Electrical Safety Systems Quiz

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Questions and Answers

What is the ILO C167 convention related to?

Hygiene in Commerce and Offices

Work equipment and machinery safety

Drinking water standards

Safety and Health in Construction (correct)

Which factor is not considered for a safe working environment?

Risk of explosion

Risk of noise and vibration

Risk of electricity hazards

Risk of marketing strategies (correct)

What is the ILO C120 convention related to?

$ILO$ $C120$ - Hazardous Substance Management

$ILO$ $C120$ - Safety and Health in Construction

$ILO$ $C120$ - Welfare Provision Standards

$ILO$ $C120$ - Hygiene (Commerce and Offices) (correct)

What are the hazards analyzed for mobile working equipment or vehicles at a site?

$Electricity$, $mobile$ $working$ $equipment$, $vehicles$, $maintenance$ Signup and view all the answers

What are the minimum standards for sanitary conveniences?

Separate for men and women; protected from weather Signup and view all the answers

What is the main advantage of double insulation?

Increased safety and elimination of the need for earth wiring Signup and view all the answers

How do residual current devices (RCDs) protect human life?

By sensing current imbalance and tripping the circuit Signup and view all the answers

What is the purpose of isolation of supply?

To remove electrical power from a circuit or system Signup and view all the answers

What is the primary function of fuses and miniature circuit breakers?

Prevent current overload and protect equipment Signup and view all the answers

What are the disadvantages of residual current devices (RCDs)?

The need for regular testing and the possibility of false tripping Signup and view all the answers

What type of equipment does double insulation apply to?

Class II equipment Signup and view all the answers

What are the preventive measures for health issues associated with working in hot environments?

Ventilation, insulation, providing cool refuges, drinking water, and frequent breaks Signup and view all the answers

What are the three parameters linked together by Ohm's Law in the context of electricity?

Voltage, current, and resistance Signup and view all the answers

What are the hazards and risks of electricity mentioned in the text?

Electric shock, burns, fires and explosions, arcing, and secondary effects Signup and view all the answers

What influences the severity of electrical injuries according to the text?

Skin condition, clothing, exposure time, and environmental factors like temperature and humidity Signup and view all the answers

What causes electrical fires and explosions as per the text?

Faulty electrical equipment, overloaded systems, and flammable atmospheres Signup and view all the answers

What temperature range can cause structural steels to weaken and lose strength?

425°C - 650°C Signup and view all the answers

What are the risks associated with working at height?

Risk of falls and falling materials Signup and view all the answers

How can engineers maintain the integrity of a structure in relation to temperature?

By considering the temperature range the structure will be subjected to during its lifespan Signup and view all the answers

What measures can be taken to reduce the risk of falls when working at height?

Avoiding work at height, modifying the work process or design, and ensuring proper selection, use, and maintenance of access equipment Signup and view all the answers

What are the potential consequences of falls from any height?

Fatal or major injury even from less than two meters Signup and view all the answers

How can falls from height be prevented?

Proper planning, selection of correct equipment, and regular inspection of the workspace and work methods Signup and view all the answers

What should be considered when using ladders for working at height?

Siting them away from live overheads, securing them properly, and extending them to the correct height Signup and view all the answers

What is essential for working safely at height?

Proper training and adherence to regulations Signup and view all the answers

How can risks of falling materials be minimized?

Ensuring proper selection, use, and maintenance of access equipment Signup and view all the answers

Study Notes

Engineers must account for various environmental conditions that can affect structural integrity, such as natural disasters and improper operational conditions.
Structural steels, commonly used in large construction projects, can weaken and lose strength at high temperatures (425°C and 650°C respectively).
High temperatures can cause steel to buckle and twist, compromising structural integrity.
Engineers must consider the temperature range a structure will be subjected to during its lifespan to maintain its integrity.
Working at height is a hazardous activity with risks of falls and falling materials.
Risks of falling include death, neck and spinal injury, and broken bones.
Falls can occur from any height, and less than two meters can be fatal or cause major injury.
Risks of falling materials include crumbling brickwork, loose tiles, and bad housekeeping.
To reduce the risk of falls, consider avoiding work at height, modifying the work process or design, and ensuring proper selection, use, and maintenance of access equipment.
Control measures for the safe use of ladders include siting them away from live overheads, securing them properly, and extending them to the correct height.
Working at height requires proper training and adherence to regulations.
Falls from height can be prevented through proper planning, selection of correct equipment, and regular inspection of the workspace and work methods.

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Description

Test your knowledge of earthing, isolation of supply, double insulation, residual current devices (RCDs), fuses, and miniature circuit breakers. Learn about the advantages and disadvantages of these electrical safety systems.