Week 2 Term 3 Quiz

What does 'threshing' do to rice?

• remove the husk

• separate the grain from the straw

• remove the dead grains

• clean the rice

What force does a fan use in the de-husking machine?

• sheer force

• friction force

• impact force

• centrifugal force

What forces do the rollers use in the de-husking machine?

• centrifugal force

• impact force

• friction and sheer force

• jedi force

Which percentage of the rice grain is the 'husk'?

• 20%

• 70%

• 5%

• 18%

Answer explanation

How does electricity work in a circuit?

• electrons travel across atoms

• the battery heats up

• magnets turn on

• protons and neutrons pass through the atom

Answer explanation

What is a 'watt' measurement in electricity?

• The electrical power a device uses

• The power in a battery

• The electricity in the wire.

• The resistance in the wire.

What does 'winnowing' do to the rice?

• Separate the grain from the chaff

• Separate the grain from the stalk

• Separate the husk from the grain

• Make the rice white

Answer explanation

Rice chaff

What does a 'resistor' do to a circuit?

• slow down electricty

• speed up electricity

• turn off the circuit

• make the light bulb glow

Which appliance uses the most 'watts'?

• 85" flat screen TV

• fridge and freezer

• shower water heater

• air-conditioner.

Answer explanation

A shower water heater uses 4500 watts as it needs to get very hot quickly.

He has (a)   to the latest strain of COVID and he will be sick for a week. (word of the week)