General Science Questions and Answers

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Q61
Which of the following is an element?
  • A Ruby
  • B Sapphire
  • C Emerald
  • D Diamond
Answer: Option D
Q62
An ordinary tube light used for lighting purposes contains
  • A fluorescent material and an inert gas
  • B one filament, reflective material and mercury vapour
  • C fluorescent material and mercury vapour
  • D two filaments, fluorescent material and mercury vapour
Answer: Option D
Q63
The term ‘Black Box’ is more commonly used in relation to which of the following?
  • A It is a box in which high grade uranium is kept to prevent radiation.
  • B It is a time capsule in which records of important events are kept to be opened at a later date,
  • C It is a flight recorder in an aero plane.
  • D None of these
Answer: Option C
Q64
The lightning conductor used in building, protects the building by
  • A dissipating the electric charge away from the building
  • B conducting the lightning safely to the ground
  • C absorbing the electric charge
  • D None of these
Answer: Option B
Q65
Sodium vapour lamps are preferred over incandescent lamp because of
  • A higher tolerance to voltage fluctuation
  • B higher intensity of illumination
  • C easy installation
  • D None of these
Answer: Option B
Q66
The principle of working of periscope is based on
  • A reflection only
  • B refraction only
  • C reflection and refraction
  • D reflection and interference
Answer: Option C
Q67
The working of the quartz crystal in the watch is based on
  • A Johnson effect
  • B Photoelectric effect
  • C Edison effect
  • D Piezo electric effect
Answer: Option D
Q68
A handwritten message can be instantly transmitted as such to any part of the world through
  • A Speed post
  • B Telex
  • C Electronic mail
  • D FAX
Answer: Option D
Q69
Which of the following combinations of aperture and shutter speed of a camera will allow the maximum exposure?
  • A F-5.6,1/l000
  • B F-8,l/250
  • C F-16,l/l25
  • D F-22,1/60
Answer: Option B
Q70
Hardware is related to?
  • A calculator
  • B computers
  • C acids
  • D heavy metals
Answer: Option B

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