 Engineering Jobs   »   ELECTRICAL GATE QUIZ

# GATE’22 EE: Daily Practices Quiz 11-Aug-2021

Each question carries 2 marks
Negative marking: 2/3 mark

Total Questions: 05
Total marks: 10
Time: 12 min.

Q1. The unity feedback system shown in the figure has: (c) Steady-state position error K/10 units

Q2. The magnitudes of the open–circuit and short–circuit input impedance of a transmission line are 100 Ω and 25 Ω respectively. The characteristic impedance of the line is.
(a) 25 Ω
(b) 50 Ω
(c) 75 Ω
(d)100 Ω

Q3. The number FF in hexadecimal system has equivalence in decimal system to
(a) 256
(b) 255
(c) 240
(d) 239

Q4. A three-phase 440V, 6 poles, 50Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field w.r.t rotor magnetic field and speed of rotor with respect to stator magnetic field are
(a) Zero, -50 rpm
(b) Zero, 955 rpm
(c) 1000 rpm, -50 rpm
(d) 1000 rpm, 955 rpm

Q5. For a single phase, two winding transformers, the supply frequency and voltage are both increased by 10%. The percentage changes in the hysteresis loss and eddy current loss, respectively, are
(a) – 10 and 21
(b) 21 and 10
(c) – 21 and 10
(d) 10 and 21

SOLUTIONS
S1. Ans.(a)
Sol. G(s)=K/s(s+10) ;H(s)=1
∵position error constant=k_p=lim┬(s→0)⁡〖G(s)H(s)=(lim⁡)┬(s→0) 〗 K/s(s+10) ×1=ꝏ

S2. Ans.(b)
Sol. Z_0=√(Z_OC×Z_SC )=√(100×25)=50 Ω.

S3. Ans.(b)
Sol. (FF)_16=15×16^1+15×16^0=240+15=255.

S4. Ans.(a)
Sol. N_S=(120 f)/P=(120*50)/6=1000 rpm
Rotor speed=N_s-sN_S=950 rpm
Stator magnetic field speed=N_S=1000 rpm
Rotor magnetic field speed=N_S=1000 rpm
So, the relative speed between stator magnetic field and rotor magnetic field=1000-1000=zero
Rotor speed w.r.t stator magnetic field=950-1000=-50 rpm

S5. Ans.(d)
Sol. for a single-phase transformer, both V and f are increased by 10%. Hence, the ratio of (V/f) is constant.
∴W_h α f and W_e α f^2
So, hysteresis loss will be increased by 10 % and eddy current loss will be increased by (1.21-1) =21%.

Sharing is caring!

×

Thank You, Your details have been submitted we will get back to 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

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

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

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 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

+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?