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Sun Vacuum Formers Maintenance Engineer Interview Questions and Answers

Updated 5 Feb 2024

Q1. Tell me the whole process and working of a three axis robots.

Ans.

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 combining movements along these three axes, the robot can ...read more

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Q2. How can we convert a DC supply into AC supply?

Ans.

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.

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Q3. Draw the electrical circuit to control barrel heater through SSR/contactor?

Ans.

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/contactor.

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Q4. What is an injection molding machine?

Ans.

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 injection process.

  • The control unit manages the entire process...read more

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Q5. Tell me the types of pumps!

Ans.

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 include diaphragm pumps, gear pumps, and peristaltic pumps.

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Q6. Draw a complete injection molding cycle.

Ans.

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.

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Q7. What is back pressure?

Ans.

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, back pressure can affect the performance and efficiency of t...read more

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