Dictionaries Questions and Answers
Python Programming - Dictionaries Questions with Answers focus on storing data as key-value pairs efficiently. These Python Dictionaries Questions are often asked in Wipro, SSC, and TCS exams to assess understanding of associative arrays
Dictionaries
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41 questions
21. A direct voltage is applied to a peak diode voltmeter in which scale is calibrated to read rms voltage of a sine wave. If the meter reading is 36 V rms, the value of the applied direct voltage is
- 25 V
- 36 V
- 51 V
- 72 V.
22. A power station has annual load factor of 50% and capacity factor of 40%. If the maximum demand is 15 MW, the reserve capacity of the plant is
- 1250 kw
- 2500 kw
- 3750 kw
- 4750 kw.
23. Which of the following will not contribute to low power-factor ?
- Partially loaded induction motors
- Replacement of fluorescent lamps with incandescent lamps
- Use of rectifiers instead of synchronous motor-generator sets for dc power supply
- Increased installation of electronic equipments, air- conditioning units, etc.
24. Which of the following may not be the effect of low plant operating power factor ?
- Over loaded transformers
- Reduced voltage level
- Improved illumination from lighting
- Over loaded cables.
25. Identify the incorrect relation
- power factor = KW / kVA
- kW = kVA x power factor
- kVA x kW = power factor
- kVA = kW / power factor.
26. The power factor of a system on a 460 V, 3 phase, 60 Hz, in which the ammeter indicates 100 amp and the watt meter reads 62 kW will be
- 0.95
- 0.78
- 0.65
- 0.55.
27. When a power plant is not able to meet the demand of consumers it will resort to
- penalizing high load consumers by increasing the charges for electricity
- power factor improvement at the generators
- efficient plant operation
- load shedding.
28. Load shedding is possible through
- voltage reduction
- frequency reduction
- switching off the loads
- any of the above.
29. Which of the following power plants can generate power at unpredictable or uncontrollable times ?
- Wind power plant
- Tidal power plant
- Solar power plant
- Any of the above.
30. Direct conversion of heat into electrical power is possible through
- thermionic converter
- fuel cell
- batteries
- all of the above.