General Science Quiz and Answers
An aquatic plant was introduced to the US to remove pollution in Indian aquatic bodies as a troublesome weed. what is its name?
(A) hawthorn
(B) Egiolps
(C) hyacinth
(D) Pistia
Correct Answer : B
Explanation :
So the correct answer is 'Eichhornia crassipes' An aquatic plant introduced from America to check pollution turned out to be a troublesome weed in Indian water bodies.
From which source is the list of countries emitting carbon dioxide based on carbon dioxide emissions?
(A) Burning of fossil fuels
(B) Cement Industry
(C) Both of the above
(D) None of these
Correct Answer : C
Explanation :
This is a list of sovereign states and territories by carbon dioxide emissions due to certain forms of human activity, based on the EDGAR database created by European Commission and Netherlands Environmental Assessment Agency.
Whose register is the montrix record?
(A) Dangerous foreign species
(B) endangered wild species
(C) Aquatic places at risk under anthropogenic activities
(D) None of these
Correct Answer : C
Explanation :
The Montreux Record is a register of wetland sites on the List of Wetlands of International Importance where changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution or other human interference. It is maintained as part of the Ramsar List.
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.
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.
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.
Most commonly used motor in motor generator sets of high capacity?
(A) Cage Model Induction Motor
(B) synchronous motor
(C) DC Compounder Motor
(D) None of the above
Correct Answer : B
Explanation :
The tendency nowadays is to use synduction or synchronous motors. The synduction motor resembles an induction motor but runs at synchronous speed.
What is the coupling of primary and secondary coils in a transformer?
(A) Electrical
(B) Mechanical
(C) Magnetic
(D) All these
Correct Answer : C
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.
Capacity when connecting capacitors to series?
(A) neither increases nor decreases
(B) increases
(C) decreases
(D) None of the above
Correct Answer : B
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.
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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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