GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 011
101). The atmosphere exerts enormous pressure on us. But we do not feel it because
A). we are used to it
B). our bones are very strong and can withstand this pressure
C). the surface area of our head is very small
D). our blood exerts a pressure slightly more than that of the atmosphere
Answer: our blood exerts a pressure slightly more than that of the atmosphere
102). In a barometer, mercury is preferred over water because
A). mercury is a good conductor of heat
B). mercury is shining and therefore its level can be read easily
C). mercury is available in pure form
D). mercury has high density and low vapour pressure
Answer: mercury has high density and low vapour pressure
103). Figure shows a simple form of a hydraulic press with both limbs of circular cross-section. How much weight is required on the narrow limb to support a 20 kg weight as shown in the figure? Figure shows a simple form of a hydraulic press with both limbs of circular cross-section. How much weight is required on the narrow limb to support a 20 kg weight as shown in the figure?
A). we are used to it
B). our bones are very strong and can withstand this pressure
C). the surface area of our head is very small
D). our blood exerts a pressure slightly more than that of the atmosphere
Answer: our blood exerts a pressure slightly more than that of the atmosphere
102). In a barometer, mercury is preferred over water because
A). mercury is a good conductor of heat
B). mercury is shining and therefore its level can be read easily
C). mercury is available in pure form
D). mercury has high density and low vapour pressure
Answer: mercury has high density and low vapour pressure
103). Figure shows a simple form of a hydraulic press with both limbs of circular cross-section. How much weight is required on the narrow limb to support a 20 kg weight as shown in the figure? Figure shows a simple form of a hydraulic press with both limbs of circular cross-section. How much weight is required on the narrow limb to support a 20 kg weight as shown in the figure?
A). 5 kg
B). 10 kg
C). 20 kg
D). none of these
Answer: 5 kg
104). An object weighs maximum in
A). air
B). water
C). hydrogen
D). vacuum
Answer: vacuum
105). Four solid cubes of different metals, each one having a mass of one kg, are weighed in water
A). All cubes weigh equal
B). Cube with minimum density weighs minimum
C). Cube with minimum density weighs maximum
D). None of these is correct
Answer: Cube with minimum density weighs minimum
106). Which one of the following would a hydrogen balloon find easiest to lift?
A). 1 kg of water
B). 1 kg of copper
C). 1 kg of loosely packed feathers
D). all the same
Answer: all the same
107). A stone is thrown into a deep lake. As it sink deeper and deeper into the water, the upthrusting on it
A). increases
B). decreases
C). first decreases then increases
D). remains constant
Answer: remains constant
108). Raindrops are spherical due to
A). viscosity of water
B). suffice tension
C). continuous evaporation
D). air friction
Answer: suffice tension
109). When two mercury drops are brought into contact they merge to form a bigger drop because liquids have a tendency to possess
A). minimum volume
B). maximum surface area
C). minimum surface area
D). maximum volume
Answer: minimum surface area
B). 10 kg
C). 20 kg
D). none of these
Answer: 5 kg
104). An object weighs maximum in
A). air
B). water
C). hydrogen
D). vacuum
Answer: vacuum
105). Four solid cubes of different metals, each one having a mass of one kg, are weighed in water
A). All cubes weigh equal
B). Cube with minimum density weighs minimum
C). Cube with minimum density weighs maximum
D). None of these is correct
Answer: Cube with minimum density weighs minimum
106). Which one of the following would a hydrogen balloon find easiest to lift?
A). 1 kg of water
B). 1 kg of copper
C). 1 kg of loosely packed feathers
D). all the same
Answer: all the same
107). A stone is thrown into a deep lake. As it sink deeper and deeper into the water, the upthrusting on it
A). increases
B). decreases
C). first decreases then increases
D). remains constant
Answer: remains constant
108). Raindrops are spherical due to
A). viscosity of water
B). suffice tension
C). continuous evaporation
D). air friction
Answer: suffice tension
109). When two mercury drops are brought into contact they merge to form a bigger drop because liquids have a tendency to possess
A). minimum volume
B). maximum surface area
C). minimum surface area
D). maximum volume
Answer: minimum surface area
110). On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
A). mercury is a metal
B). density of mercury is greater than that of water
C). cohesion of mercury is greater than its adhesion with glass
D). cohesion of water is greater than its adhesion with glass
Answer: cohesion of mercury is greater than its adhesion with glass
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