Apptunix Interview Questions and Answers

Yes, I have extensive experience in electrical maintenance including troubleshooting, repair, and installation.

• Extensive experience in electrical maintenance

• Skilled in troubleshooting electrical issues

• Proficient in repairing electrical systems

• Experienced in installing new electrical components

• Familiar with electrical codes and regulations

An injection moulding machine is a manufacturing tool used to produce parts by injecting molten material into a mould.

• Uses molten material to create parts

• Consists of a hopper, barrel, heater bands, and injection unit

• Commonly used in manufacturing plastic parts

Star Delta starter is a type of reduced voltage starter used in three-phase induction motors.

• Consists of two contactors - one for star connection and one for delta connection

• Reduces starting current and torque in the motor

• Commonly used in applications where high starting torque is required

A diesel generator is a combination of a diesel engine with an electric generator to generate electricity.

• Diesel generator uses diesel fuel to power the engine which in turn drives the electric generator to produce electricity.

• Commonly used as a backup power source in case of power outages or in remote locations without access to the power grid.

• Diesel generators are available in various sizes ranging from portable units to large industrial generators.

• Regular maintenance and f...read more

A DOL starter is a Direct-On-Line starter used to start motors by directly connecting them to the power supply.

• DOL starters provide full voltage to the motor during start-up.

• They are simple in design and cost-effective.

• Commonly used for small to medium-sized motors.

• Helps in reducing the starting current drawn by the motor.

Micrometres and verniers are precision measuring tools used in engineering and manufacturing.

• Micrometres are used to measure small distances with high accuracy, typically up to 0.001mm.

• Verniers are used to measure the difference between two lengths, such as the diameter of a hole or the thickness of a sheet of metal.

• Both tools are commonly used in machining and manufacturing to ensure precise measurements and high-quality finished products.

Shrinkage of molds refers to the reduction in size of a molded part after it has cooled down.

• Shrinkage occurs due to the cooling and solidification of the molten material.

• It varies depending on the material being molded and the design of the mold.

• Shrinkage can be compensated for by adjusting the mold design or using materials with lower shrinkage rates.

• For example, plastics typically have a shrinkage rate of 0.5-3%, while metals have a much lower rate of 0.1-1%.