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# UPRVUNL’21 EE: Daily Practices Quiz 25-Aug-2021

`UPRVUNL JE Recruitment 2021:`

A total of 196 vacancies were released by the UPRVUNL Recruitment 2021. The selection process will be based on the written examination which will be divided into two parts – Part I and Part II. Part I will have 150 objective-type questions from the syllabus for the Diploma Engineering in the relevant branch. While Part II will have 50 objective-type questions comprising General Knowledge, General Hindi, and Reasoning.

UPRVUNL-JE ELECTRICAL-2021 QUIZ

Each question carries 1 mark.

Negative marking: 1/4 mark
Total Questions: 06
Time: 08 min.

Q1. In a series resonant circuit, the maximum current is 100 A. What will be the current at upper or lower cutoff frequency?
(a) 50 A
(b) 70.7 A
(c) 100 A
(d) 141.4 A

Q2. Which of the following lamp does not suffer from stroboscopic effect?
(a) Mercury vapour lamp
(b) Sodium vapour lamp
(c) Incandescent lamp
(d) Fluorescent lamp

(a) Resistance
(b) Inductive reactance
(c) Capacitive reactance
(d) Impedance

Q4. The form factor of sinusoidal alternating current is ….
(a) 1
(b) 0
(c) 1.11
(d) 1.41

Q5. The angle of a series RLC circuit is leading if ………?
(a) X_L=0
(b) R=0
(c) X_C>X_L
(d) X_C<X_L

Q6. Which motor has the poorest speed control?
(a) Differentially compound motor
(b) Cumulatively compound motor
(c) Shunt motor
(d) Series motor

SOLUTIONS

S1. Ans.(b)
Sol. For half power frequency, I=I_m/√2=100/√2=70.7 A

S2. Ans.(c)
Sol. Incandescent and Halogen light don’t have stroboscopic effect.

S3. Ans.(d)

S4. Ans.(c)
Sol. FF=I_RMS/1_AVG
FF= (0.707 I_m)/(0.693 I_M )
= 1.11

S5. Ans.(c)
Sol. If X_C>X_L , then capacitive nature is dominating and pf will be leading.

S6. Ans.(d)
Sol. speed control is very poor in series motor.
Series motor used for laboratory purposes.

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