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100+ Free UPMSP Vocational Domestic Electrical Appliances & Repair Practice Questions

Prepare for the Uttar Pradesh UPMSP Intermediate (Class 12) Domestic Electrical Appliances and Repair — Vocational Code 239 exam with instant access — no signup required.

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Key Facts: UPMSP Vocational Domestic Electrical Appliances & Repair Exam

3h 15m

Duration of UPMSP Class 12 Vocational theory examination

UPMSP Official Syllabus

100 Marks

Total paper weightage for Code 239 vocational paper

UP Board Examination Scheme

33%

Minimum passing score required

UPMSP Regulations

100 MCQs

Practice questions in this comprehensive OpenExamPrep bank

OpenExamPrep

Master UPMSP Class 12 Domestic Electrical Appliances & Repair (Code 239) with 100 verified MCQs covering Safety, Earthing, Heating & Motorized Appliances, Refrigeration Electricals, Instruments, and Fault Finding.

Sample UPMSP Vocational Domestic Electrical Appliances & Repair Practice Questions

Try these sample questions to test your UPMSP Vocational Domestic Electrical Appliances & Repair exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the immediate first action to take when a technician witnesses someone receiving an electric shock from a live domestic appliance?
A.Isolate the main electrical supply or unplug the appliance switch immediately
B.Pull the victim away using bare hands
C.Throw water over the victim to cool their skin
D.Apply burn ointment to the victim before touching the switch
Explanation: The primary safety rule during an electric shock emergency is to immediately disconnect the power source by turning off the main circuit breaker or pulling the plug. Never touch the victim directly with bare hands while the circuit is live.
2Which magnitude of AC current passing through the human body is generally considered lethal due to ventricular fibrillation?
A.1 mA to 5 mA
B.10 mA to 20 mA
C.50 mA to 100 mA
D.5 A to 10 A
Explanation: An alternating current of 50 mA to 100 mA (0.05 A to 0.1 A) passing through the chest cavity can disturb the heart's rhythm, triggering fatal ventricular fibrillation.
3Which item of Personal Protective Equipment (PPE) is mandatory when servicing live domestic distribution boards?
A.BIS-certified dielectric rubber gloves and insulating footwear
B.Cotton garden gloves and leather sandals
C.Steel-toed boots with bare hands
D.Nylon fabric gloves and metal-soled shoes
Explanation: Technicians servicing live 230 V AC circuits must wear dielectric rubber gloves rated for the voltage level and shoes with insulating rubber soles to prevent electrical conduction to ground.
4Which fire extinguisher type is appropriate for extinguishing an active electrical fire on a home appliance?
A.Class A water-type extinguisher
B.Carbon Dioxide (CO2) or Dry Chemical Powder (DCP) extinguisher
C.Class B chemical foam extinguisher
D.Wet chemical kitchen extinguisher
Explanation: Electrical fires (Class C / electrical hazard) require non-conductive extinguishing agents such as Carbon Dioxide (CO2) or Dry Chemical Powder (DCP) to smother flames without causing electrocution.
5What is the main safety reason for using a 3-pin plug over a 2-pin plug for metallic-bodied appliances?
A.The third top pin connects the exposed metallic body to the ground conductor for shock protection
B.The third pin increases supply voltage from 110 V to 230 V
C.The third pin converts alternating current to direct current
D.The third pin reduces electricity consumption by 30%
Explanation: The metallic frame of appliances like irons and geysers is connected to the top earth pin. If live wire insulation fails and touches the body, the ground wire safely bypasses current to earth and trips protection.
6If an electric shock victim is freed from current but is unconscious and not breathing, what procedure must be started immediately?
A.Cardiopulmonary Resuscitation (CPR)
B.Splashing water on the victim's face
C.Administering hot beverages
D.Vigorously shaking the victim's extremities
Explanation: Cardiopulmonary Resuscitation (CPR)—alternating 30 chest compressions with 2 rescue breaths—must be started immediately to sustain blood circulation and oxygen supply until medical aid arrives.
7According to Indian Standards (IS 3043), what is the maximum safe touch voltage limit for human contact in normal dry domestic environments?
A.50 V AC
B.12 V AC
C.110 V AC
D.230 V AC
Explanation: In normal dry locations, the safety threshold for AC touch voltage is specified as 50 V RMS. Voltages below 50 V are generally considered non-hazardous to healthy skin under dry conditions.
8An appliance marked with a double-square symbol indicates Class II insulation. What safety feature does this mean?
A.The appliance has reinforced or double insulation and does not require an earth wire connection
B.The appliance must be connected to two separate earth pits
C.The appliance operates only on double voltage (460 V)
D.The appliance contains two internal fuses
Explanation: Class II appliances feature double or reinforced insulation surrounding live parts. Because non-conductive enclosures prevent user contact with metal, an earth ground wire is not required (2-pin plug used).
9Before replacing an internal heating element in a domestic water heater (geyser), what mandatory electrical safety step must be performed?
A.Turn off double-pole isolator switch, remove supply fuse/lock out MCB, and verify zero voltage using a multimeter
B.Turn off only the water inlet valve while keeping electric power switched on
C.Replace the element using rubber-coated pliers while current is live
D.Disconnect only the ground wire while leaving live line connected
Explanation: Lockout/Tagout (LOTO) safety protocol dictates isolating double-pole mains, locking out MCB/removing fuses, and testing for dead circuit (zero voltage) with a calibrated meter before touching internal wiring.
10A person with a wet skin body resistance of 1,000 Ω accidentally touches a 230 V AC live wire. What current flows through the body, and what is the expected physiological impact?
A.230 mA; severe shock, muscular contraction, and potential ventricular fibrillation
B.2.3 mA; minor tingling sensation
C.23 mA; mild pain with full muscle control
D.2.3 A; instant explosion of skin tissue
Explanation: Using Ohm's Law: I = V / R = 230 V / 1000 Ω = 0.23 A = 230 mA. A current of 230 mA far exceeds the 50-100 mA threshold for ventricular fibrillation and severe muscular paralysis.

