INDIAN POLITY MCQS SET 60

INDIAN POLITY MCQS SET 60

591) Very small time intervals are accurately measured by the
A) Pulsars
B) Quartz clocks
C) Atomic clocks
D) White dwarfs
Answer: Atomic clocks
   
592) Decibel is the unit used for
A) speed of light
B) intensity of heat
C) intensity of sound
D) radio wave frequency
Answer: intensity of sound
   
593) 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 aeroplane
D) None of these
Answer: It is a flight recorder in an aeroplane
   
594) 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: conducting the lightning safely to the ground
   
595) The principle of working of periscope is based on
A) reflection only
B) refraction only
C) reflection and refraction
D) reflection and interference
Answer: reflection and refraction

596) 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: Piezo electric effect
   
597) Jet engines are
A) rotary engines
B) turbine engines
C) external combustion engines
D) reaction engine
Answer: reaction engine
   
598) The conversion of electrical energy into chemical energy is observed in
A) fan
B) storage battery
C) heater
D) incandescent bulb
Answer: storage battery
   
599) Greenhouse is
A) a building chiefly of glass in which the temperature is very low
B) a building which green plants are cultivated
C) a building chiefly of glass in which the temperature is maintained within the desired range
D) none of these
Answer: a building chiefly of glass in which the temperature is maintained within the desired range
   
600) The mixed oxide fuel is used for which of the following?
A) Nuclear Reactors
B) Aeroplanes
C) cryogenic Engines
D) PSLV rockets
Answer: cryogenic Engines