Videotel questions are grouped by professional topic, including machinery, electrical equipment, fuel and ballast operations. Choose a subject relevant to your preparation.

“Видеотел — Engine Category” contains 2,228 questions across 17 collections.

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Sample questions and answers

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On this commonly used electric pressure transmitter, how will you adjust the range ?

One correct answer

1) With item No. 1.
2) With item No. 2.
3) With item No. 5.
4) With item No. 7.✓ Correct answer

What information would you find on the name plate of any industrial transformer.

The source image is unavailable.

One correct answer

1) Power, current, horsepower, ampereage.
2) Power, voltage, transformation rate, impedance.
3) Polarity marking, kVA, impedance, voltages, maker.
4) kVAR rating, voltage, impedance, BIL rating, polarity.✓ Correct answer

How is an air conditioning compressor normally unloaded?

The source image is unavailable.

One correct answer

1) By holding open the discharge valves.
2) By throttling the suction valves.
3) By holding open the suction valves.✓ Correct answer
4) By throttling the suction valves.

How can you monitor the correct instant for synchronising alternators should your synchronising system (synchronoscope or lamps) be defective ?

The source image is unavailable.

One correct answer

1) By fitting a voltmeter over one phase.✓ Correct answer
2) By fitting lamps over the three phases.
3) By fitting lamps crossed over two phases.
4) By fitting two voltmeters crossed over two phases.

What is the original power that moves the injection needle upwards in the injector and causes the injector to spray fuel under pressure into the cylinder?

The source image is unavailable.

One correct answer

1) The lifting pressure of the pump plunger.
2) The mechanical force of the fuel cam.✓ Correct answer
3) The hydraulic pressure in the fuel line.
4) The balance pressure obtained by the injector spring.

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