CBSE Questions for Class 8 General Knowledge India: Science And Technology Quiz 12 - MCQExams.com

Non-steroidal weekly oral contraceptives pill developed by CDRI (Central Drug Research Institute) Lucknow is ___________.
  • Copper-T
  • Mala-D
  • Centchroman (Saheli)
  • All of the above.
What will happen if the power density of modern circuits is increased as the number of transistors per chip scales increased? 
  • Power efficiency will be decreased
  • Power efficiency will be increased
  • Power efficiency will be decreased at the first instant then increased
  • Power efficiency will remain unchanged
Dornier-228 is a surveillance aircraft developed by ________.
  • HAL
  • DRDO
  • ISRO
  • BEL
Consider the following statements.
The Indian Coast Guard came into existence in 1978.
The Coast Guard is responsible for surveillance of the Indian Exclusive Economic Zone.
The command and control of the Coast Guard lies with the Director General of Coast Guard Headquarters at Mumbai.
Which of the statements given above is/are correct?
  • 1, 2 and 3
  • 1 and 2
  • 2 and 3
  • Only 3
Dual Energy X-ray Absorptiometry  (DEXA) is used to measure _________.
  • spread of soil tumour
  • bone density
  • ulcerous growth in stomach
  • extent of brain haemorrhage
Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacids is __________________.
  • Sodium hydrogen phthalate
  • Magnesium hydroxide
  • Calcium hydroxide
  • Manganese acetate
Dementia is _______________.
  • complete loss of memory
  • partial loss of memory
  • increased memory abilities
  • none of the above
Where is National Institute of Nutrition located?
  • Bengaluru
  • Hyderabad
  • Mysore
  • Pune
'Garuda-V', concluded recently, is a joint exercise between the Air Force of India and _________.
  • Japan
  • Canada
  • Russia
  • France
India has decided to gift a Dornier-228 maritime patrol plane, manufactured by HAL, to an Indian Ocean island nation that enjoys close ties with the South Asian giant, to make it capable of carrying out surveillance in its waters against pirates and maritime terror groups. Which one is that country?
  • Seychelles
  • Maldives
  • Sri Lanka
  • Mumbai
Central Government has banned the manufacture, sale and distribution of Dextropropoxyphene. It was used as ___________.
  • painkiller
  • nutrition supplement
  • hair treatment
  • eye drop
Match the following.
List I(Institute)List-II(Location)
A. National Institute for Visually Handicapped$$1$$. Kolkata
B. National Institute for Orthopaedically Handicapped$$2$$. Secunderabad
C. National Institute for Mentally Handicapped$$3$$. New Delhi
D. Institute for the Physically Handicapped$$4$$. Cuttack

$$5$$. Dehradun
  • A-$$5$$, B-$$1$$, C-$$2$$, D-$$3$$
  • A-$$3$$, B-$$2$$, C-$$4$$, D-$$5$$
  • A-$$5$$, B-$$2$$, C-$$4$$, D-$$3$$
  • A-$$3$$, B-$$1$$, C-$$2$$, D-$$5$$
Which of the following can cause cancer as well as cure it depending upon its intensity and use?
  • Tobacco
  • Alcohol
  • Ionised radiation
  • Ultraviolet rays
Study the following statements.
Oral pill of birth control prevents ovulation.
Gestation period in human is 9 month.
A surgical procedure in which a small portion of sperm duct is removed and cut end is ligated in males is called vasectomy.
Which of the statement given above is/are correct?
  • 1 and 3
  • 2 and 3
  • 1 and 2
  • 1, 2 and 3
Oncogenes are associated with ___________.
  • Tuberculosis
  • Hepatitis
  • Cancer
  • Typhoid
The first human heart transplant was performed in _____________.
  • America
  • England
  • South Africa
  • France
When is the 'Hindi Divas' celebrated?
  • October 12th
  • October 19th
  • September 14th
  • September 7th
Select the correct statements given below about the components of the Robots.
  • In robot, the lead acid battery is used to get power supply.
  • The actuators of a robot act like the muscles of human beings.
  • The end effectors of the robot act as hands of robot to manipulate the objects.
  • All the statements given in A,B and C are correct about the components of the Robots.
Among the following, which were frequently mentioned in the news for the outbreak of Ebola virus recently?
  • Syria and Jordan
  • Guinea, Sierra Leone and Liberia
  • Philippines and Papua New Guinea
  • Jamaica, Haiti and Suriname
When is the 'World Population Day' observed?
  • July 18th
  • July 10th
  • July 11th
  • July 19th
Cancer is more common in older people because _____________.
  • their immune system have degenerated
  • the supply of certain hormones decline with age
  • their bodies are unable to adjust to the changing environment
  • they have accumulated more mutation
When is ' Quit India Day ' celebrated ?
  • September 8th
  • August 19th
  • August 9th
  • None of these
Which one of the following is correct about the CDMA channel access standard in the radio-telecommunications?
  • Time division is mainly used in the channel access of CDMA
  • Frequency division standard is utilised in the CDMA channel access
  • Spread-spectrum technology with special codes is used in the CDMA channel access
  • None of the statements given in a, b and c is correct about the channel access of CDMA
Select the correct statements about telecommunication.
  • Synchronous CDMA is more advantageous in the transmission of signals than the Asynchronous CDMA.
  • TDMA can use the spectrum more efficiently in mobile telephony applications than the Asynchronous CDMA.
  • Practically CDMA, TDMA and FDMA have exactly the same spectral efficiency in the transmission of data/information.
  • TDMA systems synchronise the transmission times of all the users to ensure that they are received in the correct timeslot and do not cause interference.
