General Science Questions and Answers

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Q91
Conversion of chemical energy into electrical energy occurs in ?
  • A dynamos
  • B electric heaters
  • C battery
  • D atomic bombs
Answer: Option C
Q92
In the ordinary fire extinguisher, carbon dioxide is generated by the reaction of ?
  • A marble powder and dilute HCL
  • B magnesite and dilute HCL
  • C limestone and dilute Sulphuric Acid
  • D sodium bicarbonate and dilute Sulphuric Acid
Answer: Option D
Q93
Which of the following take place when the subject speaks untruth while being tested by the polygraph instrument? 1.. His blood pressure goes up. 2. His pulse quickens. 3. His skin darkens. 4. He sneezes.
  • A l and 2
  • B 3 and 4
  • C l,2 and 3
  • D 2,3 and 4
Answer: Option A
Q94
What is the function of a microprocessor in a computer?
  • A It allows the key board to write on the computer.
  • B It allows the outputs to be taken from a computer.
  • C It performs all the functions of a CPU (Central Processing Unit).
  • D None of these
Answer: Option C
Q95
Teletext means?
  • A the process of convening black & white TV sets into coloured ones.
  • B flashing of telephone conversation on TV screen.
  • C flashing the text of the message on the telex machine.
  • D flashing of the text of news and information on the TV screen
Answer: Option D
Q96
Which of the following statements about a refrigerator is/are correct? 1. It converts electrical energy into heat energy. 2. It converts electrical energy into mechanical energy. 3. It transfers heat from a high temperature to a low temperature. 4. It transfers heat from a low temperature to a high temperature.
  • A 1 and3
  • B 2 and 3
  • C 1 and 4
  • D 4 only
Answer: Option C
Q97
Which of the following statements are true regarding transmission of television programmes? 1. Picture is transmitted with velocity of light. 2. Sound is transmitted with velocity of sound. 3. Sound is transmitted with velocity of light. 4. Different colours of the picture.are transmitted with different velocities.
  • A l and 3
  • B 1,2 and 3
  • C 2,3 and 4
  • D l,3 and 4
Answer: Option A
Q98
The anode in a dry cell consists of
  • A graphite
  • B zinc
  • C copper
  • D cadmium
Answer: Option A
Q99
The technique used to transmit audio signals in television broadcasts is
  • A Amplitude Modulation
  • B Frequency Modulation
  • C Pulse Code Modulation
  • D Time Division Multiplexing
Answer: Option C
Q100
Floppy disc in a computer system is
  • A compiler
  • B core memory
  • C software
  • D device for storing and retrieving data
Answer: Option D

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