Multiple Choice Questions on Electrical Engineering and Practice Test 10
Last updated on October 31st, 2014 at 02:50 pm
There are 16 questions to be attended in 20 minutes. The questions are on Electrical Engineering. Read the study material before making an attempt so that you build your confidence in the subject. This is the tenth of the series of 10 questions paper that will appear before the RRB examination for SSE and JE to be held in Dec.
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There are 16 questions to be attended in 20 minutes. The questions are on Electrical Engineering. Read the study material before making an attempt so that you build your confidence in the subject. This is the first of the series of 10 questions paper that will appear before the RRB examination for SSE and JE to be held in Dec.
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The Answer Key:
Sr No Question Answer Remarks 1 Diamagnetic materials are those which repels when magnetic field is applied and this material is a diamagnetic material Hg 2 Kirchhoff’s current law states that algebraic sum of current at node is zero 3 In an AC system, the reactive power keeps moving from source to load at rated frequency 4 Three resistances of three ohms each are connected to form a triangle. What is the resistance between two corners 2 It will form a parallel circuit of 6 ohms and 3 ohms. 5 Time constant of a capacitor is defined as the time taken during which the voltage across the capacitor rises to what percentage of its final value 0.632 6 During charging and discharging process of a nickel iron cell water is neither formed nor absorbed 7 In a AC circuit, resistive and total impedance are 10 and 20 ohms respectively. What is the phase angle difference between the voltage and current? 60 degree Cosɸ= R/Z; where R= 10 ohms and Z= 20 ohms than Cosɸ=1/2 means phase angle is 60 degree 8 Maximum starting torque is achieved when rotor resistance is equal rotor reactance 9 Overhead traction voltage of Electric traction is single Phase 25kV Current collection at 3 phase is very difficult and 25 kv is standardised for the purpose of suitability of clearances. 10 Voltage regulation in a distribution network is of the order of Plus/Minus 10 % 11 In 25 kV electric traction, the return current flows through on of the two rails One of the rail is used to return the current to traction substation. The other rail is used for track circuiting and if both the rails are used than different frequency is used for the purpose. 12 Following process does not uses dielectric heating infrared heating 13 The material used for high temperature resistive heating is silicone carbide 14 an auto-transformer is used where variable voltage is required generally for experiments Auto-transformer is having one primary winding and secondary moves on the primary to tap the required voltage. 15 Differential protection works on the principle of assess the difference of current in two related circuit and difference is assessed to trip the circuit breaker Mostly used for the protection of transformer wherein difference between primary and secondary is assessed and circuit breaker is tripped. This is done after taking into consideration the transformer ratio. 16 Transducer is a device which converts any form of energy into another form of energy
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Question 1 of 16
1. Question
an auto-transformer is used where
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Question 2 of 16
2. Question
Diamagnetic materials are those which repels when magnetic field is applied and this material is a diamagnetic material
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Question 3 of 16
3. Question
Kirchhoff’s current law states that
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Question 4 of 16
4. Question
In an AC system, the reactive power
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Question 5 of 16
5. Question
Three resistances of three ohms each are connected to form a triangle. What is the resistance between two corners
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Question 6 of 16
6. Question
Time constant of a capacitor is defined as the time taken during which the voltage across the capacitor rises to what percentage of its final value
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Question 7 of 16
7. Question
During charging and discharging process of a nickel iron cell
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Question 8 of 16
8. Question
In a AC circuit, resistive and total impedance are 10 and 20 ohms respectively. What is the phase angle difference between the voltage and current?
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Question 9 of 16
9. Question
Maximum starting torque is achieved when rotor resistance is equal
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Question 10 of 16
10. Question
Overhead traction voltage of Electric traction is
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Question 11 of 16
11. Question
Voltage regulation in a distribution network is of the order of
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Question 12 of 16
12. Question
In 25 kV electric traction, the return current flows through
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Question 13 of 16
13. Question
Following process does not uses dielectric heating
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Question 14 of 16
14. Question
The material used for high temperature resistive heating is
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Question 15 of 16
15. Question
Differential protection works on the principle of
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Question 16 of 16
16. Question
Transducer is a device which converts
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Very supportable
sir, can you please post some mock tests on basics of civil and mechanical engineering,that would be very helpful.Thanks!
good questions
Very nicely explained
Objective question for 3phase loco in loco inspector examination