UPPSC LECTURER ELECTRICAL QUIZ, UPPSC Polytechnic Lecturer 2021 |_00.1
Engineering Jobs   »   Electrical Engineering quizs   »   UPPSC POLYTECHNIC LECTURER RECRUITMENT 2021, UPPSC...

UPPSC-LECTURER’21 EE: Daily Practices Quiz 10-Dec-2021

UPPSC polytechnic lecturer  2021

UPPSC Technical Lecturer Eligibility Criteria 2021. Uttar Pradesh Public Service Commission has released the official notification for the recruitment of PrincipalLecturerLibrarian, and Workshop Superintendent. The Online application has been started on 15th September 2021 and the last date to apply online is 15th October 2021. The recruitment is for a total of 1370 UPPSC Polytechnic Lecturer Vacancies.

Exam Date: 22/12/2021

UPPSC polytechnic lecturer QUIZ: EE

UPPSC-LECTURER’21 EE: Daily Practices Quiz 10-Dec-2021

Each question carries 3 marks.
Negative marking: 1 mark each or 1/3rd
Total Questions: 06
Time: 08 min.

Q1. Which of the following happens in Kando system?
(a) Three-phase A.C. is converted into D.C.
(b) Single phase A.C. is converted into D.C.
(c) Single phase supply is converted into three phase system
(d) None of the above

Q2. Generally short circuit fault in a transformer is protected by:
(a) MHO relay
(b) Impedance relay
(c) Reactance relay
(d) Merz price protection

Q3. If holding current of a thyristor is 2 mA then latching current should be
(a) 0.01 A
(b) 0.002 A
(c) 0.004 A
(d) 0.009 A

Q4. For the equation, s^3-4s^2+s+6=0 the number of roots in the left half of s-plane will be
(a) Zero
(b) One
(c) Two
(d) Three

Q5. Schering bridge is used to measure
(a) Dielectric loss
(b) The inductance
(c) Low resistance
(d) Mutual Inductance

Q6. The maximum efficiency of a Full-wave rectifier is …………………
(a) 40.6 %
(b) 81.2 %
(c) 50 %
(d) 25 %

SOLUTIONS

S1. Ans.(c)
Sol. Kando System:
In this system, single-phase 16-kV, 50 Hz supply from the sub-station is picked up by the locomotive through the single overhead contact wire. It is then converted into 3-phase ac supply at the same frequency by means of phase converter equipment carried on the locomotives. This 3-phase supply is then fed to the 3-phase induction motors.

S2. Ans.(d)
Sol. Merz price differential protection is used to protect the transformer from internal short circuit, Internal ground faults and inter turn shorts. Transformer is a static device. Merz price differential protection is nothing but a percentage differential protection Which works under the principle of circulating current scheme.

S3. Ans.(c)
Sol. given that holding current= 2 mA=0.002 A
And we know that, the value of latching current is approximately 2 to 3 times to that of holding current.

S4. Ans.(b)
Sol. s^3-4s^2+s+6=0

by R-H criterion:

1 1
-4 6
 
6  

s^0 6
Here there is two sign changes( s^3 to s^2 and s^2 to s^1).
So, number of roots in RHS=2
∴Number of roots in LHS=3-2=1.

S5. Ans.(a)
Sol. Schering bridge is used to measure dielectric loss. It is an AC bridge circuit that is used for measuring the insulating properties of electrical cables and equipment. It has the advantage that the balance equation is independent of frequency.
Maxwell bridge is used to measure the value of unknown inductance.
Heaviside bridge is used to measured mutual inductance in terms of a known self-inductance.
Kelvin bridge is used to measure the value of low resistance.

S6. Ans.(b)
Sol.

Rectifier Max. Efficiency
HWR 40.6 %
FWR 81.2 %

Sharing is caring!

×

Download success!

Thanks for downloading the guide. For similar guides, free study material, quizzes, videos and job alerts you can download the Adda247 app from play store.

Thank You, Your details have been submitted we will get back to you.
Was this page helpful?

Leave a comment

Your email address will not be published. Required fields are marked *

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Login

OR

Forgot Password?

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Sign Up

OR
Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Forgot Password

Enter the email address associated with your account, and we'll email you an OTP to verify it's you.


Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Enter OTP

Please enter the OTP sent to
/6


Did not recive OTP?

Resend in 60s

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Change Password



Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Almost there

Please enter your phone no. to proceed
+91

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Enter OTP

Please enter the OTP sent to Edit Number


Did not recive OTP?

Resend 60

By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?

By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?