PSPCL-JE’21 EE: Daily Practices Quiz 02-NOV-2021

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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 02-NOV-2021

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

Q1. The current drawn by a dc series motor increased from 10 A to 12 A. what is the percentage increase in torque? (Neglect saturation)
(a) 20
(b) 44
(c) 50
(d) 64

Q2. The location of ground faults in underground cables can be found by:
(a) Megger
(b) Murray loop test
(c) Electro-dynamometer
(d) Ohm-meter

Q3. Induction type energy meter measures energy in _______:
(a) Joules
(b) kW
(c) kWh
(d) W

Q4. Which of the following relation is correct, where β = current gain?
(a) α=β/(1+β)
(b) β=α/(1-α)
(c) β=α/(1+α)
(d) both a and b

Q5. In active region transistor works as –
(a) buffer
(b) switch
(c) amplifier
(d) All of these

Q6. ________ is done just above Bedding’s surface.
(a) Insulation
(b) Serving
(c) Armouring
(d) Metallic Sheathing

SOLUTIONS

S1. Ans.(b)
Sol. In dc series motor, torque(T) ⍺ I^2 (Before saturation)
∴% increase in torque = ((12)^2-(10)^2)/(10)^2 ×100=44 %

S2. Ans.(b)
Sol. With the help of Murray loop test, we can easily locate the earth fault and short circuit fault in the underground cable.

S3. Ans.(c)
Sol. Induction type works on AC. Due to series and shunt magnet eddy current induced on ‘Al’ disc, which interacts and provides rotation.

S4. Ans. (d)
Sol. α =I_c/I_E ⇒I_C=αI_E
β=I_C/I_B
⇒ β=(αI_E)/I_B
⇒ β=(αI_E)/(I_E-I_C )=(αI_E)/(I_E-αI_E )
⇒ β=α/(1-α)

S5. Ans.(c)
Sol. When transistor is in active region and input is applied, results in a large output which shows the property of amplifier.

S6. Ans.(c)
Sol. Armoring: It provides mechanical protection from various stresses the cable may get exposed to during its installation and operational life. It’s usually a steel tape wound around the Bedding layer.