NHPC JE Recruitment 2021, NHPC-JE ELECTRICAL QUIZ, |_00.1
Engineering Jobs   »   Electrical Engineering quizs   »   NHPC JE Recruitment 2021, NHPC-JE ELECTRICAL...

NHPC-JE’21 EE: Daily Practices Quiz 17-Sep-2021

NHPC JE Recruitment 2021

National Hydroelectric Power Corporation (NHPC) has released the recruitment notification for engagement of following posts such as Senior Medical Officer, Assistant Rajbhasha Officer, Junior Engineer & Sr. Accountant posts. NHPC expects application from High Performing, Dynamic & Achievement-Oriented Professionals candidates to fill up these 173 vacancies.

NHPC-JE’21 EE: Daily Practices Quiz

NHPC-JE’21 EE: Daily Practices Quiz 17-Sep-2021

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

Q1. In series resonant circuit the impedance of the circuit is
(a) Minimum
(b) Maximum
(c) Zero
(d) None of these

Q2. Proximity effect is more in case of
(a) Overhead line
(b) Power cable
(c) DC transmission
(d) None of the above

Q3. XLPE cable is one type of H.T. cable. The full form of XLPE is:
(a) Cross lead polyethylene cable
(b) Cross linked paper ethylene cable
(c) Cross line paper ethylene cable
(d) Cross linked polyethylene cable

Q4. Which of the following is not a reaction turbine?
(a) Francis turbine
(b) Kaplan turbine
(c) Pelton wheel turbine
(d) Propeller turbine

Q5. The power input to a 3-phase induction motor is 50 KW. If the stator losses are 800 W, then copper losses of rotor phase for 0.5 % slip will be:
(a) 492 W
(b) 246 W
(c) 200 W
(d) 100 W

Q6. The value of current (I) in the following figure is

NHPC JE Recruitment 2021, NHPC-JE ELECTRICAL QUIZ, |_40.1
(a) 3A
(b) 4A
(c) 5A
(d) 6A

SOLUTIONS

S1. Ans.(a)
Sol. At the resonant frequency, the net reactance is zero because X_L=X_C. The circuit impedance Z becomes minimum and is equal to the resistance R. “Since the impedance is minimum, the current will be maximum”.

S2. Ans.(b)
Sol. The alternating magnetic flux produced in the conductor due to the current flowing through the neighbouring conductor gives rise to the circulating current which increases the resistance of the conductor. This phenomenon is called the proximity effect.
The proximity is more in the case of power cable and underground line where the distance between the conductor is small.

S3. Ans.(d)
Sol. XLPE: cross linked polyethylene cable.

S4. Ans.(c)
Sol.
Francis, Kaplan and propeller turbines are reaction turbines.
Pelton wheel turbine is an impulse turbine.

S5. Ans.(b)
Sol. Air gap power or rotor input power (P_g )=stator input power-stator loss
∴P_g=50000-800=49200 W
Rotor copper loss (P_cu )=sP_g=0.005×49200=246 W

S6. Ans.(a)
Sol. According to Kirchhoff’s 1st law (KCL)
Σi=0
ie,3+4+I+(-8)+(-2)=0
⇒I =10-7
=3A

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?