BCTC Industrial Maintenance Technology
AMTEC (NOCTI Mechatronic) Review|
questions| with complete solutions
Course
NOCTI
1. What is the primary function of a Programmable Logic Controller (PLC) in a
mechatronic system?
A. Power distribution
B. Motion sensing
C. Control of automated machinery
D. Data encryption
Correct Answer: C
Solution: A PLC is used to automate machinery by processing input signals, running
programmed logic, and controlling outputs such as motors and actuators.
2. An electric motor draws 15 amps of current at 240 volts. What is the power
consumed in watts?
A. 2250 W
B. 3600 W
C. 1800 W
D. 4500 W
Correct Answer: B
Solution: Power = Voltage × Current = 240 V × 15 A = 3600 W
3. In a pneumatic system, what device converts compressed air energy into
mechanical motion?
A. Solenoid
B. Cylinder (actuator)
C. Compressor
D. Filter
Correct Answer: B
Solution: Pneumatic cylinders convert the energy of compressed air into mechanical movement,
such as pushing or pulling.
,4. What is the standard method to safely discharge a capacitor before servicing a
circuit?
A. Short it with a screwdriver
B. Use a properly rated resistor
C. Ground it directly with bare wire
D. Blow compressed air across terminals
Correct Answer: B
Solution: Using a resistor safely reduces the charge gradually, preventing electrical arcing and
equipment damage.
5. Which type of sensor provides continuous position feedback?
A. Limit switch
B. Proximity sensor
C. Potentiometer
D. Photoelectric sensor
Correct Answer: C
Solution: A potentiometer varies resistance based on position, giving analog feedback for
precise positioning.
6. What is the function of a Variable Frequency Drive (VFD)?
A. Change the voltage of AC motors
B. Convert AC to DC power
C. Control motor speed by varying frequency
D. Store energy like a capacitor
Correct Answer: C
Solution: A VFD controls the speed of an AC motor by adjusting the frequency and voltage of
the electrical power supplied to it.
7. What does Ohm's Law state?
A. Voltage = Current × Resistance
B. Voltage = Resistance / Current
,C. Current = Voltage × Resistance
D. Power = Current / Voltage
Correct Answer: A
Solution: Ohm’s Law is V = I × R, where voltage equals current multiplied by resistance.
8. A ball bearing is showing signs of overheating. What is the most likely cause?
A. Lack of lubrication
B. Low shaft speed
C. Excessive air flow
D. Weak foundation
Correct Answer: A
Solution: Insufficient lubrication increases friction, which leads to overheating in bearings.
9. What is the most common method used to align two coupled shafts?
A. Visual alignment
B. Ruler and caliper method
C. Dial indicator method
D. String line method
Correct Answer: C
Solution: Dial indicators offer precision alignment by detecting runout and angular
misalignment between shafts.
10. Which of the following is not a valid safety procedure when working with
energized systems?
A. Use insulated tools
B. Wear lockout/tagout tags
C. Remove safety guards
D. Verify zero energy state before working
Correct Answer: C
Solution: Removing guards increases risk and violates safety standards; proper procedures
always include keeping guards in place when possible.
, 11. What does the acronym "NEMA" stand for, and what is its primary purpose in
industrial equipment?
A. National Electrical Manufacturing Association, setting standards for electrical equipment
B. National Engineering Mechanics Association, providing safety protocols
C. National Electrical Maintenance Act, governing repair guidelines
D. New Engineering Manufacturing Agreement, specifying product designs
Correct Answer: A
Solution: NEMA stands for the National Electrical Manufacturers Association, and it sets
standards for electrical equipment, ensuring compatibility and safety across devices.
12. When servicing a motor, which of the following should be checked first?
A. Bearings
B. Voltage and current readings
C. Motor windings
D. Airflow
Correct Answer: B
Solution: Voltage and current readings should be checked first to ensure the motor is receiving
the correct electrical supply and is operating properly.
13. In a hydraulic system, what does the term "hydraulic fluid" primarily do?
A. Cools the system
B. Acts as a lubricant
C. Transmits power
D. Filters impurities
Correct Answer: C
Solution: Hydraulic fluid transmits power within the system, enabling the movement of
actuators and other components through pressure changes.
