Goa Board Class 10 Question Paper Mar 2019 Domestic Wiring Pre Vocational

2019 IV 09 0930 Seat No.

Time : 2 Hours DOMESTIC WIRING
Pre-Vocational (Electrical Group)

Subject Code

S 0 4 1

Total No. Of Questions : 4 (Printed Pages : 3) Maximum Marks : 40

INSTRUCTION : (i) Answer each question on a fresh page.

(ii) Write the serial number of the questions and sub-questions

clearly.

(iii) Figures to the right indicate full marks.

(iv) All questions are compulsory.

(v) Draw neat labelled diagrams wherever necessary.

1. (A) Answer the following in one word/sentence : 1×2=2

(i) Name the instrument used to measure power.

(ii) What is an artificial magnet ?

(B) Answer the following in brief : 3×2=6

(i) Explain the construction of Energy meter. Where is Energy

meter used ?

(ii) With a neat labelled circuit diagram explain Megger.

(C) Answer the following in short : 2×1=2

(i) Mention any two advantages and two disadvantages of

Distribution system of Domestic wiring.

S-041 1 P.T.O.

2. (A) Define the following : 1×2=2

(i) Self-induction.

(ii) Kirchhoff’s Voltage law.

(B) Answer the following in brief : 3×2=6

(i) What are permanent magnets ? Mention any two properties and

two uses of magnets.

(ii) Explain how electric supply comes in our houses from street poles

and goes to different consuming points.

(C) Answer the following in short : 2×1=2

Draw a neat labelled diagram of ‘Tree system’ of electrical wiring.

3. (A) Answer in one or two words : 1×2=2

(i) Name the system of wiring where fault location is difficult.

(ii) Name the tool which is used to find the gauge of winding wires.

(B) Answer the following in short : 2×2=4

(i) Draw a neat labelled diagram of Mallet and explain.

(ii) With a neat labelled diagram explain Ball Peen hammer.

(C) Answer the following in detail : 4×1=4

(i) Explain the four laws of Resistances.

Or

(ii) State Ohm’s law. Calculate the value of current through

a resistance of 10 ohms, if it is connected across a battery of

1.5 volts.

S-041 2

4. (A) Answer the following questions in brief : 1×2=2

(i) Why flexible stand is provided for the table lamp ?

(ii) What is a series test lamp ?

(B) Answer the following in brief : 2×2=4

(i) Explain the construction of Electric Kettle.

(ii) Explain the construction of Immersion water heater.

(C) Answer the following in detail : 4×1=4

(i) With the help of a neat circuit diagram explain series parallel

testing board.

Or

(ii) With a neat diagram explain the necessity of thermostat in

Automatic electric iron.

S-041 3 P.T.O.