BSE Construction Science

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

• 0.001 m

• 0.002 m

• 0.00336 m

• 0.004 m

What is the SI unit for power?

• Joules (J)

• Watts (W)

• Volts (V)

• Amperes (A)

How do you calculate: Area?

• Area = length + width

• Area = length - width

• Area = length × width

• Area = length ÷ width

Explain what Climate Change is and what it refers to?

• Climate change refers to long-term shifts in temperatures and weather patterns, which can be natural or manmade.

• Climate change is a temporary change in weather conditions due to seasonal variations.

• Climate change only refers to the increase in temperature caused by human activities.

• Climate change is solely the result of volcanic eruptions and does not involve human influence.

How do you calculate:

Volume?

• Volume = length + width + depth

• Volume = length × width × depth

• Volume = length - width - depth

• Volume = length ÷ width ÷ depth

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

• 80%

• 83.3%

• 75%

• 90%

Describe the methods of heat transfer?

• Convection, Conduction, Radiation

• Evaporation, Condensation, Sublimation

• Conduction, Insulation, Reflection

• Convection, Radiation, Insulation

Explain the three Characteristics of air?

• Temperature – how hot or cold the air is

• Pressure – the force exerted by the air

• Density – the mass per unit volume

• Humidity – the degree of moisture in the air.

Calculate the voltage in a circulating pump with a resistance of 44 # and a current of 5 A?

• 220 V

• 110 V

• 180 V

• 250 V

What is an echo?

• An echo is a sound caused by the reflection of sound waves from a surface back to the listener.

• An echo is a type of sound that is produced by a musical instrument.

• An echo is a sound that is amplified by electronic devices.

• An echo is a sound that travels in a straight line without any reflection.