१. Which motor is preferred for cement industry?
- Squirrel cage motor
- Synchronous motor
- Universal motor
- DC series motor
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२. What is the maximum permissible voltage drop that can be sustained while starting an electrical rotating machine?
- 15 – 20 % of the rated voltage
- 20 – 25 % of the rated voltage
- 5 – 10 % of the rated voltage
- 0 – 5 % of the rated voltage
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३. AC power in a load can be controlled by using
- two SCR’s in parallel opposition
- two SCR’s in series
- three SCR’s in series
- four SCR’s in series
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४. An SCR is made up of silicon because
- silicon has large leakage current than germanium
- silicon has small leakage current than germanium
- silicon has small leakage voltage than germanium
- silicon has large leakage voltage than germanium
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५. Range of ammeter can be increased by…….. with galvanometer.
- by connecting lower resistance in series
- by connecting high resistance in series
- by connecting lower resistance in parallel
- by connecting higher resistance in parallel
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