Mechatronics Certification Tests

Mechatronics Certification Test - Motor and Motor Controls

This certificate exam evaluates the candidate's mastery of the principles, application, troubleshooting and maintenance of rotating electrical motors and electronic motor drives as used in packaging, processing and other manufacturing environments.  Topics include motor and drive safety practices;  characteristics of 3-phase power systems; speed, torque and efficiency characteristics of various types of single and three phase AC motors and various types of DC motors;  AC and DC motor nameplate specifications; means of  starting and braking motors;  DC electronic drives and AC variable frequency and pulse width modulated electronic drives.  This exam does not include stepping and servo motors and their controls which would be used in robotic and motion control systems.

 AC and DC electric motors are very commonly applied in virtually all industrial operations including packaging equipment, machine tools, and processing equipment; and control of speed, torque and other parameters is growing in use, resulting in more complex motor drive systems.

This certificate is aimed at intermediate-level trades, technicians and technologists who will assemble, install, startup, troubleshoot, modify or repair machines or processes utilizing electric motors that require more than simple across-the-line starting. It is expected that those sitting for this exam will have passed Industrial Electricity 1 and Industrial Electricity 2 or have equivalent knowledge and experience. 

Price:
$125.00
Test Topics & Questions
  • List and describe the rules of safe dress around electric motors
  • List and describe the basic rules of electric motor operation safety
  • Identify the appropriate Personal Protective Equipment (PPE) up to Category 2 for NFPA 70E
  • Describe the procedure for basic lockout and tagout (control of hazardous energy)
  • Describe factors to consider when selecting test equipment for troubleshooting AC/DC motor drives
  • Describe factors to consider when selecting test equipment for troubleshooting AC/DC motors
  • Explain why it is necessary to verify that the capacitors are discharged in an AC drive
  • List and describe two methods or applications used to measure motor speed
  • Define mechanical torque and explain how it is calculated
  • Describe how to measure the approximate torque of a mechanical load
  • Describe the relationship between motor torque, speed and power
  • Define and calculate horsepower in English and S.I. units
  • Describe the impact of gear and belt drives on torque and horsepower
  • Determine the torque delivered by a motor using current measurements
  • Define motor efficiency and explain its importance
  • Describe the speed/torque characteristics of three types of DC motor configurations
  • Describe the speed/torque characteristics of AC motor configurations
  • Calculate the efficiency of a motor given input and output power
  • Demonstrate the ability to read and interpret a motor or drive nameplate
  • Demonstrate the ability to interpret a connection diagram
  • Select the correct DC motor for an application based on motor performance characteristics
  • Select the correct AC motor for an application based on motor performance characteristics
  • Identify the major components of a DC motor and describe their functions
  • Describe the operation of a DC motor
  • List three wiring configurations for a DC motor
  • Describe how to troubleshoot a DC motor fault
  • Define counter electromotive force (CEMF) and explain its effect
  • Describe the operation, function, wiring and schematic symbols for DC series motors
  • Describe the operation, function, wiring and schematic symbols for DC shunt/compound motors
  • Describe the operation, function, wiring and schematic symbols for DC permanent magnet motors
  • Connect, operate, and reverse DC motors
  • Describe two factors that affect the strength of a magnetic field
  • Describe the maintenance procedures for the inspection and replacement of brushes
  • Describe the function of a DC drive 
  • Describe how to connect and operate a DC drive
  • Describe the function and operation of an SCR
  • Describe the operation of SCR half-wave speed control
  • Describe the operation of armature control
  • Describe the function of field control for a DC motor
  • Describe the function and setting of IR compensation in a DC drive
  • Explain the importance of proper setup of a DC drive (such as speed, torque, IR compensation, acceleration / deceleration)
  • Describe the function and connections of a DC pulse width modulation drive and give an application
  • Describe common tests and instruments used to troubleshoot DC drives
  • List and describe the common failures of a DC drive
  • Describe the component/operation and schematic symbols for split-phase, capacitor-start, capacitor-run, and shaded pole AC motors
  • Describe how to troubleshoot motor capacitor failure
  • Describe the purpose of a bleeder resistor
  • Describe how to reverse the rotation of a capacitor-start motor
