GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 078

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 078

771). Consider the following statements :
Assertion (A) : The brightest planet in the solar system is venus. 

Reason(R) : It is very close to sun. Select your answer according to the codes given below :
A). Both (A) and (R) are true
B). Both (A) and (R) are false
C). (A) is true, but (R) is false
D). (A) is false, but (R) is true

Answer: Both (A) and (R) are true

   
772). Why railway tracks are covered with ballasts?
I. It gives the track flexibility to meet variation in pressure as the train passes over the track. 

II. It helps in drainage.
A). I only
B). II only
C). Neither I nor II
D). I and II

Answer: II only

   
773). The sound of a guitar and a violin can be differentiated because of the difference in the
A). frequency or pitch
B). quality of timber
C). loudness
D). method of playing

Answer: frequency or pitch


   
774). Why is there a spluttering sound when water is sprinkled on hot oil?
A). boiling point of the water is higher than that of oil
B). boiling point of the oil is higher than that of water
C). oil and water do not mix
D). oil and water combine to form a compound '

Answer: boiling point of the oil is higher than that of water


   
775). The phenomenon of mirage is due to?
A). increased absorption of light at higher temperature
B). change in the refractive index of air with change in temperature
C). total internal reflection
D). decreased absorption of light at higher temperature

Answer: total internal reflection




776). In India Apsara is connected with
A). nuclear reactor
B). dancer
C). goddess
D). none of these

Answer: nuclear reactor

   
777). The instrument used for measuring the force and velocity of wind is
A). altimeter
B). ammeter
C). anemometer
D). manometer

Answer: anemometer


   
778). Tungsten is used in the manufacture of electric bulbs because
A). it is both durable and economical
B). it is cheaper than other metals
C). it has high melting point
D). it makes the bulb light brighter

Answer: it has high melting point

   
779). Which one of the following statements incorrect?
A). evaporation takes place at all temperatures
B). evaporation increases with pressure
C). evaporation takes place from the free surface the liquid
D). evaporation precedes cooling

Answer: evaporation increases with pressure


   
780). Nobel prize was awarded to Einstein for his work
A). Special theory of relativity
B). General theory of relativity
C). Brownian motion
D). Photoelectric effect

Answer: Photoelectric effect