14. Which of the following is an example of a mechanical lockout device?
A. Circuit breaker
B. Lockout tag
C. Padlock
D. Electrical fuse
AMTEC (NOCTI Mechatronic) Review|
questions| with complete solutions
Course
NOCTI
1. What is the primary function of a Programmable Logic Controller (PLC) in a
mechatronic system?
A. Power distribution
B. Motion sensing
C. Control of automated machinery
D. Data encryption
Correct Answer: C
Solution: A PLC is used to automate machinery by processing input signals, running
programmed logic, and controlling outputs such as motors and actuators.
2. An electric motor draws 15 amps of current at 240 volts. What is the power
consumed in watts?
A. 2250 W
B. 3600 W
C. 1800 W
D. 4500 W
Correct Answer: B
Solution: Power = Voltage × Current = 240 V × 15 A = 3600 W
3. In a pneumatic system, what device converts compressed air energy into
mechanical motion?
A. Solenoid
B. Cylinder (actuator)
C. Compressor
D. Filter
Correct Answer: B
Solution: Pneumatic cylinders convert the energy of compressed air into mechanical movement,
such as pushing or pulling.
,4. What is the standard method to safely discharge a capacitor before servicing a
circuit?
A. Short it with a screwdriver
B. Use a properly rated resistor
C. Ground it directly with bare wire
D. Blow compressed air across terminals
Correct Answer: B
Solution: Using a resistor safely reduces the charge gradually, preventing electrical arcing and
equipment damage.
5. Which type of sensor provides continuous position feedback?
A. Limit switch
B. Proximity sensor
C. Potentiometer
D. Photoelectric sensor
Correct Answer: C
Solution: A potentiometer varies resistance based on position, giving analog feedback for
precise positioning.
6. What is the function of a Variable Frequency Drive (VFD)?
A. Change the voltage of AC motors
B. Convert AC to DC power
C. Control motor speed by varying frequency
D. Store energy like a capacitor
Correct Answer: C
Solution: A VFD controls the speed of an AC motor by adjusting the frequency and voltage of
the electrical power supplied to it.
7. What does Ohm's Law state?
A. Voltage = Current × Resistance
B. Voltage = Resistance / Current
,C. Current = Voltage × Resistance
D. Power = Current / Voltage
Correct Answer: A
Solution: Ohm’s Law is V = I × R, where voltage equals current multiplied by resistance.
8. A ball bearing is showing signs of overheating. What is the most likely cause?
A. Lack of lubrication
B. Low shaft speed
C. Excessive air flow
D. Weak foundation
Correct Answer: A
Solution: Insufficient lubrication increases friction, which leads to overheating in bearings.
9. What is the most common method used to align two coupled shafts?
A. Visual alignment
B. Ruler and caliper method
C. Dial indicator method
D. String line method
Correct Answer: C
Solution: Dial indicators offer precision alignment by detecting runout and angular
misalignment between shafts.
10. Which of the following is not a valid safety procedure when working with
energized systems?
A. Use insulated tools
B. Wear lockout/tagout tags
C. Remove safety guards
D. Verify zero energy state before working
Correct Answer: C
Solution: Removing guards increases risk and violates safety standards; proper procedures
always include keeping guards in place when possible.
, 11. What does the acronym "NEMA" stand for, and what is its primary purpose in
industrial equipment?
A. National Electrical Manufacturing Association, setting standards for electrical equipment
B. National Engineering Mechanics Association, providing safety protocols
C. National Electrical Maintenance Act, governing repair guidelines
D. New Engineering Manufacturing Agreement, specifying product designs
Correct Answer: A
Solution: NEMA stands for the National Electrical Manufacturers Association, and it sets
standards for electrical equipment, ensuring compatibility and safety across devices.
12. When servicing a motor, which of the following should be checked first?
A. Bearings
B. Voltage and current readings
C. Motor windings
D. Airflow
Correct Answer: B
Solution: Voltage and current readings should be checked first to ensure the motor is receiving
the correct electrical supply and is operating properly.
13. In a hydraulic system, what does the term "hydraulic fluid" primarily do?
A. Cools the system
B. Acts as a lubricant
C. Transmits power
D. Filters impurities
Correct Answer: C
Solution: Hydraulic fluid transmits power within the system, enabling the movement of
actuators and other components through pressure changes.
14. Which of the following is an example of a mechanical lockout device?
A. Circuit breaker
B. Lockout tag
C. Padlock
D. Electrical fuse
