Electronic GK Questions
Curd contains mainly______acid.
(A) Benzoic
(B) Fumaric
(C) Lactic
(D) Malic
Correct Answer : C
Which of the following acids is used in car batteries?
(A) Nitric acid
(B) Hydrochloric acid
(C) Sulphuric acid
(D) Hydrofloric acid
Correct Answer : C
Explanation :
sulphuric acid is used in car batteries.
Tungsten resistance to temperature rise?
(A) decreases
(B) increases
(C) there is no change
(D) All these
Correct Answer : B
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.
Are fan boxes installed in roofs?
(A) Casing-keeping wiring
(B) in cleat wiring
(C) in conduit wiring
(D) Wiring
Correct Answer : C
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.
Solder wire is made?
(A) Land and tin
(B) Zinc and copper
(C) copper and lead
(D) None of these
Correct Answer : A
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.
Capacitors are fitted to increase the power coefficient.
(A) parallel to the supply
(B) By putting resistance to supply
(C) In the supply chain
(D) None of these
Correct Answer : A
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.
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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