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WorksheetsCivil war-Day 50-PWD-Pressure measurements,Buoyancy & floatation
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
Intensity of static pressure due to water is proportional to :
a)
Height of water
b)
Temperature
c)
Velocity
d)
Atmospheric pressure
2.
An open tank contains water to depth of 2 m and oil over it to a depth of 1 m. If the specific gravity of oil is 0.8, then the pressure intensity at the interface of the two fluid layers will be
a)
7848 N/m2
b)
8720 N/m2
c)
9747 N/m2
d)
9750 N/m2
3.
The standard atmospheric pressure is 762 mm of Hg. At a specific location the barometer reads 700 mm of Hg. At this place absolute pressure of 380 mm of Hg corresponds to
a)
320 mm of Hg (vacuum)
b)
382 mm of Hg (vacuum)
c)
62 mm of Hg (vacuum)
d)
62 mm of Hg (gauge)
4.
Which of the following pressure units represents the highest pressure?
a)
millibar
b)
mm of mercury
c)
N/mm²
d)
kgf/cm²
5.
The absolute pressure at a point is 75 kPa and atmospheric pressure is 100 kPa. Then vacuum pressure is
a)
75 kPa
b)
50 kPa
c)
25 kPa
d)
175 kPa
6.
If the weight of a body immersed in a fluid exceeds the buoyant force then the body will
a)
Tend to move downward and it may finally sink
b)
Float on the fluid
c)
Rise until its weight equals buoyant force
d)
Turn upside down
7.
A ship is seen to enter sea from a river. Its depth of submergence will
a)
Increase
b)
Decrease
c)
Remain at same level
d)
Depends on material of ship
8.
A gold coin weighs 20 gm in air 18.2 gm in alcohol and 18 gm in water then SG of alcohol is
a)
1.8
b)
0.9
c)
2
d)
0.8
9.
A stable submerged body has :
a)
Centre of gravity below centre of buoyancy
b)
Centre of gravity below metacentre
c)
Centre of gravity above centre of buoyancy
d)
Centre of gravity above metacentre
10.
An object with SG 4 weighs 100N in air. When fully immersed in water its weight will be
a)
25N
b)
75 N
c)
15 N
d)
None of these
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