Question 1 of 17

1. What is the name of this part of an electric iron?

Mica insulation

Asbestos sheet

Sole plate

Pressure plate

Question 1 of 17

Question 2 of 17

2. What is the function of the neutral path in AC supply systems for appliances?

Maintains load current constant

Maintains voltage level constant

Provides current return path

Reduces voltage drop in wiring

Question 2 of 17

Question 3 of 17

3. What is the fault if a food mixer runs intermittently?

Defective commutator

Armature coil open

Field winding partially short

Worn out brushes

Question 3 of 17

Question 4 of 17

4. Which motor type is used in wet grinders?

Universal motor

Capacitor start capacitor run motor

Repulsion motor

Capacitor start induction run motor

Question 4 of 17

Question 5 of 17

5. Which material is used to make heating elements?

Nichrome

Silver

Aluminium

Copper

Question 5 of 17

Question 6 of 17

6. What is the purpose of protection grooves in a heater base plate?

Protect element from damage

Place vessels firmly

Retain heating element firmly

Radiate heat properly

Question 6 of 17

Question 7 of 17

7. Which formula calculates heat generated according to Joule's law?

Heat = IRT/J cal

Heat = I²RT/J cal

Heat = IR²T/J cal

Heat = (IR)²T/J cal

Question 7 of 17

Question 8 of 17

8. What is the function of the stirrer motor in a microwave oven?

Exhausts hot air outside

Draws cooling air inside

Revolves and reflects electromagnetic energy

Spreads heat uniformly

Question 8 of 17

Question 9 of 17

9. What is the magnetron tube filament voltage used in microwave ovens?

3.0 V AC

1.5 V AC

3.2 V AC

2.0 V AC

Question 9 of 17

Question 10 of 17

10. What is the purpose of the sole plate in an electric kettle?

Keeps the element in close contact with container

Acts as a balancing weight

Protects the kettle base from damage

Acts as an insulator for the element

Question 10 of 17

Question 11 of 17

11. Calculate heat generated by a 1000W, 240V heater working for 5 minutes:

71.6 kcal

72.1 kcal

71.0 kcal

70.5 kcal

Question 11 of 17

Question 12 of 17

12. What is the function of the magnetron tube in a microwave oven?

Converts microwave to electrical energy

Amplifies microwave signal

Changes polarity every half cycle

Oscillates to produce cooking frequency

Question 12 of 17

Question 13 of 17

13. What is the defect in a single-phase pump motor if it runs at slow speed?

Open starting winding

Defective capacitor

Short in running winding

Short in starting winding

Question 13 of 17

Question 14 of 17

14. Which position gives maximum output from a heater?

Position 3

Position 2

Position 1

Position 4

Question 14 of 17

Question 15 of 17

15. What is the purpose of the U-bend marked 'X' in a geyser?

Reduces outlet pipe pressure

Prevents air locking in tank

Prevents draining of water

Avoids scale formation

Question 15 of 17

Question 16 of 17

16. Which AC single-phase motor is used in food mixers?

Shaded pole motor

Split phase motor

Universal motor

Repulsion motor

Question 16 of 17

Question 17 of 17

17. What is this circuit called?

Electronic voltage multiplier

Electronic voltage stabilizer

Electronic fan regulator

Electronic triggering circuit of SCR

Question 17 of 17