Units and Measurement – GK Quiz with Answers – Level 2

Units and Measurement Level 2 Practice Quiz on Dimensions and Derived Units

Level 2 of the Units and Measurement GK series builds the skill of matching physical quantities to their SI units, prefixes and dimensions. Questions use match-the-list, ordering, odd-one-out and statement formats on base and derived units, astronomical distances and atomic-scale lengths. Every answer on Aptitude360 comes with an explanation, so you can see the reasoning behind each unit relation.

What this Level 2 units and measurement quiz tests

• Correct pairing of base quantities with their SI units and unit symbols
• Telling base units from derived units, and spotting non-SI or derived units in odd-one-out questions
• Derived units for force, work, pressure, power and frequency
• Ordering prefixes such as nano, milli, kilo and mega by value
• Arranging lengths from fermi and angstrom up to astronomical unit, light year and parsec
• Dimensional formulas of force, velocity and work, and the need for standard units

Key formulas and dimension rules for Level 2

• Dimensions of velocity: \( [\text{L}\text{T}^{-1}] \)
• Dimensions of work and energy: \( [\text{M}\text{L}^{2}\text{T}^{-2}] \)
• Fermi: \( 1\,\text{fm}=10^{-15}\,\text{m} \)
• Angstrom: \( 1\,\mathring{\text{A}}=10^{-10}\,\text{m} \)
• Unified atomic mass unit: \( 1\,\text{u}=\dfrac{1}{12}\times m_{\text{C-12}} \)

How to prepare for ordering and matching questions on units

• Remember the large-distance ladder: astronomical unit, then light year, then parsec
• Derive a dimensional formula from the defining equation, such as force equals mass times acceleration, instead of memorising it
• Practise rewriting derived units in base units, which helps eliminate wrong options in matching questions

Who should take this intermediate set

It is meant for General Awareness Physics learners who have finished the basics and want firmer command of unit relations, dimensions and ordering questions.