BSE Construction Science Principles

Front

How do you calculate:

Area?

Back

Area = length × width

Front

How do you calculate:

Volume?

Back

Volume = length × width × depth

Front

What is the unit of measurement for force?

Back

The unit of measurement for force is the newton (N).

Front

What occurs when two dissimilar metals are in contact with each other through the presence of an electrolyte?

Back

Galvanic corrosion occurs when two dissimilar metals are in contact with each other through the presence of an electrolyte.

Front

Find the amount a 6 m copper pipe will expand due to a temperature rise of 35°C.

Back

To find the amount a 6m copper pipe will expand due to a temperature rise of 35°C: 6 × 35 × 0.000016 = 0.003 36 m or 3.36mm

Front

If a machine with a 250 kW output has an input power of 300 kW, what is the machine efficiency?

Back

To calculate the machine efficiency for a machine with a 250kW output and a 300kW input:

% efficiency = output power / input power × 100 = 250 / 300 × 100 = 83.3%

Front

List three non-renewable fuel sources?

Back

Three non-renewable fuel sources are:

• gas

• oil

• coal.

Front

What is the SI unit for power?

Back

The SI unit for power is watts (W)

Front

Calculate the current flowing through a 230 V circuit with a resistance of 115 #.

Back

To calculate the current flowing through a 230V circuit with a resistance of 115Ω:

𝐼 = 𝑉 / 𝑅

= 230 / 115

= 2A

Front

Calculate the total resistance for the circuit shown below:

Back

Total resistance = 10 + 15 + 25 = 50Ω