GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 016
151). The hygrometer is an instrument to measure
A). the relative density of liquids
B). the purity of milk
C). relative humidity
D). atmospheric pressure
Answer: relative humidity
152). The boiling point of water
A). is always 100 degree c
B). depends on atmospheric pressure
C). depends on the material of the container
D). depends on relative humidity
Answer: depends on atmospheric pressure
153). It takes much longer to cook things in the hills than in the plains, because
A). due to low atmospheric pressure in the hills the boiling point of water is raised, and therefore water takes longer to boil
B). in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at lower temperature
C). in the hills the atmospheric temperature is low and therefore a lot of heat is lost to the atmosphere
D). in the hills the humid atmosphere absorbs a lot of heat, leaving very little for the cooking
Answer: in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at lower temperature
154). Food is cooked faster in a pressure cooker because
A). heat cannot escape from the cooker
B). steam is hotter than the boiling water
C). due to high pressure the boiling point of water is raised
D). in the cooker water starts boiling at a lower temperature
Answer: due to high pressure the boiling point of water is raised
155). The cover of a solar cooker is made of glass
A). because glass allows sunlight into the container but does not allow heat radiation out of it
B). because glass is transparent and one can see the food cooking
C). because glass does not absorb heat radiation and, therefore, there is no wastage of energy
D). because glass is a good conductor of heat and is also cheap
Answer: because glass allows sunlight into the container but does not allow heat radiation out of it
156). We get energy directly from
A). the sun
B). ocean
C). space
D). atmosphere
Answer: the sun
157). Light waves are different from sound waves in that
A). light waves are electromagnetic but sound waves are not
B). light waves can travel through water but sound waves cannot
C). light travels with the same speed in all media
D). light waves produce interference but sound waves do not
Answer: light waves are electromagnetic but sound waves are not
158). Which of the following electromagnetic waves has the longest wave length?
A). Ultra-violet
B). light rays
C). gamma rays
D). infrared
Answer: infrared
159). Delhi radio station broadcasts at a frequency of 819 kHz. What is the wave length of the radio waves? ,
A). 3.66×10^3 m
B). 3.66×10^2 m
C). 1.74×10^6 m
D). 2.4×10^−2 m
Answer: 3.66×10^2 m
160). The layer of the atmosphere which reflects the radio waves back to the earth is called
A). stratosphere
B). tropopause
C). ionosphere
D). troposphere
Answer: ionosphere
A). the relative density of liquids
B). the purity of milk
C). relative humidity
D). atmospheric pressure
Answer: relative humidity
152). The boiling point of water
A). is always 100 degree c
B). depends on atmospheric pressure
C). depends on the material of the container
D). depends on relative humidity
Answer: depends on atmospheric pressure
153). It takes much longer to cook things in the hills than in the plains, because
A). due to low atmospheric pressure in the hills the boiling point of water is raised, and therefore water takes longer to boil
B). in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at lower temperature
C). in the hills the atmospheric temperature is low and therefore a lot of heat is lost to the atmosphere
D). in the hills the humid atmosphere absorbs a lot of heat, leaving very little for the cooking
Answer: in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at lower temperature
154). Food is cooked faster in a pressure cooker because
A). heat cannot escape from the cooker
B). steam is hotter than the boiling water
C). due to high pressure the boiling point of water is raised
D). in the cooker water starts boiling at a lower temperature
Answer: due to high pressure the boiling point of water is raised
155). The cover of a solar cooker is made of glass
A). because glass allows sunlight into the container but does not allow heat radiation out of it
B). because glass is transparent and one can see the food cooking
C). because glass does not absorb heat radiation and, therefore, there is no wastage of energy
D). because glass is a good conductor of heat and is also cheap
Answer: because glass allows sunlight into the container but does not allow heat radiation out of it
156). We get energy directly from
A). the sun
B). ocean
C). space
D). atmosphere
Answer: the sun
157). Light waves are different from sound waves in that
A). light waves are electromagnetic but sound waves are not
B). light waves can travel through water but sound waves cannot
C). light travels with the same speed in all media
D). light waves produce interference but sound waves do not
Answer: light waves are electromagnetic but sound waves are not
158). Which of the following electromagnetic waves has the longest wave length?
A). Ultra-violet
B). light rays
C). gamma rays
D). infrared
Answer: infrared
159). Delhi radio station broadcasts at a frequency of 819 kHz. What is the wave length of the radio waves? ,
A). 3.66×10^3 m
B). 3.66×10^2 m
C). 1.74×10^6 m
D). 2.4×10^−2 m
Answer: 3.66×10^2 m
160). The layer of the atmosphere which reflects the radio waves back to the earth is called
A). stratosphere
B). tropopause
C). ionosphere
D). troposphere
Answer: ionosphere
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