Environment GK Questions and Answers
The electron gun is the main part of?
(A) Cathode Ray Isoloscope
(B) Transistor tester
(C) Single Generator
(D) All of the above
Correct Answer : A
Explanation :
The most common use of electron guns is in cathode-ray tubes, which were widely used in computer and television monitors before the advent of flat screen displays. Most color cathode-ray tubes incorporate three electron guns, each one producing a different stream of electrons.
Refrigerators have a relay?
(A) Magnetic type
(B) by simple switch
(C) Non-magnetic
(D) All of the above
Correct Answer : A
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.
Are secondary electrical devices?
(A) Depleting torques
(B) Containing torque
(C) Damping torque
(D) All these
Correct Answer : D
In the nitrogen cycle, soil nitrates are converted into free nitrogen by whom?
(A) nitrifying bacteria
(B) denitrifying bacteria
(C) ammonifying bacteria
(D) None of these
Correct Answer : B
The relationship between the water fern Azola and the cyanobacterium Annabena is: -
(A) symbiotic
(B) mutual
(C) Survival
(D) Proto-support
Correct Answer : A
Showing page 4 of 6
enhttps://www.examsbook.com/environment-gk-questions-and-answers/464environment-gk-questions-and-answersAbout author
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/.
Read more articles