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- Question
The cover of a solar coker is made of glass because
Options- A. it absorbs sun's rays
- B. it reflects sun's rays
- C. it retains the heat inside by the green house effect
- D. it rediates heat better than metals
- Correct Answer
- it retains the heat inside by the green house effect
ExplanationAs the inside of the cooker is painted black, heat absorption is more producing heat waves of longer wavelength which cannot escape through glass and hence are trapped inside. Thus the food is cooked.
- 1. The property of a substance to absorb moisture from the air on exposure is called
Options- A. osmosis
- B. deliquescence
- C. efflorescence
- D. desiccation Discuss
- 2. What furniture item was invented by California furniture designer Charles Prior Hall in 1968?
Options- A. Sofa bed
- B. Captain's chair
- C. Waterbed
- D. Hammock Discuss
- 3. Tetraethyl lead is used as
Options- A. pain killer
- B. fire extinguisher
- C. mosquito repellent
- D. petrol additive Discuss
- 4. Who won the Grand Slam title four times successively?
Options- A. Mortina Navratilova
- B. Steffi Graf
- C. Jennifer Capriati
- D. Monica Seles Discuss
- 5. What is the Websites code for the country New Zealand?
Options- A. NZ
- B. NW
- C. NE
- D. ZL Discuss
- 6. The two elements that are frequently used for making transistors are
Options- A. boron and aluminium
- B. silicon and germanium
- C. iridium and tungsten
- D. niobium and columbium Discuss
- 7. Which of the following is not a programming language?
Options- A. Basic
- B. Java
- C. Turing
- D. C# Discuss
- 8. The Central Processing Unit is an embeded chip that acts as the 'brains' of a computer. What Intel chip was used in the Altair (the first real personal computer)?
Options- A. 6502
- B. 8080
- C. 6400
- D. 8286 Discuss
- 9. The Objectives Resolution which laid down the main objectives to guide the deliberations of the Assembly was moved by
Options- A. Sardar Patel
- B. Jawaharlal Nehru
- C. K.M. Munshi
- D. B.R. Ambedkar Discuss
- 10. In which of the following activities silicon carbide is used?
Options- A. Making cement and glass
- B. Disinfecting water of ponds
- C. cutting very hard substances
- D. Making casts for statues Discuss
More questions
Correct Answer: deliquescence
Correct Answer: Waterbed
Correct Answer: petrol additive
Correct Answer: Steffi Graf
Correct Answer: NZ
Correct Answer: silicon and germanium
Correct Answer: Turing
Correct Answer: 8080
Explanation:
The Intel 8080 was a jazzed-up calculator chip. It was included in microcomputer kits which were little more than demonstration tools and did little except blink lights. Besides the 8080 chip, the Altair included a power supply, a front panel with a large number of lights and 256 bytes (not kilobytes) of memory. The kit sold for {$395} and had to be assembled.
Correct Answer: Jawaharlal Nehru
Correct Answer: cutting very hard substances
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