About the UPMSP Vocational Domestic Electrical Appliances & Repair Exam

The Uttar Pradesh UPMSP Intermediate (Class 12) Domestic Electrical Appliances and Repair (Code 239) examination tests technical knowledge and practical skills required for diagnosing, testing, repairing, and servicing household electrical appliances. Topics cover electrical safety regulations, earthing systems, electric heating devices, single-phase motors, refrigeration controls, electrical measuring tools, and fault diagnosis.

Assessment

Theory examination compulsory for Class 12 Vocational stream students specializing in Domestic Electrical Appliances and Repair (Code 239) in Uttar Pradesh Board. Evaluates safety practices, earthing, heating and motorized appliance servicing, refrigeration control circuits, electrical instruments, and circuit protection.

Time Limit

3 hours 15 minutes (195 minutes)

Passing Score

Minimum 20 of 60 in each written paper, 33% in the 300-mark theory aggregate, and 50% (200 of 400) in the practical examination

Exam Fee

₹600.75 for institutional (regular) Intermediate candidates in the vocational class and ₹806 for private candidates for the 2026 examination. UPMSP charges one registration fee per candidate, not per subject paper. (Uttar Pradesh Madhyamik Shiksha Parishad (UPMSP))

UPMSP Vocational Domestic Electrical Appliances & Repair Exam Content Outline

14%

Electrical Safety & Shock Protection

Safe working practices, electric shock hazards, first-aid shock treatment, Personal Protective Equipment (PPE), and safety regulations.

14%

Grounding/Earthing & Wiring Rules

Pipe and plate earthing methods, BIS wiring rules, earth continuity conductor sizing, neutral vs earth wire, and earthing resistance testing.

