1. A solar cooker mainly uses which type of energy?
A) Wind Energy
B) Chemical Energy
C) Solar Energy
D) Electrical Energy
Answer: C) Solar Energy
2. The working principle of a solar cooker is based on:
A) Reflection only
B) Refraction only
C) Greenhouse effect
D) Conduction only
Answer: C) Greenhouse effect
3. The inner surface of a solar cooker is painted black because black color:
A) Reflects heat
B) Absorbs more heat
C) Produces light
D) Reduces temperature
Answer: B) Absorbs more heat
4. Which material is commonly used as a reflector in a solar cooker?
A) Wood
B) Plastic
C) Mirror
D) Rubber
Answer: C) Mirror
5. A solar cooker works most efficiently during:
A) Rainy day
B) Night time
C) Cloudy weather
D) Sunny day
Answer: D) Sunny day
6. Which of the following cannot be used in a solar cooker?
A) Boiling rice
B) Baking cake
C) Frying puri
D) Cooking vegetables
Answer: C) Frying puri
7. The transparent cover of a box-type solar cooker is usually made of:
A) Iron sheet
B) Glass
C) Wood
D) Cardboard
Answer: B) Glass
8. The main advantage of a solar cooker is that it:
A) Causes pollution
B) Uses expensive fuel
C) Saves conventional fuel
D) Works at night
Answer: C) Saves conventional fuel
9. Solar cookers are environment-friendly because they:
A) Emit smoke
B) Use fossil fuels
C) Do not produce harmful gases
D) Need electricity
Answer: C) Do not produce harmful gases
10. The box of a solar cooker is usually insulated to:
A) Increase weight
B) Reduce heat loss
C) Change color
D) Reflect sunlight
Answer: B) Reduce heat loss
11. Which component traps heat inside the solar cooker?
A) Reflector
B) Glass cover
C) Handle
D) Stand
Answer: B) Glass cover
12. A solar cooker is most suitable in areas with:
A) Heavy snowfall
B) Frequent storms
C) Abundant sunlight
D) Thick forests
Answer: C) Abundant sunlight
13. The reflector in a solar cooker helps to:
A) Absorb heat
B) Increase moisture
C) Focus sunlight into the box
D) Cool the cooker
Answer: C) Focus sunlight into the box
14. Cooking in a solar cooker usually takes:
A) Less time than gas
B) Same time as microwave
C) More time than LPG
D) No time
Answer: C) More time than LPG
15. Which of the following is a limitation of a solar cooker?
A) Cheap to maintain
B) No fuel cost
C) Cannot be used at night
D) No pollution
Answer: C) Cannot be used at night
16. Solar cooker helps in reducing:
A) Soil erosion
B) Deforestation
C) Earthquakes
D) Floods
Answer: B) Deforestation
17. The cooking containers used in a solar cooker are usually:
A) White and shiny
B) Transparent
C) Black and dull
D) Blue and glossy
Answer: C) Black and dull
18. Which type of solar cooker uses a curved reflector?
A) Box-type
B) Panel-type
C) Parabolic cooker
D) Electric cooker
Answer: C) Parabolic cooker
19. A parabolic solar cooker can:
A) Only boil water
B) Fry food
C) Work without sunlight
D) Cool food
Answer: B) Fry food
20. The energy conversion in a solar cooker is from:
A) Electrical to heat
B) Mechanical to light
C) Solar to heat
D) Chemical to electrical
Answer: C) Solar to heat
21. The outer body of a solar cooker is generally made of:
A) Thermocol or insulating material
B) Gold
C) Copper wire
D) Sponge
Answer: A) Thermocol or insulating material
22. Which of the following is not a part of a solar cooker?
A) Reflector
B) Glass sheet
C) Burner
D) Insulated box
Answer: C) Burner
23. Solar cookers are most effective between:
A) Midnight to 6 AM
B) 10 AM to 2 PM
C) 6 PM to 10 PM
D) 2 AM to 5 AM
Answer: B) 10 AM to 2 PM
24. The main reason for slow cooking in a solar cooker is:
A) Low temperature
B) High pressure
C) Excess fuel
D) High voltage
Answer: A) Low temperature
25. Solar cookers promote the use of:
A) Non-renewable energy
B) Renewable energy
C) Nuclear energy
D) Thermal power
Answer: B) Renewable energy
26. Which surface reflects maximum sunlight?
A) Rough black surface
B) Shiny silver surface
C) Wooden surface
D) Cloth surface
Answer: B) Shiny silver surface
27. The glass cover of a solar cooker allows:
A) Only heat to enter
B) Only air to enter
C) Sunlight to enter and trap heat
D) Water to enter
Answer: C) Sunlight to enter and trap heat
28. Solar cookers reduce the use of:
A) LPG
B) Oxygen
C) Nitrogen
D) Helium
Answer: A) LPG
29. Which season is best for using a solar cooker?
A) Winter with heavy clouds
B) Summer with clear sky
C) Rainy season
D) Foggy season
Answer: B) Summer with clear sky
30. Solar cooker is an example of:
A) Conventional energy device
B) Fossil fuel appliance
C) Renewable energy appliance
D) Nuclear device
Answer: C) Renewable energy appliance