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Electrical Appliances 2010 Question Paper For CBSE Class XII Exams

1. (a) Explain the construction and working of a shaded pole motor. (6 Marks)

OR

Explain the procedure of components testing of a universal motor.(6 Marks)

(b) Give the constructional details of the motor used in a ceiling fan. How will you reverse the direction of rotation of a ceiling fan? (4 Marks)

2. (a) Explain the construction and working principle of a mixer. Give its few uses. (5 Marks)

(b) Describe in brief the working of a manual Voltage Stabiliser with its circuit diagram. (5 Marks)

3. (a) Explain the procedure of overhauling a washing machine. (4 Marks)

(b) Explain the installation procedure of a desert cooler. Why is ear thing of a desert cooler required?(4 Marks)

OR

Describe in detail the procedure involved in the testing of a defective desert cooler.(4 Marks)

4. (a) Describe in detail the procedure involved in the repair of a blower type room Heater.(3 Marks)

OR

Give the constructional details of a bowl type room heater. (3 Marks)

(b) Explain the common faults in a hair dryer. How will you rectify them? (3 Marks)

5. (a) Explain the construction and working principle of a vacuum cleaner. (3 Marks)

   (b) Describe the common faults in an electric hand drill. How will you rectify Them? (3 Marks)