  • Describe how to reverse the rotation direction of a capacitor-start capacitor-run motor
  • Describe the characteristics of a three-phase wye distribution system
  • Describe the characteristics of a three-phase delta distribution system
  • Describe how to identify a three-phase delta distribution system using a multimeter
  • Describe how to identify a phase sequence of a three-phase distribution system
  • Describe how to identify and troubleshoot a thermal overload protection device
  • Connect and operate single-phase transformers in a wye-to-delta configuration
  • Identify line-side and load-side terminal and color designations
  • Describe the symptoms resulting from the loss of one phase (single phasing) on a three-phase motor
  • Describe the component/operation and schematic symbols for split-phase, capacitor-start, capacitor-run, and shaded pole AC motors
  • Describe how to troubleshoot motor capacitor failure
  • Describe the purpose of a bleeder resistor
  • Describe how to reverse the rotation of a capacitor-start motor
  • Describe how to reverse the rotation direction of a capacitor-start capacitor-run motor
  • Describe the characteristics of three-phase AC electricity
  • Describe the component/operation and schematic symbols for wound rotor and squirrel-cage AC motors 
  • Describe how to identify single-phase and three-phase motors from their physical characteristics
  • Define slip on an AC induction motor
  • Describe the importance of power factor correction
  • Describe the construction and operation of a squirrel-cage induction motor
  • Describe how to connect a single-voltage three-phase motor
  • Describe how to connect a dual-voltage wye motor
  • Describe how to connect a wye-delta motor
  • Describe how to reverse the rotational direction of a three-phase motor
  • Describe the operation and troubleshooting of a mechanical brake
  • Describe the operation and troubleshooting of a dynamic braking system
  • Describe the operation and troubleshooting of a manual motor control plugging circuit
  • Describe the operation and troubleshooting of DC injection braking
  • Describe how to troubleshoot a reduced voltage starting system
  • Describe how to troubleshoot a primary resistor starting system
  • Describe how to troubleshoot a autotransformer reduced voltage motor starter
  • Describe how to troubleshoot a three-phase motor starter
  • Describe proper lubrication techniques
  • Describe the function of an air filter
  • Describe the operation of an air filter and give its schematic symbol
  • Drain a pneumatic filter
  • Describe two methods of removing water vapor from a pneumatic system
  • Describe four symptoms of filter failure and their causes
  • Describe how to inspect and troubleshoot a filter
  • Describe the starting of a motor with an AC drive versus an across the line motor starter
  • Describe the external control inputs and outputs commonly available on a variable frequency AC drive
  • Connect a variable frequency AC drive for a two or three-wire control
  • Identify appropriate grounding and shielding techniques to reduce Electromagnetic Interference (EMI)
  • Describe how frequency affects the speed on an AC induction motor
  • Describe the output of a variable frequency drive
  • Define Volts per Hertz ratio and explain how it affects the torque capabilities of a motor
  • Define ramping and explain its importance
  • Describe S-curve acceleration and how it is used
  • Describe DC injection braking using a variable frequency AC drive and give an application
  • Describe how to troubleshoot a circuit that includes a variable frequency AC drive
  • Describe open-loop and closed-loop AC motor controls
  • Describe the function of regenerative discharge in AC drives and explain its importance
  • Describe the function of vector control and explain why it is important
  • Describe the possible limitations of some AC motors for inverter applications
  • Describe the functions of common AC drive parameters
  • Describe the function and operation of the PWM switching circuitry in an AC drive
  • Describe the basic procedure to properly set up an AC drive
  • Describe the basic procedure used to troubleshoot an AC drive system
  • Describe the maintenance procedures for an electronic motor drive
  • Who should take this test?

    This certificate is aimed at intermediate-level trades, technicians and technologists who will assemble, install, startup, troubleshoot, modify or repair machines or processes utilizing electric motors that require more than simple across-the-line starting. It is expected that those sitting for this exam will have passed Industrial Electricity 1 and Industrial Electricity 2 or have equivalent knowledge and experience. 

  • How long does it take to complete the test?

    Approximately 2 ¾ Hours

  • From the time of purchase, how long do I have to take the test?

    You must complete your test within 6 months of completing your purchase. After 6 months, you will no longer have access to your test. 

  • How many times can I attempt the test?

    You will have only one attempt at passing the test per purchase.