CBSE Class 12 Question Paper 2022 Electrical Technology

SET-4
Series %BAB% àíZ-nÌ H$moS>
Q.P. Code 343
amob Z§. narjmWu àíZ-nÌ H$moS> H$mo CÎma-nwpñVH$m Ho$
Roll No. _wI-n¥ð >na Adí` {bIo§ &
Candidates must write the Q.P. Code on
the title page of the answer-book.

H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _o§ _w{ÐV n¥ð> 7 h¢ &
àíZ-nÌ _| Xm{hZo hmW H$s Amoa {XE JE àíZ-nÌ H$moS H$mo narjmWu CÎma-nwpñVH$m Ho$ _wI-n¥>ð> na
{bI| &
H¥$n`m Om±M H$a b| {H$ Bg àíZ-nÌ _| >25 àíZ h¢ &
H¥$n`m àíZ H$m CÎma {bIZm ewê$ H$aZo go nhbo, CÎma-nwpñVH$m _| àíZ H$m H«$_m§H$ Adí`
{bI| &
Bg àíZ-nÌ 15 {_ZQ >H$m g_` {X`m J`m h¡ & àíZ-
10.15 ~Oo {H$`m OmEJm & 10.15 ~Oo go 10.30 ~Oo VH$ N>mÌ Ho$db àíZ-
Bg Ad{Y Ho$ Xm¡amZ do CÎma-nwpñVH$m na H$moB© CÎma Zht {bI|Jo &
Please check that this question paper contains 7 printed pages.
Q.P. Code given on the right hand side of the question paper should be written
on the title page of the answer-book by the candidate.
Please check that this question paper contains 25 questions.
Please write down the serial number of the question in the
answer-book before attempting it.
15 minute time has been allotted to read this question paper. The question
paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the
students will read the question paper only and will not write any answer on
the answer-book during this period.

{dÚwV² àm¡Úmo{JH$s
ELECTRICAL TECHNOLOGY
1
:1 : 30
2
1
Time allowed : 1 hours Maximum Marks : 30
2

343 Page 1 P.T.O.

:

(i)

(ii)

(iii) 5 6
1 4
5 6

(iv) 17 16
7 13
14 18
19 22

(v) 8 3
23 25

(vi)

(vii) /

IÊS H$
(amoµOJma H$m¡eb) (3+2=5 A§H$)

4 3 3 1=3
1. {H$Ýht Xmo H$maH$m| Ho$ Zm_ {b{IE Omo h_mao ì`{º$Ëd H$mo AmH$ma XoVo h¢ & 1
2. ? 1
3. h[aV AW©ì`dñWm Ho$ H$moB© Xmo KQ>H$ {b{IE & 1
4. ? 1

2 1 1 2=2
5. à^mdr EMC ? 2
6. J«rZhmCg CËgO©Z Ho$ joÌ _| h[aV Zm¡H$[a`m| H$s ^y{_H$m ñnï> H$s{OE & 2

343 Page 2

General Instructions :
(i) Please read the instructions carefully.
(ii) This question paper is divided into three sections, viz. Section A,
Section B and Section C.
(iii) Section A is of 5 marks and has 6 questions on Employability Skills.
(a) Questions number 1 to 4 are one mark questions. Attempt any
three questions.
(b) Questions number 5 and 6 are two marks questions. Attempt any
one question.
(iv) Section B is of 17 marks and has 16 questions on Subject Specific Skills.
(a) Questions number 7 to 13 are one mark questions. Attempt any
five questions.
(b) Questions number 14 to 18 are two marks questions. Attempt any
three questions.
(c) Questions number 19 to 22 are three marks questions. Attempt any
two questions.
(v) Section C is of 8 marks and has 3 Competency-Based Questions.
Questions number 23 to 25 are four marks questions. Attempt any
two questions.
(vi) Do as per the instructions given in the respective sections.
(vii) Marks allotted are mentioned against each section/question.

SECTION A
(Employability Skills) (3+2=5 marks)

Answer any 3 questions out of the given 4 questions. 3 1=3
1. Name any two factors which shape our personality. 1
2. What do you mean by Entrepreneur ? 1
3. Write any two components of green economy. 1
4. What should we do to control pollution ? 1

Answer any 1 question out of the given 2 questions. 1 2=2
5. What do students do in an effective EMC class ? 2
6. Explain the role of green jobs in the field of greenhouse emissions. 2

343 Page 3 P.T.O.

IÊS I
({df` {d{eï> H$m¡eb) (5+6+6=17 A§H$)

7 5 5 1=5

7. {OVZr Y«wdm| H$s g§»`m A{YH$ hmoJr, CVZr hr _moQ>a H$s J{V ______ hmoJr & (A{YH$/H$_) 1

