TRF Interview Questions and Answers

Current flows through the filament of the bulb, heating it up and causing it to emit light.

• Electric current flows through the filament of the bulb

• The filament heats up due to the resistance it offers to the flow of current

• The heat causes the filament to emit light

• Voltage determines the amount of current that flows through the bulb

The formula for vernier caliper least count is the difference between the main scale division and the vernier scale division.

• The formula is: Least Count = Main Scale Division / (Total Number of Divisions on Vernier Scale - 1)

• The main scale division is the distance between two consecutive main scale graduations.

• The vernier scale division is the distance between two consecutive vernier scale graduations.

• The least count is the smallest measurement that can be read on the vernier...read more

1 inch is equal to 25.4 mm.

• 1 inch is a unit of length commonly used in the imperial system.

• mm stands for millimeter, which is a unit of length in the metric system.

• To convert inches to millimeters, you multiply the inch value by 25.4.

• For example, 2 inches is equal to 50.8 mm (2 * 25.4).

The laws of thermodynamics are fundamental principles that govern the behavior of energy in physical systems.

• The first law states that energy cannot be created or destroyed, only transferred or converted.

• The second law states that the total entropy of a closed system will always increase over time.

• The third law states that it is impossible to reach absolute zero temperature.

• These laws have important applications in fields such as engineering, physics, and chemistry.

• For exampl...read more

The area of a rectangle is calculated by multiplying its length and width.

• To find the area of a rectangle, multiply its length and width.

• The formula for the area of a rectangle is A = l x w.

• The units of the area will be the square of the units of the length and width.

• For example, if the length is 5 units and the width is 3 units, the area would be 15 square units.

Quality control refers to the process of ensuring that products or services meet the desired level of quality.

• It involves setting quality standards and ensuring that they are met

• It includes monitoring and inspecting products or services to identify defects or issues

• It also involves taking corrective action to address any problems that are identified

• Examples include conducting product testing, performing audits, and implementing quality improvement initiatives

SLD of electricity substation to MCB involves mapping the electrical system and identifying the circuit breakers.

• Create a schematic diagram of the substation

• Identify the main components of the electrical system

• Map out the electrical connections between the components

• Identify the circuit breakers and their ratings

• Assign MCBs to each circuit based on their ratings

• Ensure that the MCBs are compatible with the electrical system

• Label the SLD and MCBs for easy identification