Science General Knowledge Questions and Answers
What effect of power is used in the filament lamp?
(A) Thermal effect
(B) magnetic effect
(C) Gas ionization
(D) Chemical effects
Correct Answer : A
Explanation :
The heating effect of current is used in a bulb because the current heats up the filament. It causes light to be emitted as a result of the filament burning.
The study deals with interrelationships between the life forms and the environment is?
(A) Zoology
(B) Astrology
(C) Ecology
(D) Entomology
Correct Answer : C
Explanation :
Ecology is the study of interrelationships between organisms and with their environment. It is also known as environmental science.
The release of water vapour from the leaves is:
(A) Evaporation
(B) Transpiration
(C) Frost
(D) Dew
Correct Answer : B
Explanation :
Evapotranspiration: What it is and why it's usefulOverall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves is known as transpiration.
Which of the following rotor will have the highest noise?
(A) Shaded pole motor
(B) Universal Motor
(C) capacitor motor
(D) All of the above will be equal
Correct Answer : C
Explanation :
Cylindrical rotors are used in high-speed alternators having speed between 1500 rpm to 3000 rpm and salient pole rotors are used in low-speed devices, from 100 rpm to 1500 rpm. Cylindrical type rotors are used in turbo-alternators and these are made up of solid steel forging to get high mechanical stress.
Which of these diseases is also known as 'encephalitis'?
(A) Japanese encephalitis
(B) Tetanus
(C) Dengue
(D) Rabies
Correct Answer : A
Explanation :
Encephalitis is inflammation of the brain. Myelitis refers to inflammation of the spinal cord. When both the brain and the spinal cord are involved, the condition is called encephalomyelitis. Infections and other disorders affecting the brain and spinal cord can activate the immune system, which leads to inflammation.
Which of the gas is not known as green house gas?
(A) Methane
(B) Hydrogen
(C) Nitrous oxide
(D) Carbon dioxide
Correct Answer : B
Explanation :
Whereas oxygen, nitrogen, and argon are not examples of greenhouse gases.
The gases used in different types of welding would include
(A) oxygen and hydrogen
(B) oxygen, hydrogen, acetylene and nitrogen
(C) oxygen, acetylene and argon
(D) oxygen and acetylene
Correct Answer : D
Explanation :
Acetylene is the only fuel gas suitable for gas welding because of its favourable flame characteristics of both high temperature and high propagation rates. Other fuel gases, such as propane, propylene or natural gas, produce insufficient heat input for welding but are used for cutting, torch brazing and soldering.
The average salinity of sea water is
(A) 2%
(B) 3%
(C) 3.5%
(D) 2.5%
Correct Answer : C
Explanation :
The average salinity of sea water is 3.5% or 35 parts per thousand. In other words, for every 1 litre of sea water there is 35 grams of dissolved salts (NaCl) .
Reading of a barometer going down is an indication of
(A) rainfall
(B) snow
(C) storm
(D) intense heat
Correct Answer : A
Explanation :
Low pressure – when reading of the barometer is lower than inHg, this is considered as low air pressure, which is associated with warm air and rainstorm. So, clearly, a falling barometer indicates bad weather is ahead.
In the following that is not related to gases low.
(A) Boyle’s law
(B) Avogadro’s law
(C) Len'z law
(D) Charles’s law
Correct Answer : C
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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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