Exercise: Si Units

Questions for: Si Units

The bar used for defining the standard metre at the International office of weights and measures at Sevres near Paris, is composed of
A:
50% platinum and 50% iridium
B:
60% platinum and 40% iridium
C:
70% platinum and 30% iridium
D:
80% platinum and 20% iridium
Answer: E
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The fundamental units in S.I. System are :
A:
Centimetre, gram, second
B:
Foot, pound, second
C:
Metre, kilogram, second
D:
Kilometre, kilogram, minute
Answer: C
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The unit kg/m3 is used for
A:
force
B:
density
C:
volume
D:
pressure.
Answer: B
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Candela (Cd) is used to express
A:
luminous intensity
B:
electric current intensity
C:
power
D:
frequency.
Answer: A
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Hertz (Hz) is used to express
A:
Luminous intensity
B:
electric current intensity
C:
power
D:
frequency.
Answer: D
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