8. EH$ H§$nmC§S> _moQ>a _| _______ joÌ hmoVo h¢ & (Xmo/Mma) 1

9. _oJa H$m EH$ n¡_mZm h¡ Omo _______ h¡ & (`y{Z\$m°_©/Zm°Z-`y{Z\$m°_©) 1

10. ______ hmoVm h¡ O~ H$a§Q> eara go hmoH$a JwµOaVm h¡ & ({~Obr H$m PQ>H$m /Hw$N> ^r Zht) 1

11. pñßbQ> \o$µO _moQ>a H$s aqZJ dmB§qS>J H$mo _______ _| aIm J`m h¡ & (amoQ>a/ñQ>oQ>a) 1

12. W_m}ñQ>¡Q> {Z`§ÌU H$m Cn`moJ _______ _| {H$`m OmVm h¡ & (Q>o~b hrQ>a/Am°Q>mo_¡ >H$
JrµOa) 1

13. _______ m{Q>ªJ Q>m°H$© hmoVm h¡ & (`y{Zdg©b _moQ>a/H¡$no{gQ>a ñQ>mQ>© _moQ>a) 1

5 3 3 2=6

14. W«r-\o$µO AC _moQ>a Mmby ? 2

15. {S>{OQ>b Eo_rQ>a H$m AmaoI ~ZmBE & 2

16. àUmbr H$m dU©Z H$s{OE & 2

17. H¥${Ì_ ídgZ Ho$ {bE à`wº$ eoµ\$a H$s {d{Y Ho$ ~mao _| g§jon _| dU©Z H$s{OE & 2

18. W_m}ñQ>¡Q> H$s H$m`©àUmbr Am¡a Cn`moJ {b{IE & 2

4 2 2 3=6

19. W«r-\o$µO VmËn`© h¡ ? BgHo$ \$m`Xo {b{IE & 3

20. qgJb \ 3

21. AmaoI Ho$ gmW ê$_ Hy$ba H$s H$m`©àUmbr H$s ì`m»`m H$s{OE & 3

22. AmaoI Ho$ gmW EH$ Iam~ B_e©Z am°S> H$s narjU à{H«$`m H$mo g_PmBE & 3

343 Page 4

SECTION B
(Subject Specific Skills) (5+6+6=17 marks)

Answer any 5 questions out of the given 7 questions. 5 1=5
7. Greater the number of poles _________ will be the speed of a motor.
(more/less) 1
8. A compound motor has _________ fields. (two/four) 1
9. Megger has a scale which is _________. (uniform/non-uniform) 1
10. _________ happens when the current passes through the body. (Electric
shock/Nothing) 1
11. The running winding of a split-phase motor is placed in _________.
(rotor/stator) 1
12. Thermostat control is used in _________. (table heater/automatic electric
geyser) 1
13. _________ has high starting torque. (Universal motor/Capacitor start
motor) 1

Answer any 3 questions out of the given 5 questions. 3 2=6
14. Why is a starter necessary to start a three-phase AC motor ? 2
15. Draw a diagram of a digital ammeter. 2
16. Describe the construction and working of an electric mixer. 2
17. method used for artificial respiration. 2
18. Write the working and use of a thermostat. 2

Answer any 2 questions out of the given 4 questions. 2 3=6
19. What do you mean by a three-phase induction motor ? Write its
advantages. 3
20. Define single phase induction motor. Write its types. 3
21. Explain the working of a room cooler with its diagram. 3
22. Explain the testing process of a defective immersion rod with its diagram. 3

343 Page 5 P.T.O.

IÊS J
(`mo½`Vm-AmYm[aV àíZ) (2 4=8 A§H$)

3 2

23. AmaoI H$s ghm`Vm go qgJb-\o$µO
H$s{OE & 4

24. EH$ AmaoI H$s ghm`Vm go, EH$ Bbop µOa Ho$ {Z_m©U Am¡a H$m`©àUmbr H$s ì`m»`m
H$s{OE & 4

25. H¡$no{gQ>a ñQ>mQ>© _moQ>a H$s H$m`©àUmbr g_PmBE & BgH$s gmdYm{Z`m± ~VmBE VWm W«r-\o$µO
_moQ>a na qgJb-\o$µO _moQ>a Ho$ \$m`Xo Am¡a ZwH$gmZ {b{IE & 4

343 Page 6

SECTION C
(Competency-Based Questions) (2 4=8 marks)

Answer any 2 questions out of the given 3 questions.

23. With the help of a diagram, explain the working of a single-phase
induction type energy meter. 4

24. With the help of a diagram, explain the construction and working of an
electric geyser. 4

25. Explain the working of a capacitor start motor. Write its precautions and
give the advantages and disadvantages of a single-phase motor over a
three-phase motor. 4

343 Page 7 P.T.O.