General Knowledge Practice Question and Answer

Q:

Capacity when connecting capacitors to series?

1227 1

  • 1
    neither increases nor decreases
    Correct
    Wrong
  • 2
    increases
    Correct
    Wrong
  • 3
    decreases
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 2. "increases"
Explanation :

A capacitor stores energy in the form of an electrostatic field between its plates. Increasing the size of the plates increases the capacitance because there is more room for the electrons to escape.

Q:

What is the coupling of primary and secondary coils in a transformer?

1271 0

  • 1
    Electrical
    Correct
    Wrong
  • 2
    Mechanical
    Correct
    Wrong
  • 3
    Magnetic
    Correct
    Wrong
  • 4
    All these
    Correct
    Wrong
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Answer : 3. "Magnetic"
Explanation :

The secondary coil is also generating a magnetic field that is growing and shrinking just like the field in the primary coil. This coupling of magnetic energy between these two coils is called mutual induction.

Q:

Most commonly used motor in motor generator sets of high capacity?

1747 0

  • 1
    Cage Model Induction Motor
    Correct
    Wrong
  • 2
    synchronous motor
    Correct
    Wrong
  • 3
    DC Compounder Motor
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 2. "synchronous motor"
Explanation :

The tendency nowadays is to use synduction or synchronous motors. The synduction motor resembles an induction motor but runs at synchronous speed.

Q:

Are fan boxes installed in roofs?

1494 0

  • 1
    Casing-keeping wiring
    Correct
    Wrong
  • 2
    in cleat wiring
    Correct
    Wrong
  • 3
    in conduit wiring
    Correct
    Wrong
  • 4
    Wiring
    Correct
    Wrong
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Answer : 3. "in conduit wiring"
Explanation :

Most building codes require ceiling fans to be mounted on special fan-rated boxes made of metal or strong plastic with deep-threaded holes for the mounting screws. The box must be mounted firmly by attaching it directly to a framing member or using a fan-rated brace.

Q:

Capacitors are fitted to increase the power coefficient.

2891 0

  • 1
    parallel to the supply
    Correct
    Wrong
  • 2
    By putting resistance to supply
    Correct
    Wrong
  • 3
    In the supply chain
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 1. "parallel to the supply"
Explanation :

In an AC circuit, magnetic reversal due to phase difference between current and voltage occurs 50 or 60 times per second. A capacitor helps to improve the power factor by relieving the supply line of the reactive power.

Q:

Solder wire is made?

1135 0

  • 1
    Land and tin
    Correct
    Wrong
  • 2
    Zinc and copper
    Correct
    Wrong
  • 3
    copper and lead
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 1. "Land and tin"
Explanation :

Solder is a fusible metal alloy used to create a permanent bond between metal workpieces. It is made up of 60% tin and 40% lead.


Q:

Tungsten resistance to temperature rise?

2021 0

  • 1
    decreases
    Correct
    Wrong
  • 2
    increases
    Correct
    Wrong
  • 3
    there is no change
    Correct
    Wrong
  • 4
    All these
    Correct
    Wrong
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Answer : 2. "increases"
Explanation :

At high temperatures, the tungsten filament gets hot and atoms in the filament vibrate more. The electrons in the current now collide more with the atoms & more energy is needed to push the current through the filament. Hence, the resistance of tungsten increases with temperature.

Q:

In which country is the multinational military exercise 'Peace Prayas IV' being organised?

554 0

  • 1
    India
    Correct
    Wrong
  • 2
    Nepal
    Correct
    Wrong
  • 3
    Bangladesh
    Correct
    Wrong
  • 4
    Pakistan
    Correct
    Wrong
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Answer : 2. "Nepal"
Explanation :

Multinational military exercise 'Shanti Prayas IV' is being organized in Nepal. 19 countries including India, Bangladesh and Pakistan are participating in this exercise. Prime Minister Pushpa Kamal Dahal "Prachanda" inaugurated this two-week long military exercise.

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