1. The SI
standard of time is based on:
A. the
daily rotation of the earth
B. the
frequency of light emitted by Kr86
C. the
yearly revolution of the earth about the sun
D. a
precision pendulum clock
E. none of
these
Ans: E
2. A
nanosecond is:
A. 109
s
B. 10−9
s
C. 10−10
s
D. 10−10
s
E. 10−12
Ans: B
3. The SI
standard of length is based on:
A. the
distance from the north pole to the equator along a meridian passing through
Paris
B.
wavelength of light emitted by Hg198
C.
wavelength of light emitted by Kr86
D. a
precision meter stick in Paris
E. the
speed of light
Ans: E
4. In
1866, the U. S. Congress defined the U. S. yard as exactly 3600/3937
international meter.
This was
done primarily because:
A. length
can be measured more accurately in meters than in yards
B. the
meter is more stable than the yard
C. this
definition relates the common U. S. length units to a more widely used system
D. there
are more wavelengths in a yard than in a meter
E. the
members of this Congress were exceptionally intelligent
Ans: C
5. Which
of the following is closest to a yard in length?
A. 0.01m
B. 0.1m
C. 1m
D. 100m
E. 1000m
Ans: C
6. There
is no SI base unit for area because:
A. an area
has no thickness; hence no physical standard can be built
B. we live
in a three (not a two) dimensional world
C. it is
impossible to express square feet in terms of meters
D. area
can be expressed in terms of square meters
E. area is
not an important physical quantity
Ans: D
7. The SI
base unit for mass is:
A. gram
B. pound
C.
kilogram
D. ounce
E. kilopound
Ans: C
8. A gram
is:
A. 10−6
kg
B. 10−3
kg
C. 1 kg
D. 103
kg
E. 106
kg
Ans: B
9. A
sphere with a radius of 1.7 cm has a volume of:
A. 2.1 × 10−5
m3
B. 9.1 × 10−4
m3
C. 3.6 × 10−3
m3
D. 0.11 m3
E. 21 m3
Ans: A
10. 24. A
square with an edge of exactly 1 cm has an area of:
A. 10−6
m2
B. 10−4
m2
C. 102
m2
D. 104
m2
E. 106
m2
Ans: B
