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Units and Measurement – GK Quiz with Answers – Level 1

Beginner-level GK on SI base and derived units, prefixes from nano to mega, the fermi, angstrom and light year, and simple dimensional formulas, each answer explained.

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Questions, answer key and solutions.

Questions
50
Duration
25 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 25-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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How the two modes differ
No account needed

Normal

Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 25 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Units and Measurement GK Practice Quiz Level 1: SI Units and Prefixes

This is a Level 1 General Awareness Physics quiz on units and measurement, covering the SI base units, common derived units, metric prefixes and special units of length. It also introduces dimensional formulas for simple quantities. Aptitude360 gives an explanation with every answer, so beginners can learn unit names, symbols and the scientists they honour.

Topics in this Units and Measurement Level 1 set

  • The SI base units for length, mass, time, temperature, amount of substance and luminous intensity
  • Derived units such as the newton, joule, watt, pascal and hertz, and the quantities they measure
  • The radian and steradian as SI derived units for plane angle and solid angle
  • Metric prefixes from nano and micro to kilo and mega
  • Very small lengths (fermi, angstrom) and very large distances (astronomical unit, light year)
  • The unified atomic mass unit, units of electrical energy and the basics of dimensional analysis

Key formulas and unit relations for Level 1

  • Newton in base units: \( 1\,\text{N}=1\,\text{kg}\,\text{m}\,\text{s}^{-2} \)
  • Pascal: \( 1\,\text{Pa}=\dfrac{1\,\text{N}}{1\,\text{m}^{2}} \)
  • Watt: \( 1\,\text{W}=\dfrac{1\,\text{J}}{1\,\text{s}} \)
  • Fermi: \( 1\,\text{fm}=10^{-15}\,\text{m} \)
  • Dimensions of force: \( [\text{M}\text{L}\text{T}^{-2}] \)

Revision tips for SI units and prefixes

  • Learn each derived unit with its namesake scientist, for example the pascal with Blaise Pascal and the hertz with Heinrich Hertz
  • Write the prefixes on one line in increasing order of power of ten so value-matching questions take seconds
  • Remember that the light year measures distance, not time, a common trap in GK papers

Who this beginner set is for

It suits students starting General Awareness Physics for competitive exams who want a quick check on unit basics before moving to harder levels.

FAQs about Units and Measurement – GK Quiz with Answers – Level 1

How many base units are there in the SI system?
There are seven SI base units: metre (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance) and candela (luminous intensity).
What is the SI unit of force?
The SI unit of force is the newton. One newton is the force that gives a mass of one kilogram an acceleration of one metre per second squared.
Is a light year a unit of time or distance?
A light year is a unit of distance. It is the distance light travels in vacuum in one year, about 9.46 trillion kilometres.
What is dimensional analysis used for?
Dimensional analysis is used to check whether a physical equation is dimensionally correct, to convert units from one system to another and to derive relations between physical quantities.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Units and Measurement GK Level 15025 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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