UPPSC-LECTURER’21 EE: Daily Practices Quiz 11-NOV-2021

UPPSC polytechnic lecturer eligibility  2021

UPPSC Technical Lecturer Eligibility Criteria 2021. Uttar Pradesh Public Service Commission has released the official notification for the recruitment of Principal, Lecturer, Librarian, 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.

UPPSC polytechnic lecturer QUIZ: EE

UPPSC-LECTURER’21 EE: Daily Practices Quiz 11-NOV-2021

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

Q2. There are……………. cells in 4-variable K-map.
(a) 12
(b) 16
(c) 18
(d) None of the above

Q3. The transistor behaves as a closed switch in ……. region.
(a) Saturation
(b) Active
(c) Inverted mode
(d) Cut off.

Q4. Rectification efficiency of a full wave rectifier without filter is nearly equals to:
(a) 51%
(b) 61%
(c) 71%
(d) 81%

Q5. Two incandescent light bulbs of 50 W and 60 W rating are connected in series across the mains, then
(a) The bulb together consumes 55 W
(b) The bulb together consumes 110 W
(c) The 50 W bulb glows brighter
(d) The 60 W bulb glows brighter

Q6. An induction motor when started on load, it does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be
(a) Locking
(b) Plugging
(c) Crawling
(d) Cogging

SOLUTIONS

S5. Ans.(c)
Sol. As we know, P=V^2/R
In this the rated voltage of both bulbs are fixed.
∴, P α 1/R⇒R α 1/P
So, lower rating bulb glows brighter i.e., 50 W bulb.
NOTE:
For parallel connection, higher rating bulb glows brighter.
For series connection, PT=(P1 P2)/(P1+P2 )

S6. Ans.(c)
Sol. Running stably at low speed around 1/7th of normal motor speed is known as crawling.

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