16%

Heating Appliances Repair

Electric iron (thermostat, bimetallic strip, soleplate), electric geysers (heating element, thermostat, thermal cutoff, sacrificial anode), room heaters, toasters, and electric kettles.

18%

Motorized Appliances Repair

Ceiling and table fans (capacitor-start motors, speed regulators), mixer/grinders (universal motors, carbon brushes, overload switch), washing machines (pulsator/spin motors, timer switches), and domestic water pumps.

14%

Refrigeration & AC Electrical Circuits

Hermetic compressor electrical terminals (Common, Start, Run), overload protector (OLP), voltage/current relays, starting & running capacitors, thermostat, and defrost circuits.

12%

Electrical Measuring Instruments

Multimeter operation (AC/DC voltage, current, resistance), Megger for insulation resistance testing, Tong tester (clamp meter) for AC current, wattmeter, and single-phase energy meter.

12%

Circuit Protection & Fault Finding

Fuses (rewireable, HRC), Miniature Circuit Breakers (MCB), Earth Leakage Circuit Breakers (ELCB/RCCB), short circuit, open circuit, earth fault diagnostics, and series test lamp testing.

How to Pass the UPMSP Vocational Domestic Electrical Appliances & Repair Exam

What You Need to Know

  • Passing score: Minimum 20 of 60 in each written paper, 33% in the 300-mark theory aggregate, and 50% (200 of 400) in the practical examination
  • Assessment: Theory examination compulsory for Class 12 Vocational stream students specializing in Domestic Electrical Appliances and Repair (Code 239) in Uttar Pradesh Board. Evaluates safety practices, earthing, heating and motorized appliance servicing, refrigeration control circuits, electrical instruments, and circuit protection.
  • Time limit: 3 hours 15 minutes (195 minutes)
  • Exam fee: ₹600.75 for institutional (regular) Intermediate candidates in the vocational class and ₹806 for private candidates for the 2026 examination. UPMSP charges one registration fee per candidate, not per subject paper.

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

UPMSP Vocational Domestic Electrical Appliances & Repair Study Tips from Top Performers

1Master Ohm's Law (V = IR) and Power formulas (P = VI, P = I²R, P = V²/R) for quick numerical problem solving.
2Memorize standard color codes (Live: Red/Brown, Neutral: Black/Blue, Earth: Green/Yellow) and earth resistance limits (< 5 Ω for domestic installations).
3Understand the working of bimetallic thermostats in electric irons and water heaters, including temperature adjustment and contact pin cleaning.
4Learn single-phase motor testing: identifying CSR (Common, Start, Run) terminals on hermetic compressor motors and fan capacitor wiring.
5Practice using measuring instruments: multimeter for continuity/resistance, Megger for insulation resistance (> 1 MΩ requirement), and clamp meter for AC current.
6Differentiate between MCB (overload & short circuit protection) and ELCB/RCCB (earth leakage & shock protection) operation.

Frequently Asked Questions

What is UPMSP Code 239 Domestic Electrical Appliances and Repair?

Code 239 is a vocational stream subject for Class 12 UP Board students focusing on the principles, operation, maintenance, testing, and repair of domestic electrical devices and single-phase circuits.

What key topics are covered in the Code 239 exam?

The exam covers 7 key areas: Electrical safety & shock treatment, earthing & wiring rules, heating appliance repair, motorized appliance repair, refrigeration & AC electrical circuits, measuring instruments, and circuit protection & fault finding.

What is the passing score for UPMSP Intermediate Vocational exams?

Candidates must achieve at least a 33% aggregate mark in the theory examination to pass.

Does the question bank include numerical calculations?

Yes, this 100-question practice set includes electrical calculations involving Ohm's Law, wattage/power rating, fuse rating selection, heating element resistance, and earthing resistance values.

How are practical appliances like fans, mixers, and geysers evaluated?

Questions test internal component identification (thermostats, bimetallic strips, carbon brushes, capacitors, relays), working principles, common failure modes, and troubleshooting procedures.