PSPCL-JE’21 EE: Daily Practices Quiz 01-NOV-2021

PSPCL RECRUITMENT 2021

Punjab State Power Corporation Ltd. (PSPCL), a power generating and distributing company of the Government of Punjab state, has released the notification for recruitment to the post of Clerk, Revenue Accountant, Junior Engineer (Electrical), Assistant Lineman & Assistant Sub Station Attendant Posts.
A total of 75 vacancies have been announced for the recruitment process of JE ELECTRICAL Engineering.

Exam Dates: 10 N0V-21 to 17 Nov-21

PSPCL-JE’21 EE: Daily Quiz

PSPCL-JE’21 EE: Daily Practices Quiz 01-NOV-2021

Each question carries 1 mark.
Negative marking: 1/4 mark
Total Questions: 06
Time: 06 min.

Q1. The phenomenon of electron emission from the surface of a metal by supplying external thermal energy to it is called …………
(a) Field emission
(b) Secondary emission
(c) Photoelectric emission
(d) Thermionic emission

Q2. The primary winding of a 60/12 ampere electric current transformer has 10 turns. How many numbers of turns should be provided on the secondary winding?
(a) 2
(b) 20
(c) 50
(d) 40

Q3. ………is a device that converts A.C power into D.C power.
(a) Transformer
(b) Rectifier
(c) Diode
(d) Resistance

Q4. The process of adding impurity to an intrinsic semiconductor is known as ……
(a) Dropping
(b) Doping
(c) Diluting
(d) Diffusing

Q5. What is the value of charging current in short transmission lines?
(a) Less than medium transmission lines
(b) Equal to medium transmission lines
(c) More than medium transmission lines
(d) More than long transmission lines

Q6. Dummy coils are provided in the generator in order to
(a) Reduce eddy current losses
(b) Amplify voltage
(c) Provide mechanical balance for the rotor
(d) Enhance flux density

SOLUTIONS

S1. Ans.(d)
Sol. Thermionic emission is the emission of electrons from a heated metal (cathode).

S2. Ans.(c)
Sol. N2/N1 =I1/I2
∴N2=I1/I2 ×N1=60/12×10=50

S3. Ans.(b)
Sol. Rectifier.

S4. Ans.(b)
Sol. Doping

S5. Ans.(a)
Sol. Line to Earth capacitance of short transmission line is less than that in medium and long transmission line and is negligible. Because of this the charging current of short transmission line is less than that in medium and long transmission line and is negligible.

S6. Ans.(c)
Sol. Dummy coils are provided in the generator in order to provide mechanical balance to the rotor.

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