10+ Electrical Site Engineer Interview Questions and Answers for Freshers

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 determined by factors such as insulation material, conductor size, ...read more

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 against impact or crushing.

• Using cable guards or ramps can p...read more

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 such as temperature and load conditions.

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 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 usually connected to a grounding electrode, such as a metal ro...read more

Transmission & distribution refers to the movement of electricity from power plants to consumers.

• Transmission involves high voltage power lines that transport electricity over long distances

• Distribution involves lower voltage lines that deliver electricity to homes and businesses

• Both are essential components of the electrical grid

• Examples of transmission equipment include transformers, circuit breakers, and substations

• Examples of distribution equipment include power poles, tr...read more

There are two types of insulators: Pin type and Suspension type.

• Pin type insulators are used for low voltage distribution lines.

• Suspension type insulators are used for high voltage transmission lines.

• Pin type insulators are mounted on the cross-arm of the pole.

• Suspension type insulators are suspended from the cross-arm of the tower.

• Pin type insulators have only one insulating unit.

• Suspension type insulators have multiple insulating units connected in series.

Maintenance in bus bar system is necessary to ensure safety and reliability of electrical power distribution.

• Prevents overheating and potential fire hazards

• Identifies and repairs damaged or corroded components

• Ensures proper grounding and insulation

• Improves overall efficiency and reduces downtime

• Regular cleaning and inspection of bus bars

• Testing for continuity and resistance

• Tightening of connections and bolts

• Replacement of worn out or damaged parts

A feeder is an electrical circuit that supplies power to a branch circuit or a group of circuits.

• Feeder is used to distribute power to various loads in a building or facility.

• It is typically a larger gauge wire than the branch circuit it supplies.

• Feeder can be overhead or underground depending on the installation.

• Examples of feeders include the main electrical service entrance and subpanels.

• Feeder protection devices include circuit breakers and fuses.

Distribution boards are used to distribute electrical power to various circuits and equipment.

• Main distribution board (MDB) is used to distribute power to sub-distribution boards.

• Sub-distribution boards (SDB) are used to distribute power to final circuits.

• Final distribution boards (FDB) are used to distribute power to equipment.

• Motor control centers (MCC) are used to control and distribute power to motors.

• Lighting distribution boards (LDB) are used to distribute power to ligh...read more

Different types of cable trays include ladder, perforated, solid bottom, wire mesh, and trough.

• Ladder cable trays have horizontal cross members resembling a ladder.

• Perforated cable trays have small holes for ventilation and drainage.

• Solid bottom cable trays have a solid base for supporting cables.

• Wire mesh cable trays have a grid-like structure for easy cable installation.

• Trough cable trays have a U-shaped design for containing cables.

General Arrangement drawings show the overall layout of electrical systems in a building or structure.

• GA drawings provide an overview of the entire electrical system layout

• They include details such as equipment locations, cable routing, and connection points

• These drawings are essential for understanding the overall design and installation of electrical systems

• Examples of GA drawings include floor plans with electrical equipment locations marked, cable tray layouts, and panel ...read more

Anticarsia gemmatalis, also known as the velvetbean caterpillar, is a common pest in agriculture.

• Anticarsia gemmatalis is a species of moth in the family Erebidae.

• It is a major pest of soybean crops, feeding on the leaves and causing significant damage.

• Control measures for velvetbean caterpillars include biological control agents, insecticides, and crop rotation.

• Monitoring for early signs of infestation can help prevent widespread damage to crops.

Pole types refer to the different materials and designs used for electrical poles, each with their own specific use.

• Wooden poles are commonly used for low voltage distribution lines.

• Steel poles are used for high voltage transmission lines.

• Concrete poles are used for areas with high wind loads or corrosive environments.

• Fiberglass poles are used for areas with high moisture content or where conductivity is a concern.

• Pole types can also vary based on their design, such as tapere...read more

Tariff refers to the rate at which electricity is charged to consumers. There are different types of tariffs based on usage and time.

• Flat rate tariff - same rate for all units consumed

• Time of use tariff - different rates for different times of the day

• Seasonal tariff - different rates for different seasons

• Demand tariff - based on the maximum demand during a billing period

• Prepaid tariff - payment made in advance for a certain amount of electricity

• Net metering tariff - excess en...read more

The rule of cable laying involves proper planning, routing, securing, and labeling of cables to ensure safety and efficiency.

• Plan the cable routes to avoid interference with other systems or equipment.

• Secure cables properly to prevent damage or accidents.

• Label cables clearly for easy identification and maintenance.

• Follow local regulations and standards for cable laying practices.

• Consider factors like cable length, bend radius, and environmental conditions.

• Use cable trays, con...read more