Electronic GK Questions
Refrigerators have a relay?
(A) Magnetic type
(B) by simple switch
(C) Non-magnetic
(D) All of the above
Correct Answer : A
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.
Are secondary electrical devices?
(A) Depleting torques
(B) Containing torque
(C) Damping torque
(D) All these
Correct Answer : D
Which of the following hitting methods has the highest power factor?
(A) heating resistance
(B) induction heating
(C) Arc heating
(D) Dielectric heating
Correct Answer : A
Explanation :
The correct answer is Resistance Heating. Resistance heating is based on the I2R effect and is highly resistive in nature that's why it has the maximum power factor. Electric resistance heating is defined as “the heat produced by passing an electric current through a material that preferably has high resistance”.
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) .
Showing page 5 of 5
enhttps://www.examsbook.com/electronic-gk-questions/555electronic-gk-questionsAbout 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