non-conductive extinguishing agents (CO₂, dry chemical).
Water conducts electricity.
Q2. What does a lockout/tagout (LOTO) procedure ensure?
A) Equipment runs faster during maintenance
,B) Equipment is de-energized and cannot be re-energized
accidentally
C) Equipment is cleaned after shutdown
D) Equipment is lubricated before start-up
Correct Answer: B
Rationale: LOTO isolates energy sources and prevents
accidental start-up during maintenance or repair. OSHA 29 CFR
1910.147.
Q3. Which of the following is the unit of electrical resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: C
Rationale: Ohm (Ω) measures resistance. Volt measures
voltage, ampere measures current, watt measures power.
,Q4. A programmable logic controller (PLC) is primarily used
for:
A) Storing large databases
B) Controlling industrial automation processes
C) Powering electric motors
D) Displaying graphics
Correct Answer: B
Rationale: PLCs are industrial computers designed to control
machinery, processes, and automation systems using ladder
logic or other programming languages.
Q5. What is the function of a sensor in a mechatronic system?
A) To actuate a mechanical movement
B) To detect physical quantities and convert them to electrical
signals
C) To amplify power
D) To store energy
Correct Answer: B
Rationale: Sensors detect physical parameters (temperature,
, pressure, position, light) and convert them into measurable
M. M. M. M. M. M. M.
electrical signals.
M. M.
Q6. In a pneumatic system, a 5/2 directional control valve has
M. M. M. M. M. M. M. M. M. M.
how many ports and positions?
M. M. M. M. M.
A) 5 ports, 2 positions
M. M. M.
B) 2 ports, 5 positions
M. M. M.
C) 5 ports, 5 positions
M. M. M.
D) 2 ports, 2 positions
M. M. M.
Correct Answer: A M. M.
Rationale: 5/2 valve = 5 ports (pressure, two cylinder ports, two
M. M. M. M. M. M. M. M. M. M.
exhaust) and 2 positions (actuated and unactuated states).
M. M. M. M. M. M. M. M.
Q7. Which law states that the current through a conductor is
M. M. M. M. M. M. M. M. M. M.
directly proportional to the voltage and inversely proportional
M. M. M. M. M. M. M. M.
to the resistance?
M. M. M.
A) Kirchhoff's Voltage Law M. M.
B) Ohm's Law M.
NEWEST 2026 TEST BANK| COMPLETE 350 REAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (MOST RECENT!!)
Q1. Which class of fire involves energized electrical
equipment?
A) Class A
B) Class B
C) Class C
D) Class D
Correct Answer: C
Rationale: Class C fires involve energized electrical equipment.
Use non-conductive extinguishing agents (CO₂, dry chemical).
Water conducts electricity.
Q2. What does a lockout/tagout (LOTO) procedure ensure?
A) Equipment runs faster during maintenance
,B) Equipment is de-energized and cannot be re-energized
accidentally
C) Equipment is cleaned after shutdown
D) Equipment is lubricated before start-up
Correct Answer: B
Rationale: LOTO isolates energy sources and prevents
accidental start-up during maintenance or repair. OSHA 29 CFR
1910.147.
Q3. Which of the following is the unit of electrical resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: C
Rationale: Ohm (Ω) measures resistance. Volt measures
voltage, ampere measures current, watt measures power.
,Q4. A programmable logic controller (PLC) is primarily used
for:
A) Storing large databases
B) Controlling industrial automation processes
C) Powering electric motors
D) Displaying graphics
Correct Answer: B
Rationale: PLCs are industrial computers designed to control
machinery, processes, and automation systems using ladder
logic or other programming languages.
Q5. What is the function of a sensor in a mechatronic system?
A) To actuate a mechanical movement
B) To detect physical quantities and convert them to electrical
signals
C) To amplify power
D) To store energy
Correct Answer: B
Rationale: Sensors detect physical parameters (temperature,
, pressure, position, light) and convert them into measurable
M. M. M. M. M. M. M.
electrical signals.
M. M.
Q6. In a pneumatic system, a 5/2 directional control valve has
M. M. M. M. M. M. M. M. M. M.
how many ports and positions?
M. M. M. M. M.
A) 5 ports, 2 positions
M. M. M.
B) 2 ports, 5 positions
M. M. M.
C) 5 ports, 5 positions
M. M. M.
D) 2 ports, 2 positions
M. M. M.
Correct Answer: A M. M.
Rationale: 5/2 valve = 5 ports (pressure, two cylinder ports, two
M. M. M. M. M. M. M. M. M. M.
exhaust) and 2 positions (actuated and unactuated states).
M. M. M. M. M. M. M. M.
Q7. Which law states that the current through a conductor is
M. M. M. M. M. M. M. M. M. M.
directly proportional to the voltage and inversely proportional
M. M. M. M. M. M. M. M.
to the resistance?
M. M. M.
A) Kirchhoff's Voltage Law M. M.
B) Ohm's Law M.
