Mechatronics Flashcards
The diagram shows
OR logic - either input may be on to energize the coil.
Match the following type of switch.
Temperature
Level
Flow
Pressure
Flow
True or False: By changing the amplitude of a PWM signal, it is possible to change the direction of a servo motor.
False
True or False: An open-loop controller is also called a feedback controller.
False
The electric shock intensity
- increases with an increase in current flow
- increases with the length of time of exposure
- is determined in part by the pathway the current takes through the body
- all of these
- all of these
The central part of the motor with no windings that moves is called the ________
Rotor
Pneumatics
Is the field of liquid fluid power
Is the field of gas fluid power
The study of electrical fields
Motor control theory
Is the field of gas fluid power
As a PLC Programmer which one of these should be your objective(s).
Write a program that workds per specification.
Write code that protects equipment and ensures safety of operators. For example, adding alarms and soft-locks.
Do not comment so only you know how it works. This way understanding/debugging will be easiest for anyone reading the code.
- Write a program that works per specification.
- Write code that protects equipment and ensures safety of operators. For example, adding alarms and soft-locks.
- Write code in modular blocks and with comments. This way understanding/debugging will be easiest for anyone reading the code.
A ________ switch can be actuated without any physical contact.
level
proximity
pressure
limit
proximity
A PLC is an
Industrial computer with specialized hardware and software
Relay replacer
Modern Industrial controller
All of the above
- Industrial computer with specialized hardware and software
- Relay replacer
- Modern Industrial controller
- All of the above
Shown above is ladder logic for high temperature alarm. The timer will be enabled when “WX0: is above this _____ value.
3334
A single-acting pneumatic cylinder
Actuates in one direction and spring or mechnically returns
Solenoid valves are available to control:
Oil flow
Air flow
Water flow
All of these
All of these
Which of the following will generate a “communication error” between an OIT and PLC?
Syntax error in PLC
Mismatch of communication protocol between OIT and PLC.
Bad communication cable.
No backup battery in PLC.
Mismatch of communication protocol between OIT and PLC
Bad communication cable
Two sources of energy are produced by a Cogeneration plant: Electricity and ____________.
Salt
Nitrogen
Heated water
Oxygen
Heated water
Variable Frequency Drives (VFDs) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to it. Match the characteristics of the signal from VFD that controls the response of electric motor.
RPM of motor
Amplitude of signal
Frequency of signal
Frequency of signal
Variable Frequency Drives (VFDs) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to it. Match the characteristics of the signal from VFD that controls the response of electric motor.
Load of motor
Amplitude of signal
Frequency of signal
Amplitude of signal
In order to use a solenoid valve on a pneumatic cylinder
- The exhaust must be released from the opposite end of the cylinder.
- The pressure rating of the valve must exceed the opposite end of the cylinder.
- The operating voltage must be equal to the PLC output voltage.
- All of the above.
All of the above
The stationary part of the winding of the motor is called the _______.
Rotor
Commutator
Capsule
Stator
Stator
True of False: A controller in a closed-loop system adjusts the control signal to the system based on current state of input and current output.
True
What is the difference between process and motion control?
Process Control - the setpoint typically remains unchanged, and emphasis is on maintaining a constant condition.
Motion Control - the setpoint is constantly changing, and the emphasis is on following the changes as quickly as possible.
Process Control - the setpoint continuously changes on changing output of the system.
Motion Control - the setpoint changes both on output and external temperature.
Process Control - the setpoint is constantly changing, and the emphasis is on following the changes as quickly as possible.
Motion Control - the setpoint typically remains unchanged, and emphasis is on maintaining a constant condition.
Process Control - the setpoint typically remains unchanged, and emphasis is on maintaining a constant condition.
Motion Control - the setpoint is constantly changing, and the emphasis is on following the changes as quickly as possible.
Output modules provide the interface to devices like
motors, pilot lights and alarms.
pushbuttons, limit switches and selector switches
analog devices
timers and counters
motors, pilot lights and alarms
A double-acting pneumatic cylinder
Actuates in one direction and spring or mechanically returns
Actuates in two directions - in and out.
Rorates the shaft
Actuates in two directions - in and out.
