Himachal Pradesh Takniki Shiksha Board | 3rd
Electrical Technology
Browse ET 3rd question papers for exam preparation and revision.
📚 Syllabus - ET (Diploma Mechanical Engineering 3rd)
1. General Introduction:- (05 hrs)
1.1 Types of elect. Engg. materials; conducting semi-conducting &
insulating materials and their application.
1.2 Applications for electricity and Advantages of Elect. Energy over
other types of energy.
1.3 Concept of voltage current power and energy and their units
2. DC Circuits:- (05 hrs)
2.1 Resistance factors affecting the resistance of conducting metals
resistivity and their units.
2.2 Resistances in series & parallel.
2.3 Ohm’s Law,
2.4 Faraday’s Laws,
2.5 Len’s Law.
3. Principles of AC Circuits:- (12 hrs)
3.1 Concept of voltage generation advantages of three phase generation
over single phase generation. Three phase star & delta connections
voltage & current relationship (no derivation)
3.2 Def of cycle, frequency time period instantaneous value rms & max
value of sinusoidal wave (relation between rms & max value), form
factor & peak factor.
3.3 Concept of phase & phase difference.
3.4 Concept of resistance, inductance, capacitance and impedance in
ac circuits.
3.5 Power factor(concept of lead, lag & unity p.f.),its importance and
improvement.
3.6 Measurement of three phase power using two voltmeter method.
3.7 Determination of true power, current & p. f. in simple ac series
circuits (simple problems)
4. DC Machines:- (08 hrs)
1.1 Construction & principle of working of dc motor & generator.
1.2 Flaming’s Rules
1.3 Starting of dc motors ( three-point starter) & speed control.
1.4 Reversing the direction of rotation of dc motors.
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5. AC Machines:- (10 hrs)
5.1 Types of AC motors and their applications
5.2 Construction of three phase induction motors, comparison of sq.
cage and slip-ring induction motors
5.3 Working principle of single phase & three-phase induction motors.
5.4 Reversing the direction of rotation of single phase & three phase
induction motors.
5.5 Starting of three phase induction motors using star/delta & DOI,
starters, starting single phase split phase motors.
6. Transformer:- (06 hrs)
6.1 Construction & working principle.
6.2 Transformation ratio, emf equation, losses & efficiency.
6.3 Auto transformer,
6.4 Cooling of transformers.
7. Basic Electronics:- (10 hrs)
7.1 Basic idea of semiconductor products, diode, Zener diode,
Transistor, SCR and their applications
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About This Question Paper Collection
Browse ET 3rd question papers for Diploma Mechanical Engineering students at Himachal Pradesh Takniki Shiksha Board. This page helps students review question patterns, prepare for exams, and understand how previous papers are structured.
Select a paper below to open year-wise question papers, solutions, or available answer content where listed on BRpaper.
How Students Can Use These Papers
Practicing with previous year papers for Electrical Technology gives Himachal Pradesh Takniki Shiksha Board students a clear sense of question difficulty, marks distribution, and topics that come up repeatedly.
Pair them with your current syllabus and class notes so revision stays aligned with what your university expects this year, while the papers themselves guide your exam-time strategy.
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