10+ Power Mech Projects Interview Questions and Answers for Freshers

Electrical panels can be used by various types of contractors.

• Electrical contractors are the most common type of contractors who use electrical panels.

• General contractors may also use electrical panels for specific projects.

• HVAC contractors may require electrical panels for their heating and cooling systems.

• Plumbing contractors may need electrical panels for water heaters or pumps.

• Fire protection contractors may use electrical panels for fire alarm systems.

• Security system con...read more

Transformer safety parts include fuses, circuit breakers, and grounding systems.

• Fuses protect against overcurrent and short circuits.

• Circuit breakers protect against overloads and faults.

• Grounding systems prevent electrical shock and protect equipment.

• Other safety parts may include temperature sensors and pressure relief devices.

A chiller is a machine that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle. An AHU (Air Handling Unit) is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system.

• Chillers are commonly used in commercial and industrial buildings to cool water or other fluids for air conditioning or process cooling.

• AHUs are responsible for conditioning and distributing air throughout a building, ensu...read more

A sun t relay is a type of time-delay relay used in electrical systems.

• It is used to control the operation of a circuit based on a time delay.

• It is commonly used in lighting systems to delay turning on or off.

• It can also be used in motor control circuits to prevent damage from sudden power surges.

• The delay time can be adjusted to suit the specific needs of the circuit.

• It works by using a small current to charge a capacitor, which then triggers the relay after a set amount of ...read more

AC current changes direction periodically while DC current flows in one direction only.

• AC current is used in household appliances while DC current is used in batteries and electronic devices.

• AC current can be easily transformed into different voltages using a transformer while DC current cannot.

• AC current is more dangerous to humans than DC current because it can cause muscle contractions.

• DC current is more efficient for long-distance power transmission because it experiences...read more

Various types of MCBs are used in the panel.

• Type B MCB for general purpose circuits

• Type C MCB for circuits with inductive loads

• Type D MCB for circuits with high inrush currents

• Type K MCB for circuits with high inrush currents and motors

• Type Z MCB for circuits with DC components

• Type F MCB for circuits with sensitive equipment

• Type G MCB for circuits with surge protection

• Type L MCB for lighting circuits

The question is unclear. Please provide more context.

• Please provide more information about the fault.

• Are you asking about fault-finding techniques or the number of people required to find a fault?

• Without more context, it is difficult to provide a specific answer.

Capacitors are used to store and release electrical energy in circuits.

• Capacitors can filter out noise and stabilize voltage in power supplies.

• They can also be used in timing circuits and oscillators.

• Capacitors are commonly used in audio equipment to filter out unwanted frequencies.

• They can also be used in electric motors to improve power factor and efficiency.

• Capacitors are essential components in electronic devices and circuits.

Voltage is the measure of electric potential difference between two points in a circuit.

• Voltage is measured in volts (V).

• It is the force that drives electric current through a circuit.

• Voltage can be positive or negative depending on the direction of the current flow.

• A battery provides a voltage difference between its terminals to power a circuit.

• Voltage drop occurs when there is a decrease in voltage along a circuit due to resistance or other factors.

Under voltage can cause major electrical problems.

• Under voltage can cause equipment damage and failure.

• It can also lead to power outages and disruptions.

• Proper monitoring and maintenance can prevent under voltage issues.

• Examples of under voltage problems include brownouts and voltage sags.

Flow transmitters are devices used to measure the flow rate or quantity of a fluid in a pipe or duct.

• Differential pressure flow meters

• Magnetic flow meters

• Ultrasonic flow meters

• Vortex flow meters

• Coriolis flow meters

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is represented by the formula V = IR, where V is voltage, I is current, and R is resistance.

• It helps in calculating the current, voltage, or resistance in a circuit when the other two values are known.

• For example, if a circuit has a voltage of 12V and a resistance of 4 ohms, the current flowing...read more

Wiring and boards are essential components of electrical systems.

• Wiring refers to the physical connections between electrical components.

• Boards are used to organize and control the flow of electricity.

• Proper wiring and board design are crucial for safety and efficiency.

• Examples of boards include circuit breaker panels and control boards for industrial machinery.