Spm Autocomp Maintenance Electrician Interview Questions and Answers

An injection molding machine is a manufacturing tool used to produce plastic parts by injecting molten material into a mold.

• It consists of a hopper, an injection unit, a clamping unit, and a control unit.

• The hopper is used to store the plastic material that will be melted and injected into the mold.

• The injection unit melts the plastic and injects it into the mold.

• The clamping unit holds the mold in place during the inj...read more

Draw the electrical circuit to control barrel heater through SSR/contactor.

• Start by identifying the power source and the barrel heater.

• Connect the power source to the input terminals of the SSR/contactor.

• Connect the output terminals of the SSR/contactor to the barrel heater.

• Include appropriate fuses and circuit breakers for safety.

• Consider using a control signal (e.g., from a temperature controller) to trigger the SSR/

Back pressure is the resistance or force exerted against the flow of a fluid or gas in a system.

• Back pressure occurs when there is a restriction or blockage in a system that hinders the flow of a fluid or gas.

• It can be caused by factors such as narrow pipes, clogged filters, or closed valves.

• Back pressure can lead to decreased efficiency, increased energy consumption, and potential damage to the system.

• In an engine, ba...read more

The injection molding cycle involves several steps to produce a molded part.

• Clamping: The mold is closed and clamped tightly.

• Injection: Molten plastic is injected into the mold cavity.

• Cooling: The plastic solidifies and cools inside the mold.

• Ejection: The mold opens and the molded part is ejected.

• Cycling: The mold closes again for the next cycle.

A three-axis robot is a robotic system that operates in three dimensions, allowing it to move and manipulate objects in a wide range of directions.

• A three-axis robot typically consists of three linear axes, each capable of independent movement along a specific axis (X, Y, and Z).

• The X-axis controls horizontal movement, the Y-axis controls vertical movement, and the Z-axis controls depth or forward/backward movement.

• By ...read more

DC supply can be converted into AC supply using an inverter.

• Inverter is an electronic device that converts DC to AC.

• It uses a switching circuit to alternate the polarity of DC voltage.

• The output waveform can be modified using filters and transformers.

• Examples of inverters include square wave, modified sine wave, and pure sine wave inverters.

There are various types of pumps used in engineering, including centrifugal pumps, reciprocating pumps, and rotary pumps.

• Centrifugal pumps are commonly used for transferring fluids by converting rotational energy into kinetic energy.

• Reciprocating pumps use a piston or plunger to create pressure and move fluid.

• Rotary pumps operate by trapping fluid between rotating components and the pump casing.

• Other types of pumps inc...read more