Technology In The Home Flashcards
All cookers have…
…a hob, a grill and an oven.
Cookers can be fuelled by…
…gas and/or electricity or by solid fuel.
Features of a Hob include…
…dual rings, halogen rings, induction hob and spilt-level cookers.
Features of a Grill include…
…dual grill.
Features of an Oven include…
…glass panelled external door, removable drop-down door and oven roof, cool touch doors, stay-clean or self-cleaning oven linings.
Electric oven…
…multifunction ovens and auto timer.
Gas oven…
…oven flame-failure device.
Thermostat…
…keeps the oven at the temperature set on the control dial.
Methods of heat transfer in a cooker…
…conduction, radiation and convection.
Conduction…
…heat is transferred along a solid object eg. The hob heats saucepans by conduction.
Radiation…
…heat rays travel in straight lines and heat the first object they hit eg. The grill heats food by radiation.
Convection…
…air (or liquid) is heated and then rises from the surface, and cool air (or liquid) replaces it. This sets up convection currents eg. The oven heats food by convection.
What are microwaves?
Microwave are energy waves attracted to water and fat molecules. They enter the food and make the food molecules viber ate, causing friction. This friction produces heat in the food.
What are the uses of a microwave oven?
- Cooking food quickly.
- Reheating.
- Defrosting.
- Melting.
- Softening.
What cookware is suitable for cooking in a microwave oven?
•Heat-resistant glass, plastic and china dishes.
What cookware is unsuitable for cooking in a microwave oven?
•Metal containers, metal-trimmed dishes, aluminium foil or foil-lined covers.
Advantages of a microwave oven?
- Quick and convenient.
- Healthier.
- Saves washing up.
- Food keeps it colour.
Disadvantages of a microwave oven?
- Unsuitable for large amounts of food.
- Does not brown foods.
- Does not tenderise tough cuts of meat.
- Food may be overcooked or burned easily.
When using a microwave oven…
- Follow instructions given.
- The size, thickness and quantity influence the cooking time.
- Pierce foods with a skin to prevent them bursting.
- Allow for standing time.
When cleaning a microwave oven…
- Wash, Polish and dry the outside of a microwave oven.
- Wipe up spills immediately.
- Clean out any food crumbs left behind before they start to rot.
- Use hot,soapy water or a microwave cleaner to clean the microwave.
When buying a microwave oven…
- How much does it cost?
- How much wattage do u need (600w - 1000w)?
- Does it come with a warranty?
- What size will suit the family needs?
Special features of a microwave oven…
- Automatic programming.
- Temperature probe.
- Auto-weight defrost.
- A browning dish.
- A browning element.
- A child lock.
See Refrigerators on page
328
