Engine Category > EO2-Characteristics of Electrical Systems and Equipment

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“Видеотел — Engine Category > EO2-Characteristics of Electrical Systems and Equipment” contains 88 questions across 1 collection.

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In a three-phase system why is a resistor fitted in series with the earth detection lights?

One correct answer

• 1) To limit the earth current.
• 2) To protect the earth lights.
• 3) To provide an easier path for the earth current.✓ Correct answer
• 4) To lower the voltage at the earth lights.

This drawing shows the structure of a .........

One correct answer

• 1) FET transistor.
• 2) diode.
• 3) bipolar transistor.✓ Correct answer
• 4) light activated SRC.

Which of these materials can be used to insulate magnetic flux ?

One correct answer

• 1) Ceramic.
• 2) Rubber.
• 3) None of these.✓ Correct answer
• 4) Porcelain.

How can an Ammeter measure a variety of current values?

One correct answer

• 1) By connecting a shunt in series.
• 2) By connecting a shunt in parallel.✓ Correct answer
• 3) By connecting a capacitor in series.
• 4) By connecting a capacitor in parallel.

An electrical heater is marked 220 V, 4400 W. What is the resistance of the heater?

One correct answer

• 1) 220 Ohm
• 2) 11 Ohm✓ Correct answer
• 3) 22 Ohm
• 4) 110 Ohm

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