Junior Trainee Interview Questions and Answers for Freshers

Pitch circle is an imaginary circle that passes through the point of contact of two meshing gears.

• It is used to determine the gear ratio and the velocity ratio of the gears.

• It is also used to calculate the center distance between the gears.

• The diameter of the pitch circle is proportional to the number of teeth on the gear.

• The pitch circle is also known as the reference circle or the pitch diameter.

Two stroke and four stroke are types of internal combustion engines used in vehicles and machines.

• Two stroke engines complete a power cycle in two strokes of the piston, while four stroke engines complete it in four strokes.

• Two stroke engines have a simpler design and are lighter, but are less fuel efficient and emit more pollutants.

• Four stroke engines are more complex and heavier, but are more fuel efficient and emit fewer pollutants.

• Examples of vehicles that use two stroke ...read more

Check if a number is odd or even without using loops

• Use bitwise AND operator with 1 to check if the least significant bit is 1 or 0

• If the result is 1, the number is odd. If the result is 0, the number is even

• Example: int num = 5; if((num & 1) == 1) { // odd number } else { // even number }

Star and Delta configurations are used in electrical transmission lines to manage voltage and current effectively.

• Star (Y) configuration connects one end of each phase to a common point, reducing voltage across each phase.

• Delta (Δ) configuration connects each phase to the next, allowing for higher current capacity and balanced load.

• Star is often used in low-voltage applications, while Delta is preferred for high-voltage systems.

• Example: Star connection is common in transforme...read more

SF6 breakers use sulfur hexafluoride gas for insulation and arc-extinguishing, providing efficient and reliable performance in electrical systems.

• SF6 (sulfur hexafluoride) is an excellent insulator, allowing for compact designs in substations.

• It has a high dielectric strength, which means it can withstand high voltages without breaking down.

• SF6 breakers are effective in interrupting electrical arcs, making them suitable for high-voltage applications.

• They are used in various a...read more