General Principles in the Working of Hydrometer NDA Questions

NDA Physics

General Principles in the Working of Hydrometer MCQ Questions


1.
A hydrometer measures
A.
Air pressure
B.
Fluid density
C.
Temperature
D.
Fluid flow
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ANSWER :
B. Fluid density
2.
The principle a hydrometer works on is
A.
Archimedes' principle
B.
Pascal's law
C.
Newton's law
D.
Bernoulli's principle
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ANSWER :
A. Archimedes' principle
3.
The scale on a hydrometer is typically
A.
Linear
B.
Logarithmic
C.
Arbitrary
D.
Exponential
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ANSWER :
A. Linear
4.
A hydrometer used in oil would show a reading
A.
Higher than water
B.
Lower than water
C.
Same as water
D.
unrelated to water
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ANSWER :
B. Lower than water
5.
If a hydrometer is used in a non-calibrated liquid, the reading will be
A.
Accurate
B.
Inaccurate
C.
Constant
D.
Variable
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ANSWER :
B. Inaccurate
6.
The purpose of the graduated scale on a hydrometer is to
A.
Measure viscosity
B.
Indicate temperature
C.
Show Specific gravity
D.
Measure Ph
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ANSWER :
C. Show Specific gravity