In the diagram, contact X1 does what?
Releases the sealing circuit and turns off relay Y0.
Temporarily turns off the Y0 relay
Allows X1 to operate
All of the above
Releases the sealing circuit and turns off relay Y0.
What is the proper distance from the feet of a straight ladder to the wall?
one-half the height of the ladder
one-fourth the working height of the ladder
three-quarters the height of the ladder
one-half the working height of the ladder
one-fourth the working height of the ladder
Match the following type of switch.
Temperature
Level
Flow
Pressure
Pressure
Match the following type of switch.
Temperature
Level
Flow
Pressure
Temperature
Match the following type of switch.
Temperature
Level
Flow
Pressure
Level
Which of the following statement(s) is correct about the logic shown.
Stage transitions are as follows: S0, S1, S2
Stage S1 is never executed.
Stage transistions are follows: S0, S2, S1
Stage S2 is never executed.
Stage S1 is never executed.
Select the logic(s) that are correct.
Coil C0 = OFF, Coil C1 = OFF, Coil C2 = ON, Coil Y0 = ON
Coil C0 = ON, Coil C1 = OFF, Coil C2 = OFF, Coil Y0 = ON
Coil C0 = OFF, Coil C1 = ON, Coil C2 = OFF, Coil Y0 = OFF
Coil C0 = ON, Coil C1 = ON, Coil C2 = OFF, Coil Y0 = ON
Coil C0 = OFF, Coil C1 = OFF, Coil C2 = ON, Coil Y0 = ON
Coil C0 = ON, Coil C1 = OFF, Coil C2 = OFF, Coil Y0 = ON
Coil C0 = OFF, Coil C1 = ON, Coil C2 = OFF, Coil Y0 = OFF
One of the components of a typical PLC are:
Processor (CPU)
Input modules
Output modules
Power supply.
All of the above
All of the above
Two sources of energy are produced by a Cogeneration plant: Electricity and ________.
Salt
Nitrogen
Heated water
Oxygen
Heated water
Below is an example of motor control logic. Which of the following statement(s) is true?
The motor (Y)) has to wait 2 seconds before it can be restarted.
The Motor (Y0) will need a five (5) minute delay between each start.
The MotorRestLock (CT0.Done) cannot be overridden by Start (X0).
The Motor (Y0) will need a five (5) minute delay after every two consecutive starts before it can be restarted.
The MotorRestLock (CT0.Done) cannot be overridden by Start (X0).
The Motor (Y0) will need a five (5) minute delay after every two consecutive starts before it can be restarted.
An electrical device that is commonly used to increase or decrease AC voltage levels.
Transformer
Resistor
Capacitor
Inductor
Transformer
A limit switch is usually actuated by:
hand
contact with an object
pressure
an electromagnet
contact with an object
Given is an example of logic that keeps track of number of pump starts. What will be the value of CT0.Acc after the pump stops for the second time.
0
1
2
3
0
In the diagram, contact X1 does what?
Releases the sealing circuit and turns off relay Y0.
Temporarily turns off the Y0 relay.
Allows X1 to operate
All of the above.
Releases the sealing circuit and turns off relay Y0.
True or False: VFDs can help reduce energy costs for industrial applications because they allow you to match speed of the motor driven equipment to the load requirement.
True
False
True
The _________ is used to turn the generator in a hydroelectric power plant.
Rotor
Stator
Turbine
Electrical power
Turbine
The graph shows mapping of a 12bit 4-20 mA analog current input to decimal value. What will be an approximate decimal reading if current input is 15 mA?
2815
The diagram shows:
AND logic - both inputs must be on to energize the coil.
OR logic - either input may be on to energize the coil.
Sealing circuit in order to latch the output.
None of the above
AND logic - both inputs must be on to energize the coil.
What will be the maximum decimal reading from a 16 bit 4-20 mA analog input card?
32
256
65535
55000
65535
Shown above is ladder logic for high temperature alarm. The timer will be enabled when “WXO” is above this ______value.
3334
Based on the ladder logic above, which type of push button would be most appropriate to implement an “Alarm Reset” (DLC1) in OIT?
momentarily off
momentarily on
toggle off
toggle on
momentarily on
