Foreman & Supervisor Questions
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Foreman & Supervisor Questions - sample questions with answers
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1. Which cell is used as a standard cell?
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Answer: Mercury-Cadmium Cell (Weston cell)
The Mercury-Cadmium Cell (Weston cell) is used as a standard cell due to its stable electromotive force.
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2. Among consumer categories, which plant provides the highest load factor?
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Answer: Continuous process plants
Continuous process plants provide the highest load factor because their power demand remains relatively constant.
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3. What does a load curve primarily represent graphically?
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Answer: Load versus time
A load curve is a graphical plot of load versus time.
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4. In electrical measurement, what type of instrument is a potentiometer?
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Answer: Comparison instrument
A potentiometer is a comparison instrument as it measures an unknown EMF by comparing it with a known value.
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5. What type of transformer is a Tesla coil actually?
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Answer: High frequency resonant transformer
A Tesla coil is a high frequency resonant transformer.
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6. Which type of lamp is commonly used in cinema projectors?
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Answer: Carbon arc lamps
Carbon arc lamps are commonly used in cinema projectors due to their high light intensity.
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7. What is the velocity of light waves?
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Answer: 3 x 10^10 cm/s
Light waves travel at a velocity of 3 x 10^10 cm/s.
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8. In which quadrants are the V-I characteristics of a diode located?
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Answer: 1st and 3rd
The V-I characteristics of a diode are located in the 1st and 3rd quadrants.
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9. Which property must an ideal power diode possess?
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Answer: Large reverse breakdown voltage
An ideal power diode must have a large reverse breakdown voltage to withstand high reverse voltage.
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10. What is the nature of electricity produced in the armature of a DC generator?
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Answer: AC
The electricity produced in the armature of a DC generator is AC.
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11. Which turbine is most suitable for high head and low discharge conditions?
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Answer: Pelton turbine
Pelton turbines are most effective in locations with high head and low water discharge.
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12. On which principle do generators operate to produce EMF?
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Answer: Both dynamically and statically induced EMF
Generators operate on the principle of both dynamically and statically induced EMF.
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13. What is the primary objective of a Pumped Storage Plant?
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Answer: To improve plant capacity factor and load factor
Pumped storage plants are used to improve the plant capacity factor and load factor.
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14. If a wire is stretched to double its length, how does its resistance change?
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Answer: Resistance becomes 4 times (4r)
When length is doubled and area is halved, the resistance increases by 4 times.
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15. Which factor determines the resistivity of a wire?
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Answer: Material it is made of
Resistivity is an intrinsic property of the material and depends on the material it is made of.
This chapter has 75 questions. Practise them all with timing, answers and explanations.