General Principles in the Working of Hydrometer NDA Questions

NDA Physics

General Principles in the Working of Hydrometer MCQ Questions


7.
Which factor does not influence a hydrometer reading?
A.
Temperature
B.
Pressure
C.
Shape of the container
D.
Density of the liquid
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ANSWER :
C. Shape of the container
8.
The specific gravity of a liquid is the ratio of its density to the density of
A.
Mercury
B.
Air
C.
Ethanol
D.
Water
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ANSWER :
D. Water
9.
A hydrometer designed for use in hot liquids must be
A.
Made of glass
B.
Calibrated for high temperature
C.
Submerged deeper
D.
used quickly
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ANSWER :
B. Calibrated for high temperature
10.
For best results, a hydrometer should be used in a
A.
Still liquid
B.
Flowing liquid
C.
Heated liquid
D.
Frozen liquid
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ANSWER :
A. Still liquid
11.
To obtain an accurate reading, the hydrometer should be read at
A.
The top of the meniscus
B.
The bottom of the meniscus
C.
The center of the meniscus
D.
Any point along the meniscus
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ANSWER :
B. The bottom of the meniscus
12.
A saccharometer is a type of hydrometer used for measuring
A.
Density of milk
B.
Density of acids
C.
Sugar concentration in solutions
D.
Alcohol concentration
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ANSWER :
C. Sugar concentration in solutions