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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 651. |
In the word computer, the letters CD are used for? |
| A. | compact disc |
| B. | compressed disc |
| C. | computerized data |
| D. | Compressed data |
| Answer» B. compressed disc | |
| 652. |
ISI marked brand is known as? |
| A. | certification mark |
| B. | bookmark |
| C. | trademark |
| D. | identity mark |
| Answer» B. bookmark | |
| 653. |
Where is the hard drive usually located? |
| A. | after the printer |
| B. | attached to the back of the computer |
| C. | under the monitor |
| D. | within the base unit system |
| Answer» E. | |
| 654. |
What material are usually made ofIC-chipsfor computers? |
| A. | silicone |
| B. | lead |
| C. | Chromium |
| D. | Gold |
| Answer» B. lead | |
| 655. |
Which measure of memory is the largest? |
| A. | MB |
| B. | GB |
| C. | TB |
| D. | KB |
| Answer» D. KB | |
| 656. |
What is the extension of picture file on computer? |
| A. | . jpeg |
| B. | . png |
| C. | . gif |
| D. | . mdb |
| Answer» E. | |
| 657. |
Various computer cables and . . . . . Connected to LAN by? |
| A. | modem |
| B. | interface card |
| C. | special wiring |
| D. | telephone lines |
| Answer» C. special wiring | |
| 658. |
Who is considered the father of computer? |
| A. | Babbage |
| B. | hallrith |
| C. | Levniz |
| D. | pascal |
| Answer» B. hallrith | |
| 659. |
Which is the most powerful computer? |
| A. | super computer |
| B. | microcomputer |
| C. | mini computer |
| D. | all of the above |
| Answer» B. microcomputer | |
| 660. |
The computer cannot boot if it does not have it ? |
| A. | compiler |
| B. | loader |
| C. | assembler |
| D. | Operating System |
| Answer» E. | |
| 661. |
Which of the following cannot act as both input and output devices? |
| A. | tele-printer |
| B. | floppy disk drives |
| C. | scanner |
| D. | optical disc drives |
| Answer» C. scanner | |
| 662. |
Who is the inventor of thermos flask? |
| A. | Wall |
| B. | Stephen |
| C. | Kirchoff |
| D. | newton |
| Answer» B. Stephen | |
| 663. |
Who discovered the black hole theory? |
| A. | s . Chandrashekhar |
| B. | Hargobind Khurana |
| C. | C . V. Raman |
| D. | s . Ramanujam |
| Answer» B. Hargobind Khurana | |
| 664. |
Who is the discoverer of nuclear reactor? |
| A. | William Harvey |
| B. | edward jenner |
| C. | Michael Faraday |
| D. | Enrico Fermi |
| Answer» E. | |
| 665. |
Pedology is related to which of the following scientific study? |
| A. | atmosphere |
| B. | Soil |
| C. | pollutant |
| D. | seed |
| Answer» C. pollutant | |
| 666. |
Mark the wrong combination? |
| A. | J. L. Baird - Television |
| B. | J. Parkinson - penicillin |
| C. | James Watt - Steam engine |
| D. | a . G. bell - telephone |
| Answer» C. James Watt - Steam engine | |
| 667. |
Who invented wireless? |
| A. | Marconi |
| B. | Charles Catering |
| C. | George Calle |
| D. | zenab grame |
| Answer» B. Charles Catering | |
| 668. |
Introduced the fourth dimension in physics? |
| A. | newton |
| B. | Einstein |
| C. | Galilean |
| D. | by Niels Bohr |
| Answer» C. Galilean | |
| 669. |
Marconi invented? |
| A. | of radio |
| B. | of television |
| C. | telegraph |
| D. | of electric bulb |
| Answer» B. of television | |
| 670. |
Who propounded the law of partial pressure of gases? |
| A. | newton |
| B. | Einstein |
| C. | by dalton |
| D. | by Fermi |
| Answer» D. by Fermi | |
| 671. |
Who among the following scientist was co-winner of Nobel Prize with his sons? |
| A. | Max Planck |
| B. | Albert Einstein |
| C. | William Henry Bragg |
| D. | Enrico Fermi |
| Answer» D. Enrico Fermi | |
| 672. |
Which scientist discovered the telescope? |
| A. | newton |
| B. | James Watt |
| C. | rutherford |
| D. | Galilean |
| Answer» E. | |
| 673. |
Which of the following instruments is used to find the position of submerged objects in the ocean? |
| A. | audiometer |
| B. | Galvanometer |
| C. | sextant |
| D. | Sonar |
| Answer» E. | |
| 674. |
Who invented the airplane? |
| A. | Wright Brothers |
| B. | James Watt |
| C. | Humphrey Davy |
| D. | brown |
| Answer» B. James Watt | |
| 675. |
Who is the inventor of microphone? |
| A. | Dr. kevin carmon |
