Back to MECHANICAL PROPERTIES OF FLUIDS

Your Progress

0 / 5 Answered

Correct

Incorrect

Accuracy

JEE • PHYSICS • MECHANICAL PROPERTIES OF FLUIDS

Mechanical properties of fluids practice · Hard

Try a question, then open “View answer” to check it. Sign in to submit answers and save progress.

Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

Take a chapter quiz →

1 Hard

1 of 5

Remembering +4 | -1

The onset of turbulence in a liquid is determined by

View answer and explanation

Correct option: C

Reynold’s number

Option C is correct. The Reynolds number is a dimensionless quantity that predicts the onset of turbulence in a fluid flow.

2 Hard

2 of 5

Application +4 | -1

A stone of mass

10 \mathrm{~kg}

is lying at the bed of a large lake

10 \mathrm{~m}

deep. If the relative density of the stone is 2, the amount of work done by external force to bring slowly it at the surface of the lake will be (neglect all resistive forces)

View answer and explanation

Correct option: A

490 \mathrm{~J}

Option A (

490 \mathrm{~J}

) is correct because it is the work done against the net weight (weight - buoyant force) to lift the stone to the surface.

3 Hard

3 of 5

Application +4 | -1

Eight identical drops of water, each of radius

2 \mathrm{~mm}

are falling through air at a terminal velocity of

8 \mathrm{~cm} \mathrm{~s}^{-1}.

If they coalesce to form a single drop, then the terminal velocity of combined drop will be:

View answer and explanation

Correct option: A

32 \mathrm{~cm} \mathrm{~s}^{-1}

Option A (

32 \mathrm{~cm} \mathrm{~s}^{-1}

) is correct because the terminal velocity is proportional to the square of the radius, and the radius doubles when eight drops coalesce.

4 Hard

4 of 5

Application +4 | -1

A body is floating in liquid with

50 \%

of its volume outside the liquid. When the entire system accelerates upwards with an acceleration

g / 3

, the percentage of its volume outside the liquid is

View answer and explanation

Correct option: B

50 \%

Option B (50 %) is correct because the percentage of the volume outside the liquid remains unchanged when the system accelerates upwards.

5 Hard

5 of 5

Understanding +4 | -1

When two capillary tubes of different diameters are dipped vertically, the rise of the liquid is

View answer and explanation

Correct option: D

Key Takeaways

✓ This set contains 5 single-correct-answer MCQs on MECHANICAL PROPERTIES OF FLUIDS.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

Continue Your Practice

📚 Switch Set (HARD)

Chapter Sets

ALL 414 MCQs EASY 19 MCQs HARD 5 MCQs MEDIUM 390 MCQs

0 /5

0✓ 0✗

0% Accuracy