Earthing Safety Trivia Quiz
Earthing is the electrical connection of the mains to the earth's conductive system. It is a necessary procedure that ensures safety from electrical misfirings during lightening and sparks. Earthing is unavoidable in electrical installation for industrial plants, mines, and residential buildings. How much do you know about this?
- 1.
Which of these serves more purposes other than electrical safety?
- A.
Single earthing
- B.
Double earthing
- C.
Functional earthing
- D.
Power earthing
Correct Answer
C. Functional earthingExplanation
Functional earthing serves more purposes other than electrical safety. It is used to provide a reference point for electrical circuits, ensuring proper functioning of equipment and preventing damage from voltage fluctuations. It also helps in reducing electromagnetic interference and improving the overall performance of electrical systems. Additionally, functional earthing is essential for the proper operation of sensitive electronic devices and for the safety of personnel working with electrical equipment.Rate this question:
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- 2.
Which of these devices uses functional earth connections?
- A.
Circuit breaker
- B.
Surge suppressor
- C.
Fuse
- D.
Electric sockets
Correct Answer
B. Surge suppressorExplanation
Surge suppressors are devices that protect electrical equipment from voltage spikes or surges. They typically use functional earth connections to redirect excess voltage to the ground, preventing it from damaging the connected devices. This grounding feature helps to protect against power surges and ensures the safety of the equipment and users. Circuit breakers and fuses, on the other hand, are designed to interrupt the flow of electricity in the event of an overload or short circuit, but they do not necessarily require functional earth connections. Electric sockets simply provide a means for connecting electrical devices to the power supply and do not involve functional earth connections.Rate this question:
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- 3.
What must be kept low to ensure voltage on exposed surfaces is not too high?
- A.
Impedance
- B.
Inductance
- C.
Current
- D.
Power
Correct Answer
A. ImpedanceExplanation
Impedance must be kept low to ensure voltage on exposed surfaces is not too high. Impedance is the total opposition that a circuit presents to the flow of alternating current. When impedance is high, it restricts the flow of current, leading to a higher voltage drop across the circuit. By keeping impedance low, the voltage on exposed surfaces can be controlled and kept at a safe level.Rate this question:
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- 4.
Which of these is not a method of shorting?
- A.
Spark gaps
- B.
Discharge tubes
- C.
Option 3
- D.
Bridge-type semiconductors
Correct Answer
D. Bridge-type semiconductorsExplanation
Bridge-type semiconductors are not a method of shorting. Shorting refers to the act of connecting two points in an electrical circuit with a conductor, resulting in a low resistance path. Spark gaps and discharge tubes are examples of devices that can be used for shorting. However, bridge-type semiconductors do not serve this purpose and are not typically used for shorting circuits.Rate this question:
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- 5.
Which of these does not support electromagnetic interference to prevent shocks?
- A.
Electrostatic coupling
- B.
Ignition systems
- C.
Electromagnetic induction
- D.
Conduction
Correct Answer
B. Ignition systemsExplanation
Ignition systems do not support electromagnetic interference to prevent shocks. Ignition systems are responsible for creating a spark to ignite the fuel-air mixture in an internal combustion engine. They generate high voltage pulses to produce the spark, but they do not have any specific mechanisms in place to prevent electromagnetic interference or to protect against shocks. On the other hand, electrostatic coupling, electromagnetic induction, and conduction are all mechanisms that can support electromagnetic interference and can potentially lead to shocks.Rate this question:
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- 6.
Which of these involves using the surge protector to limit voltage supplied to a device?
- A.
Blocking
- B.
Shorting
- C.
Powering
- D.
Impedance
Correct Answer
B. ShortingExplanation
Shorting involves using the surge protector to limit voltage supplied to a device. When a surge protector detects a voltage spike, it diverts the excess voltage to the ground, preventing it from reaching the connected device. This helps protect the device from damage caused by overvoltage.Rate this question:
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- 7.
How many types of wire system are installed in a modern house?
- A.
Four types
- B.
Three types
- C.
Six types
- D.
Five types
Correct Answer
B. Three typesExplanation
In a modern house, there are typically three types of wire systems installed. These include electrical wiring for powering appliances and lighting, telephone wiring for communication, and data wiring for internet and networking purposes. These three types of wire systems are essential for the functioning of a modern household and cater to different needs and requirements.Rate this question:
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- 8.
Which of these is not a wiring system in a modern house?
- A.
Live
- B.
Ground
- C.
Line
- D.
Neutral
Correct Answer
A. LiveExplanation
The live wire is actually a part of the wiring system in a modern house. It carries the electrical current from the power source to the electrical appliances and outlets. The ground wire, line wire, and neutral wire are also essential components of the wiring system. The ground wire provides a path for electrical current to safely discharge in case of a fault, the line wire carries the current from the power source, and the neutral wire completes the circuit. Therefore, the correct answer is Live.Rate this question:
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- 9.
Which of these electric systems does not use surge protection?
- A.
Process control systems
- B.
Communication systems
- C.
Bioresources systems
- D.
Industrial systems
Correct Answer
C. Bioresources systemsExplanation
Bioresources systems do not typically use surge protection because they are not directly connected to the power grid or other electrical systems. They often involve the use of natural resources such as plants or animals for various purposes like waste management or energy production. These systems do not rely heavily on electrical components and are designed to operate independently without the need for surge protection.Rate this question:
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- 10.
What voltage causes safety devices to short?
- A.
Clamping voltage
- B.
Shorting voltage
- C.
Threshold voltage
- D.
Quantal voltage
Correct Answer
A. Clamping voltageExplanation
Safety devices, such as surge protectors or voltage regulators, are designed to protect electrical devices from voltage spikes or surges. When the voltage exceeds a certain level, known as the clamping voltage, these safety devices will short the excess voltage to protect the connected devices. Therefore, the correct answer is "Clamping voltage".Rate this question:
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Current Version
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Mar 19, 2023Quiz Edited by
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Feb 07, 2019Quiz Created by
Gregorynaomi
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