MCQ Questions

Question No. 1

Make the following unit conversions: a) 50 °F into K b) 30 °C into °F c) 1.7 acres into m² d) 85 hp into watts e) 5 000 J into kWh f) 212 hp into kW

Answer :

a) 50 °F → K

b) 30 °C → °F

c) 1.7 acres → m²

d) 85 hp → W

e) 5 000 J → kWh

f) 212 hp → kW

Question No. 2

The Benin distribution company charges their Residential 2 customers electricity at the rate of N18.46 per kilowatt-hour. A resident in this district has a meter reading of 99.96 kWh. How much must the homeowner pay for electricity for this month?

Answer :

Question No. 3

A resident in the Yola district, where the electricity tariff is N19.44/kWh for Residential 2 customers, buys a prepaid voucher for N4 500. Taking into account that VAT at 5% is deducted from this amount, calculate:

Answer :

a) How many kilowatt-hours of electricity he would get for this amount

b) How many days he could use this voucher for, if he uses an average of 8 kWh per day

Question No. 4

Table 6.1 shows the crude oil price, domestic production and crude oil export (mbd) for the month of March 2015 in Nigeria. Calculate:

Answer :

a) How many litres of oil were produced for the month?

b) How much did Nigeria earn in March for oil exportation?

c) How many m³ of crude oil were used locally in Nigeria?

Question No. 5

The melting point of pure 24 K gold is 1 945 °F. This temperature is equivalent to:

Answer :

3 533 °C

2 218 K

1 063 °C

1 672 K

Question No. 6

The size of a farm is 1 000 acres. What is this area in hectares? (Hint: 1 hectare = 10 000 m2.)

Answer :

0.1 ha

4.047 ha

404.7 ha

4 047 ha

Question No. 7

A diesel generator for home usage is rated at 40 hp. What is the power rating of this generator in kilowatts?

Answer :

29 840 kW

29.84 kW

40 kW

298.4 kW

Question No. 8

The following statements are made about the kilowatt-hour unit. i) The kilowatt-hour measures electrical power. ii) The kilowatt-hour is equivalent to 3.6 × 10^6 J. iii) The kilowatt-hour measures time. Which of the above statement(s) is/are correct?

Answer :

(i) only

(ii) only

(i) and (ii) only

all of (i), (ii) and (iii)

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