Consider the following statements:
Very Small Aperture Terminal (VSAT) access satellites in geosynchronous orbit to relay data from small remote earth stations to other terminals.
VSAT antennas range from 1.5 m to 3 m in diameter.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
What is the Naked DSL?
  • It is a digital subscriber line without the associated dial tone
  • It is an analog subscriber line that transmits signals to the customer terminals
  • It is a digital subscriber line without the telephone network
  • None of the statements in (a), (b) and (c) are correct about the Naked DSL
Consider the following statements:
3G mobile broadband cannot be used to connect internet in personal computers.
The original and most widespread radio interface for 3G mobile telecommunication is W-CDMA .
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following channels is used by the WiMAX for the uplink and downlink in the mobile telecommunications?
  • Frequency Division Multiple Access (FDMA)
  • Orthogonal Frequency Division Multiple Access (OFDMA)
  • Code Division Multiple Access (CDMA)
  • Time Division Multiple Access (TDMA)
Consider the following statements:
Satellite telephone connects to orbiting satellites instead of terrestrial cell sites.
Satellite telephone provides the voice, short messaging and low-bandwidth internet services.
Which of the statement(s) given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements about Saraswati Samman.
$$1$$. The Saraswati Samman is the most prestigious award of the KK Birla Foundation.
$$2$$. The Samman is given annually to an outstanding literary work published in Hindi only during the last $$10$$ years.
Which of the statements given is/are correct?
  • $$1, 2$$ and $$3$$
  • $$1$$ and $$2$$
  • $$1$$ and $$3$$
  • Only $$2$$
Which one of the following mobile operating systems is the most common in the world?
  • Bada Operating System
  • Window Operating System
  • Android Operating System
  • Symbian Operating System
Consider the following statements.
The performance of radio communication depends on an antenna system.
The world's first commercial mobile WiMAX service was opened in South Korea.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following electromagnetic spectra is used in the cordless telephone to communicate the wireless handset with the base station connected telephone line?
  • UV-rays
  • X-rays
  • Gamma rays
  • Radio wave
Which one of the following media forms the medium for the Public Switched Telephone Network (PSTN)?
  • Fibre optic cable
  • Communications satellites
  • Undersea telephone cables
  • All of the above
Which one of the following microwave bands is used to communicate between NASA's space shuttles and the International Space Station?
  • A-band
  • C-band
  • S-band
  • Q-band
Consider the following statements:
In cordless telephones, the higher frequency between the wireless handset and the base station bring more clarity of voice.
At the higher frequency region, the cordless phone gets interference from the microwave oven and Bluetooth.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
Microwaves are a non-ionizing electromagnetic radiation.
Microwaves like X-rays are extremely carcinogenic and produce several health hazards.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
A Metropolitan Area Network (MAN) usually interconnects a number of Local Area Networks (LANs) using a high capacity backbone technology. Which one of the following links can be used to interconnect the LANs in the MAN?
  • Microwave link
  • Radio link
  • Infrared Laser link
  • All of the above
Consider the following statements:
K-band is the portion of the radio waves of electromagnetic spectra.
K-band is easily absorbed by the water vapour.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following frequency bands of the microwave region.
C-band  X-bandKu-band Ka-band
Which of the bands given above is/are used in the satellite communication systems?
  • 1, 2, 3 and 4
  • 1, 2 and 3
  • 2 and 3
  • 3 and 4
Unlike MASER, the LASER amplifies the light energy by stimulating the photons. Then, which parts of the electromagnetic spectra are amplified in the MASER?
  • UV and Visible regions
  • Visible and IR regions
  • UV and IR regions
  • IR and Microwave regions
Consider the following statements:
Asymmetric digital subscriber line enables faster data transmission over copper telephone lines than the conventional voice band modem.
Asymmetric digital subscriber line uses the same frequencies that are used by a voice telephone call.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Very High bit-rate Digital Subscriber Line (VHDSL) is a DSL technology providing faster data transmission over a single flat untwisted or twisted pair of copper wires.
Which one of the following services is supported by the Advanced VHDSL technology?
  • Voice and data transmission
  • Interactive gaming
  • High definition television (HDTV)
  • All of the above
Who had invented the mechanical television which is the pioneer of modern television?
  • Philo T Farnsworth
  • Vladimir Kosma Zworykin
  • Karl Braun Charles
  • Francis Jenkins
Consider the following statements:
Wavelength Division Multiple Access is a variant of the Frequency Division Multiple Access.
In Wavelength Division Multiple Access, the different data streams are transmitted using the different colours in fibre-optical communication systems.
Which of the statements given above is/are correct? 
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
Colour CRTs have three electron guns, one for each primary colour.
Cats eye consisting of a phosphor tube of colour television acts as tuning guide.
Which of the statements given above is/are correct? 
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
With reference to Near Field Communication Technology, which of the following statements is/are correct?
It is a contactless communication technology that uses electromagnetic radio fields.
NFC is designed for use by devices which can be at a distance of even a meter from each other.
NFC can use encryption when sending sensitive information.
Select the correct answer using the codes given below.
  • 1 and 2
  • Only 3
  • 1 and 3
  • 1, 2 and 3
Which one of the following devices has installed Wi-Fi devices in its system?
  • Smartphones
  • Video game consoles
  • Computer printers
  • All of the above
Who had coined the term television at the First International Electricity Congress held in Paris?
  • Paul Nipkow
  • Constantin Perskyi
  • JJ Thomson
  • Henry Patrick
Which one of the following networks has the networking system whose communications links cross metropolitan, regional, or national boundaries?
  • CAN
  • PAN
  • MAN
  • WAN
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