KEI Industries Electrical Site Engineer Interview Questions and Answers

The maximum range of voltage rating for belted cables varies depending on the specific application and industry standards.

• The voltage rating of belted cables can range from low voltage (LV) to high voltage (HV).

• LV belted cables typically have a voltage rating of up to 1 kV.

• HV belted cables can have voltage ratings ranging from 1 kV to several hundred kilovolts (kV).

• The exact voltage rating of belted cables is determine...read more

Conventional flow assumes charges flow from positive to negative terminals.

• Conventional flow is based on the assumption that current flows from positive to negative terminals.

• This convention is used in electrical engineering and circuit analysis.

• For example, in a battery-powered circuit, conventional flow assumes that electrons flow from the positive terminal of the battery to the negative terminal.

The torque a synchronous motor can develop depends on its size and design.

• The torque is directly proportional to the current supplied to the motor.

• The torque also depends on the strength of the magnetic field produced by the rotor.

• Larger synchronous motors can develop higher torque than smaller ones.

• For example, a 500 kW synchronous motor can develop a torque of around 1500 Nm.

• The torque can also be affected by factors

Cable protectors can safeguard cables against mechanical injury.

• Cable protectors can be used to cover and shield cables from physical damage.

• Flexible conduits or cable trays can be installed to provide a protective pathway for cables.

• Using cable ties or clamps to secure cables in place can prevent them from being accidentally pulled or strained.

• Applying cable armor or armored cables can provide additional protection ag...read more

The earth wire or ground wire is typically made of copper or aluminum.

• The earth wire is an essential safety component in electrical systems.

• It is used to provide a path for electrical current to safely discharge into the ground.

• Copper is commonly used for earth wires due to its excellent conductivity and corrosion resistance.

• Aluminum is also used in some cases, especially for overhead power lines.

• The earth wire is usua...read more

The average resistance of a human body is approximately 1,000 ohms.

• The resistance of a human body can vary depending on factors such as skin moisture, contact area, and voltage applied.

• Dry skin has higher resistance compared to moist skin.

• The resistance can be affected by the presence of sweat, water, or other conductive substances on the skin.

• The resistance decreases when the contact area between the body and a conduc...read more

GIS stands for Geographic Information System. ICT Protection refers to the protection of information and communication technology systems. REF stands for Relay Electronic Fundamentals.

• GIS is a system that captures, stores, analyzes, and presents geographic data.

• ICT Protection involves measures to safeguard information and communication technology systems from unauthorized access, damage, or disruption.

• REF is a branch o...read more

Various types of protections are used in Powergrid substation to ensure safety and reliability of the system.

• Overcurrent protection

• Under/overvoltage protection

• Differential protection

• Distance protection

• Frequency protection

• Ground fault protection

• Backup protection

• Isolation protection

• Lightning protection

GIS and AIS are two types of switchgear used in power systems.

• GIS stands for Gas Insulated Switchgear and uses SF6 gas as insulation.

• AIS stands for Air Insulated Switchgear and uses air as insulation.

• GIS is more compact and requires less maintenance than AIS.

• AIS is less expensive than GIS.

• GIS is used in high voltage applications while AIS is used in low to medium voltage applications.

The maximum range of voltage rating for belted cables varies depending on the specific application and industry standards.

• The voltage rating of belted cables can range from low voltage (LV) to high voltage (HV).

• LV belted cables typically have a voltage rating of up to 1 kV.

• HV belted cables can have voltage ratings ranging from 1 kV to several hundred kilovolts (kV).

• The exact voltage rating of belted cables is determine...read more

Conventional flow assumes charges flow from positive to negative terminals.

• Conventional flow is based on the assumption that current flows from positive to negative terminals.

• This convention is used in electrical engineering and circuit analysis.

• For example, in a battery-powered circuit, conventional flow assumes that electrons flow from the positive terminal of the battery to the negative terminal.

The torque a synchronous motor can develop depends on its size and design.

• The torque is directly proportional to the current supplied to the motor.

• The torque also depends on the strength of the magnetic field produced by the rotor.

• Larger synchronous motors can develop higher torque than smaller ones.

• For example, a 500 kW synchronous motor can develop a torque of around 1500 Nm.

• The torque can also be affected by factors

Cable protectors can safeguard cables against mechanical injury.

• Cable protectors can be used to cover and shield cables from physical damage.

• Flexible conduits or cable trays can be installed to provide a protective pathway for cables.

• Using cable ties or clamps to secure cables in place can prevent them from being accidentally pulled or strained.

• Applying cable armor or armored cables can provide additional protection ag...read more

The earth wire or ground wire is typically made of copper or aluminum.

• The earth wire is an essential safety component in electrical systems.

• It is used to provide a path for electrical current to safely discharge into the ground.

• Copper is commonly used for earth wires due to its excellent conductivity and corrosion resistance.

• Aluminum is also used in some cases, especially for overhead power lines.

• The earth wire is usua...read more

The average resistance of a human body is approximately 1,000 ohms.

• The resistance of a human body can vary depending on factors such as skin moisture, contact area, and voltage applied.

• Dry skin has higher resistance compared to moist skin.

• The resistance can be affected by the presence of sweat, water, or other conductive substances on the skin.

• The resistance decreases when the contact area between the body and a conduc...read more