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WorksheetsMaintenance Electrical and Robotics Systems
Total questions: 35
Worksheet time: 19mins
What is the current of a series circuit with a total resistance of 10 ohms and a voltage of 110 V
0.09
11.0
1100.0
10.0
What is the total resistance of the circuit shown above?
0.33 Ω
31 Ω
3.0 Ω
10 Ω
Which of the following would happen if you were to add additional voltage to a circuit? Check all that apply.
The voltage would increase
The current would increase
The resistance would increase
The bulbs would become brighter
If the current through the battery was 10A in this diagram. What would the current through each identical bulb be?
The voltage dropped across the 300 ohm resistor is
(Hint: Find equivalent resistance, use Ohm's Law to solve for total current, then use Ohm's Law to solve for voltage drop at the 300 ohm resistor)
6 V
9 V
2 V
30 V
Two resistors are connected in series. How is the total resistance calculated?
R1 + R2
R1 x R2
(R1 x R2) / (R1 + R2)
(R1 +R2) / (R1 x R2)
What happens to the current as more resistors are added to the circuit?
It increases
It decreases
It fluctuates randomly
It remains the same
Switch that stops the flow of electrical current when a circuit is overloaded.
Fuse
Circuit Breaker
Open Circuit
What should be done in case of waterlogging near an industrial robot?
a) Touch the robot to check for damage
b) Immediately attempt to restart the robot
c) Cut off all power and drain the site
d) Remove all safety equipment to avoid electrical hazards
Why is it important to ensure emergency stop equipment remains unblocked?
a) It allows for faster robot movements
b) It prevents unauthorized personnel from using the robot
c) It ensures quick response in emergency situations
d) It improves the aesthetic appearance of the robot workspace
What is a mandatory measure before starting an industrial robot?
a) Ensuring nobody is within the danger area
b) Running a full-speed test with operators present
c) Allowing untrained personnel to supervise operation
d) Disabling the emergency stop function to prevent interruptions
Before switching on a robot, what must be confirmed about the installation site’s power supply?
a) The voltage and frequency meet the robot’s requirements
b) The site has backup power in case of failure
c) The power supply is shared with other heavy machinery
d) The site has unprotected wiring for easy troubleshooting
During a robot test run, why should the operating speed be initially set to 10%?
A) To avoid excessive wear on robot joints
B) To reduce energy consumption
C) To confirm the teaching action and detect problems
D) To meet international safety standards
What should be done before entering the safety fence for teaching purposes?
A) Ensure that the robot is in automatic mode
B) Turn on the teach pendant's manual mode
C) Increase the robot's speed gradually
D) Disable all emergency stop buttons
What is a major risk if the gripping force of the workpiece is insufficient?
A) The robot might move slower than expected
B) The workpiece might be thrown off during movement
C) The robot will stop functioning
D) The system will automatically shut down
If a robot fault occurs during automatic operation, what is the correct first step?
A) Restart the system immediately
B) Check the displayed fault information and follow recovery steps
C) Manually move the robot out of the working area
D) Ignore the fault if the robot is still operational
During robot repair, what must be done before entering the safety fence?
A) Confirm that all protective devices are functional
B) Turn on the robot to low power mode
C) Increase the operating speed to detect faults
D) Ensure the supervisor is inside the fence with the operator
Why must the teaching process involve both an operator and a supervisor?
A) To reduce errors in the robot’s programming
B) To ensure safety and monitor for abnormal robot movements
C) To train new employees on robot teaching
D) To increase productivity by dividing work
What should be done before replacing a drive module in a robot?
A) Turn off the power and wait at least seven minutes
B) Remove connectors while the power is still on
C) Increase the power voltage for testing
D) Ensure the robot arm is freely moving
A maintenance worker replaces a control circuit in a robotic system but fails to check the schematic diagram. What is the most likely consequence?
A) The robot will operate more efficiently
B) External components may be damaged
C) The control cabinet will reset automatically
D) The robot will require less maintenance in the future
If a fuse blows in an electrical system, the best approach is to replace it immediately without investigating the cause.
True
False
In a situation where a production line is about to be replaced, a technician finds a broken motor. What is the best decision?
A) Replace the motor with a brand-new identical model
B) Fix the motor so it works for a short time
C) Upgrade the motor to a better model
D) Ignore the motor problem until the system is replaced
Under heavy load conditions with frequent breakdowns, a technician must choose among repairing, replacing, or upgrading a motor. Which reason best supports upgrading the motor?
A) The repair cost is lower than replacement
B) The new motor can reduce future downtime and repair work
C) Parts for the old motor are easier to find
D) The technician is more familiar with the old motor’s design
A lab instrument has a blown fuse, but it shows no signs of overload during normal use.
What should the technician do next?
A) Replace the fuse with one of the same rating.
B) Replace the fuse with one of a higher rating.
C) Check the circuit for hidden shorts or damage.
D) Increase the circuit voltage.
An electric motor causes its circuit’s fuse to blow right after startup, but once running, the motor works fine.
What is the most likely reason?
A) The fuse is too sensitive.
B) The motor uses too much current during normal operation.
C) The motor draws a high surge of current at startup.
D) The wiring insulation is damaged.
A technician checks an integrated circuit (IC) on a circuit board. When he touches the IC, it feels very hot. What is the most likely problem?
A) The IC is working normally.
B) The IC has a short circuit.
C) The IC is designed to run hot.
D) The room temperature is too high.
A troubleshooting guide states that components have expected temperature ranges. A technician finds that a resistor, which should be warm during operation, feels cold compared to similar boards. What is the likely issue?
A) The resistor is working perfectly.
B) The resistor might be an open component (faulty).
C) The circuit is running in a very cold environment.
D) The resistor is newer than the other components.
A maintenance worker finds that an industrial machine gives a small shock when touched, even though the machine is turned off. What is the most likely issue?
A) Short circuit in the machine
B) Open circuit in the control system
C) Faulty grounding
D) Normal static electricity
A household appliance’s fuse blows repeatedly. On inspection, the technician sees that one of the ICs is glowing red and emitting smoke. Which condition does this suggest?
A) Open circuit
B) Short circuit
C) Loose connection
D) Faulty grounding
A technician is testing an LED panel. He measures a resistor and finds no electrical continuity, even though the resistor appears to be in good condition. What does this indicate?
A) The resistor is shorted
B) The resistor is open (broken circuit)
C) The resistor is working normally
D) The resistor has a faulty ground connection
While checking a sensor circuit, a technician notices that the voltage drops to zero and no current flows, although the sensor looks fine. What is most likely happening?
A) Short circuit in the sensor
B) Open circuit in the wiring or component
C) Faulty grounding in the sensor
D) Normal behavior for this sensor
A maintenance worker finds that an industrial machine gives a small shock when touched, even though the machine is turned off. What is the most likely issue?
A) Short circuit in the machine
B) Open circuit in the control system
C) Faulty grounding
D) Normal static electricity
During maintenance of a power supply unit, a technician measures 60V on the metal case relative to true ground. What does this most likely mean?
A) There is a short circuit on the board
B) The case is not properly grounded
C) There is an open circuit in the case connection
D) It is normal for this unit to show 60V