| B. | Dr. Join Angel |
| C. | Acceptable Bell |
| D. | Stephen Hawking |
| Answer» D. Stephen Hawking | |
| 676. |
Nobel Prize was started in the name of Alfred Nobel who discovered? |
| A. | of airplane |
| B. | of telephone |
| C. | safety lamp key |
| D. | of dynamite |
| Answer» E. | |
| 677. |
Invented by Wilhelm Rन्टntgen? |
| A. | of radio |
| B. | of x-ray machine |
| C. | of electric bulb |
| D. | of electric motor |
| Answer» C. of electric bulb | |
| 678. |
Invention of typewriter? |
| A. | Davy |
| B. | Shoals |
| C. | rontzen |
| D. | Marconi |
| Answer» C. rontzen | |
| 679. |
Who was the inventor of the fountain pen? |
| A. | whatman |
| B. | parkar |
| C. | Chailpark |
| D. | Shaffer |
| Answer» B. parkar | |
| 680. |
Who is the inventor of lightning conductor? |
| A. | Graham Bell |
| B. | lord lister |
| C. | benjamin franklin |
| D. | Einstein |
| Answer» D. Einstein | |
| 681. |
Who was the first Indian scientist who invented short wave radio in the world? |
| A. | C . b. Raman |
| B. | satyen bose |
| C. | Meghnath Saha |
| D. | Jagdish Chandra Bose |
| Answer» E. | |
| 682. |
What is the Raman effect related to? |
| A. | heat |
| B. | Lightning |
| C. | Light |
| D. | magnetism |
| Answer» D. magnetism | |
| 683. |
Inventor of safety lamp? |
| A. | Marconi |
| B. | Davy |
| C. | Shoals |
| D. | rontzen |
| Answer» C. Shoals | |
| 684. |
What was the invention of submarine? |
| A. | J. NS . Van Tessel |
| B. | Bilhelm K. roentgen |
| C. | P . T. farnsworth |
| D. | David Brusnell |
| Answer» E. | |
| 685. |
In honor of which scientist was the Chandra X-ray telescope named? |
| A. | C . Venkata Raman |
| B. | J. C . boss |
| C. | P . C . opinion |
| D. | C . Chandrashekhar |
| Answer» E. | |
| 686. |
Who invented the Tire system? |
| A. | newton |
| B. | John Hadley |
| C. | copernicus |
| D. | thompson |
| Answer» D. thompson | |
| 687. |
What is the main air pollutant? |
| A. | CO |
| B. | CO₂ |
| C. | N₂ |
| D. | sulfur |
| Answer» B. CO₂ | |
| 688. |
Which of the following gas combines with hemoglobin to form a toxic substance in the blood? |
| A. | CO₂ |
| B. | CH⁴ |
| C. | CO |
| D. | O₂ |
| Answer» D. O₂ | |
| 689. |
Which of the following is a biorenewable pollutant? |
| A. | plastic |
| B. | DDT |
| C. | mercury (mercury) |
| D. | all these |
| Answer» E. | |
| 690. |
Who discovered the neutron in the atom? |
| A. | J. J. thomson |
| B. | chadwick |
| C. | rutherford |
| D. | newton |
| Answer» C. rutherford | |
| 691. |
The pollutant produced by a motor car that causes mental illness is |
| A. | NO₂ |
| B. | SO₂ |
| C. | Pb |
| D. | Hg |
| Answer» D. Hg | |
| 692. |
Harmful ultraviolet radiation from the sun is caused by? |
| A. | lung cancer |
| B. | oral cancer |
| C. | skin cancer |
| D. | liver cancer |
| Answer» D. liver cancer | |
| 693. |
The major air pollutant in cities like Mumbai and Kolkata is? |
| A. | CO and SO₂ |
| B. | hydrocarbons |
| C. | algal spores |
| D. | ozone |
| Answer» B. hydrocarbons | |
| 694. |
Who discovered the Rh factor? |
| A. | Huxley |
| B. | landsteiner and wiener |
| C. | Darwin |
| D. | Wallace |
| Answer» C. Darwin | |
| 695. |
Which of the following gas does not pollute the air? |
| A. | O₂ |
| B. | CO |
| C. | CO₂ |
| D. | SO₂ |
| Answer» B. CO | |
| 696. |
What is Meenimata disease? |
| A. | by combustion of petroleum |
| B. | arsenic in water |
| C. | mercury pollution in water |
| D. | due to excess of nitrate in water |
| Answer» D. due to excess of nitrate in water | |
| 697. |
Which one of the following is not a part of vehicular pollution? |
| A. | H₂ |
| B. | CO |
| C. | NO₂ |
| D. | SO₂ |
| Answer» B. CO | |
| 698. |
What is the main source of pollution in metropolitan cities? |
| A. | radioactive plant |
| B. | self propelled vehicle |
| C. | Industry |
| D. | insecticide |
| Answer» C. Industry | |
| 699. |
Where is the National Institute of Environmental Engineering located? |
| A. | in Ranchi |
| B. | in cuttack |
| C. | in jamshedpur |
| D. | in nagpur |
| Answer» E. | |
| 700. |
Which gas was leaked in Bhopal accident? |
| A. | carbon monoxide |
| B. | ethyl isocyanate |
| C. | SO₂ and NO₂ |
| D. | Methyl Isocyanate or Mick |
| Answer» E. | |