P1A Test

Energy is measured in:
1. Joules
2. Celsius
3. Coulombs
4. Amps
A thermogram is:
1. a diagram of an industrial boiler;
2. a posh word for an electricity bill;
3. a picture that shows areas that are hot or cold;
4. a digital thermometer.
Pay back time is:
1. The time taken between meter readings;
2. The time taken for the cost of insulation to be recovered;
3. The time spent “on hold” by a customer telephoning the energy company call-centre to complain about bad service;
4. The amount of time an employee has to work in order to pay for their energy bills.
Electricity is sold in units called:
1. Joules;
2. Kilowatts;
3. Kilowatts per hour;
4. Kilowatt-hours.
Radiators in a room transfer the heat to the room by:
1. Conduction;
2. Convection;
3. Radiation;
4. None of these.
The input power of an electric fire is 3000 W. The output is 2700 W. The percentage efficiency is:
1. 0.9 %;
2. 11 %;
3. 90 %;
4. 110 %
Which one of these is NOT used to fill the space between two panes of glass in a double glazing unit?
1. Air
2. Argon
3. Vacuum
4. Water.
Insulating materials work because:
1. Air is a good conductor of heat.
2. Air is a bad conductor of heat.
3. They are solid, so stop heat getting through.
4. They reflect heat.
Which one of these statements correctly describes the heat transfer process of convection?
1. Heat is transferred by atoms in a solid colliding with their neighbours.
2. Heat is transferred by a fluid becoming less dense and rising.
3. Heat is transferred as electromagnetic radiation.
4. This is the only way of transferring heat in a vacuum.
Which one of these statements is correctly describes the heat transfer process of conduction?
1. Heat is transferred by atoms in a solid colliding with their neighbours.
2. Heat is transferred by a fluid becoming less dense and rising.
3. Heat is transferred as electromagnetic radiation.
4. This is the only way of transferring heat in a vacuum.
Which one of these statements is correctly describes the heat transfer process of radiation?
1. Heat is transferred by atoms in a solid colliding with their neighbours.
2. Heat is transferred by a fluid becoming less dense and rising.
3. Heat is transferred as electromagnetic radiation.
4. This way of transferring heat cannot happen in a vacuum.
Which one of these is the most expensive way of getting electrical energy?
1. A wind up clock-work mechanism that drives a small generator.
2. A solar cell.
3. Mains electrcity from a plug
4. A battery
A fuse protects the components in a circuit by:
1. Breaking when the current gets too high
2. Breaking when the resistance gets too high
3. Breaking when the voltage gets too high
4. Breaking when the current gets too low
Electricity costs 10 p per unit. A girl has a shower using a 7.5 kW electric shower. She is in there for 20 minutes. How much does it cost?
1. 10 p
2. 25 p
3. 75 p
4. £15
The network of transmission lines for electrical power is called:
1. The Pylons
2. The National Debt.
3. The National Grid
4. None of these
Which one of these does NOT result in an electric current (assuming there is an outside circuit)?
1. A magnet moving past a wire?
2. A magnet being pushed into a coil of wire.
3. A magnet being pulled out of a coil of wire.
4. A magnet lying stationary in a coil of wire
The current in the mains is called alteranting current at 50 Hz. This means that:
1. The current changes direction 100 times every second.
2. The current changes direction 25 times a second.
3. The current changes direction 50 times a second.
4. The current does not change direction at all. It remains at a constant value.
A battery gives out:
1. AC
2. DC
3. H & C
4. WC
You can find the power of an electrical appliance most easily by:
1. Looking for a plate on the back of the appliance.
2. Looking it up in the instruction book.
3. Ringing up the manufacturer.
4. Looking it up on the internet.
In which one of these parts of a power-station is heat energy turned into kinetic energy?
1. The boiler
2. The turbine
3. The condenser
4. The generator
A step-up transformer is:
1. a transformer where a low voltage is turned into a high voltage.
2. a transformer where a high voltage is turned into a low voltage.
3. a transformer used by a tradesman to power 110 V power tools, on which he can stand to reach higher up a wall.
4. an exercise done in PE to measure physical fitness, carried out to loud and thumping "music".
Which one of these power stations does NOT use a renewable energy source?
1. Wind farm
2. Hydro-electric
3. Tidal Power
4. Nuclear Power.
Which one of these power stations releases NO carbon dioxide or other pollutant gases?
1. Nuclear
2. Coal
3. Gas
4. Biomass
Some people say that we should generate all our energy needs from wind farms. Others say we should not. Which one is the BEST reason for not relying totally on wind power?
1. Wind turbines can be put anywhere.
2. Some people think they are unsightly.
3. They are useless on a calm day, or if the wind is too strong.
4. They wear out after about twenty years.
Which one of these is the odd one out, and what is the correct reason?

Electric motor, generator, dynamo
1. Dynamo, because it's only found on a bicycle.
2. Dynamo, because both the others can only run off the Mains supply.
3. Generator, because it's the only one that converts kinetic energy into electrical energy.
4. Electric motor, because it's the only one that converts electrical energy into kinetic energy.

P1A Test

Quiz