#1
Which component is responsible for converting AC to DC in an electrical system?
Transformer
Rectifier
Inductor
Capacitor
#2
What is the function of a relay in an electrical control system?
To amplify signals
To switch electrical circuits on or off
To measure resistance
To generate electricity
#3
What is the primary function of a surge protector in an electrical system?
To regulate voltage
To protect against overvoltage spikes
To amplify signals
To generate electricity
#4
What is the primary function of a transformer in an electrical system?
To regulate voltage
To convert AC to DC
To store electrical energy
To change voltage levels in an alternating current circuit
#5
What is the primary purpose of a capacitor in a power factor correction system?
To store electrical energy
To regulate voltage
To improve power factor by supplying reactive power
To control temperature
#6
What does the term 'Ohm's Law' define?
Voltage equals current multiplied by resistance
Current equals voltage multiplied by resistance
Resistance equals voltage divided by current
Voltage equals resistance divided by current
#7
In a three-phase electrical system, how many degrees are there between each phase?
60 degrees
90 degrees
120 degrees
180 degrees
#8
What is the primary purpose of a capacitor in an electrical circuit?
To store electrical energy temporarily
To increase voltage
To resist the flow of current
To control temperature
#9
What does the term 'PLC' stand for in the context of industrial automation?
Programmable Logic Controller
Power Line Conditioner
Parallel Logic Circuit
Primary Loop Controller
#10
What does the term 'SCADA' stand for in industrial automation?
Sequential Control and Data Acquisition
Supervisory Control and Data Acquisition
Systematic Control and Data Analysis
Synchronous Control and Data Aggregation
#11
What is the purpose of a PID controller in a control system?
To regulate process parameters using proportional, integral, and derivative actions
To provide power distribution
To convert AC to DC
To measure voltage
#12
Which of the following devices is used to protect electrical circuits from overcurrent?
Transistor
Fuse
Resistor
Diode
#13
In a magnetic contactor, what is the role of the coil?
To provide mechanical support
To generate magnetic force
To control temperature
To store electrical energy
#14
What is the purpose of a VFD (Variable Frequency Drive) in motor control?
To regulate voltage
To control motor speed by adjusting the frequency of the electrical supply
To measure resistance
To amplify signals
#15
What is the role of a diode in an electrical circuit?
To store electrical energy
To regulate voltage
To control temperature
To allow current flow in one direction only