Units and Measurements Test

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Units and Measurements Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

What is the total number of fundamental units in the SI system of measurement?

A
5

B
7

C
9

D
6
Question 2
1 / -0

Light Year is the unit of

A
intensity of illumination

B
distance

C
time

D
parallax

Solution

The light-year is a unit of length used to express astronomical distances. It is about 9.5 quadrillion metres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days).
Question 3
1 / -0

SI unit of temperature is

A
degree Kelvin

B
Kelvin

C
degree Celsius

D
Celsius

Solution

The SI unit of temperature is Kelvin.
Question 4
1 / -0

Which of the following is a derived unit?

A
Mass

B
Length

C
Time

D
Velocity
Question 5
1 / -0

Which of the following relations is correct?

A
180° = π rad

B
90° = 2 π rad

C
270° = π rad

D
360° = π rad
Question 6
1 / -0

1 fermi is equal to

A
10^-9 m

B
10^-10 m

C
10^-12 m

D
10^-15 m

Solution

1 fermi = 0.001 picometre
0.001 picometre = 10^-15 metre = 1 fermi
Question 7
1 / -0

Size of a proton is of the order of

A
10^-4 m

B
10^-10 m

C
10^-14m

D
10^-15 m
Question 8
1 / -0

Find the value of one year in SI units, assuming that the year is not a Leap Year.

A
3600 s

B
3.15 6 × 10⁷ s

C
8.64 × 10² s

D
2.58 × 10⁴ s

Solution

Value of one year in SI units means that the answer should be in seconds.
1 year = (365 x 24 x 60 x 60) s

= 31536000 s
= 3.154 x 10⁷ s
Question 9
1 / -0

One horse power is equal to

A
746 watts

B
746 kilowatts

C
746 megawatts

D
None of these

Solution

Horse power is the unit for measuring the power. One horse power is equal to 746 watts or 0.746 watts or 0.000746 megawatts.

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Units and Measurements Test - 1

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Units and Measurements Test - 1

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SHARING IS CARING

Question 1

5

7

9

6

Question 2

intensity of illumination

distance

time

parallax

Solution

Question 3

degree Kelvin

Kelvin

degree Celsius

Celsius

Solution

Question 4

Mass

Length

Time

Velocity

Question 5

180° = π rad

90° = 2 π rad

270° = π rad

360° = π rad

Question 6

10-9 m

10-10 m

10-12 m

10-15 m

Solution

Question 7

10-4 m

10-10 m

10-14 m

10-15 m

Question 8

3600 s

3.15 6 × 107 s

8.64 × 102 s

2.58 × 104 s

Solution

Question 9

746 watts

746 kilowatts

746 megawatts

None of these

Solution

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10^-9 m

10^-10 m

10^-12 m

10^-15 m

10^-4 m

10^-10 m

10^-14m

10^-15 m

3.15 6 × 10⁷ s

8.64 × 10² s

2.58 × 10⁴ s