This question was previously asked in

LPSC (ISRO) Technician B (Electronic Mechanic): Previous Year Paper (Held on 4 March 2018)

Option 1 : 11.768 units

Subject Test 1: Electrical Basics

3257

20 Questions
80 Marks
30 Mins

**Concept:**

1 HP = 746 Watts

1 unit = 1 kilowatt-hour, i.e. when an electrical appliance consumes 1 kilowatt of power for one hour.

**Analysis:**

0.5 HP = 373 Watts

So, 0.5 HP for 8 hours = 373 × 8 = 2984 Watt-hour which is equal to 2984/1000= 2.984 units.

1 motor consumes = 2.984 units in 8 hours

4 motors consumes = 2.984 × 4 = **11.936 units** in 8 hours.

The closest option is 1.