WBSETCL JE Recruitment 2022
WBSETCL JE Recruitment 2022: West Bengal State Electricity Transmission Company Limited has released the official notification on 15th December 2021 for 414 vacancies for the posts of Junior Executive, Junior Engineer on the official website @wbsetcl.in. The candidates can apply online for WBSETCL JE Recruitment 2022 till 05th January 2022 through the direct link available in this article for the ease of candidates.
WBSETCL JE QUIZ: EE
WBSETCL-JE’21 EE: Daily Practices Quiz 03-Jan-2022
Each question carries 1 mark.
Negative marking: NO negative marking
Total Questions: 06
Time: 06 min
Q1. Maxwell bridge is used for the measurement of ……………having the Q-factor in the
(a) Inductors, 1 < Q < 10
(b) capacitors, 1 < Q < 100
(c) Inductors, 100 < Q < 1000
(d) Capacitors and inductors, 1 < Q < 100
Q2. Find the coefficient of coupling of two coils having L1=2 H,L2=8 H and M=4 H.
Q3. Which device is used in sub-stations to improve the power factor?
(a) Synchronous reactor
(b) Series inductor
(c) Synchronous condenser
(d) Series capacitor
Q4. Ferranti effect in overhead line is experienced when?
(a) Sending end voltage is more than receiving end voltage
(b) Sending end voltage is less than receiving end voltage
(c) Sending end voltage is equal to receiving end voltage
(d) Voltage at all points in line is equal.
Q5. In a three-phase system, the relation VL=Vph is applicable to a ________.
(a) star-connected without neutral point
(b) star-connected load
(c) single-phase system also
(d) delta-connected load
Q6. A 8-pole lap-wound generator has 400 conductors; the e.m.f. induced per conductor
being 5 V. The generated voltage of the generator is ………
(a) 60 V
(b) 1500 V
(c) 360 V
(d) 250 V
Sol. Bridges used for measurement of inductance:
Anderson bridge (Q<1).
Maxwell bridge (1<Q<10).
Hay bridge (Q>10).
Sol. K=M/√(L1 L2 )=4/√(2×8)=4/4=1.0
Sol. For power factor improvement, synchronous condenser is used.
Synchronous condenser is basically a synchronous motor operating at no-load and leading power factor.
Sol. Ferranti effect in overhead transmission lines is experienced at light load condition in this phenomenon, V_R>V_S ie, receiving end voltage is greater than sending end voltage. To overcome this problem, shunt reactors are used at receiving end of lines.
Sol. For delta connection –
Line voltage (VL )= Phase voltage (Vph)
Line current (IL) = √3× Phase current (Iph )
Sol. No of conductors per parallel path=400/8=50
∴ Eg=50×5=250 V