NEET UG Properties of Matter & Heat: Mechanical Properties of Fluids – Chapter Test
NEET UG Properties of Matter & Heat: Mechanical Properties of Fluids – Chapter Test is an online chapter test in the NEET UG pattern, covering Properties of Matter & Heat. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Properties of Matter & Heat | 20 |
Difficulty: 7 medium · 13 hard
Mechanical Properties of Fluids MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. Two spherical drops of the same liquid, having radii in the ratio 1 : 2, fall through a viscous medium and each attains its terminal velocity. The ratio of their terminal velocities is:
एक ही द्रव की दो गोलाकार बूँदें, जिनकी त्रिज्याओं का अनुपात 1 : 2 है, एक श्यान माध्यम में गिरती हैं तथा प्रत्येक अपना सीमांत वेग प्राप्त कर लेती है। उनके सीमांत वेगों का अनुपात है:
- A. 1 : 4
- B. 2 : 1
- C. 1 : 2
- D. 1 : 8
Solution
Terminal velocity varies as the square of the radius, v_t = (2/9)r²(ρ−σ)g/η. Hence the ratio is 1² : 2² = 1 : 4.
सीमांत वेग त्रिज्या के वर्ग के अनुक्रमानुपाती होता है, v_t = (2/9)r²(ρ−σ)g/η। अतः अनुपात 1² : 2² = 1 : 4 है।
Q2. In a hydraulic press the cross-sectional areas of the smaller and larger pistons are in the ratio 1 : 25. If a force of 40 N is applied to the smaller piston, the maximum load that can be supported on the larger piston (friction neglected) is:
एक हाइड्रॉलिक प्रेस में छोटे और बड़े पिस्टनों के अनुप्रस्थ-काट क्षेत्रफलों का अनुपात 1 : 25 है। यदि छोटे पिस्टन पर 40 N का बल लगाया जाता है, तो बड़े पिस्टन पर अधिकतम कितना भार (घर्षण को नगण्य मानते हुए) सँभाला जा सकता है:
- A. 40 N
- B. 1000 N
- C. 200 N
- D. 625 N
Solution
By Pascal's law the pressure is transmitted equally, so F₂ = F₁ × (A₂/A₁) = 40 × 25 = 1000 N.
पास्कल के नियम के अनुसार दाब समान रूप से संचारित होता है, अतः F₂ = F₁ × (A₂/A₁) = 40 × 25 = 1000 N।
Q3. Consider the following statements about Bernoulli's theorem for fluid flow: 1. It is a statement of the conservation of energy for a flowing fluid. 2. It is strictly valid only for incompressible, non-viscous fluids undergoing steady (streamline) flow. 3. In the Bernoulli equation the term ρgh represents the pressure energy per unit volume. Which of these statements is/are correct?
द्रव प्रवाह के लिए बरनौली प्रमेय के बारे में निम्नलिखित कथनों पर विचार कीजिए: 1. यह एक प्रवाहित द्रव के लिए ऊर्जा संरक्षण का एक कथन है। 2. यह केवल असंपीड्य, अश्यान द्रवों के लिए, जो स्थायी (धारारेखीय) प्रवाह में हों, कठोरता से मान्य है। 3. बरनौली समीकरण में ρgh पद प्रति एकांक आयतन दाब ऊर्जा को निरूपित करता है। इनमें से कौन-सा/से कथन सही है/हैं?
- A. 1 and 3 only / केवल 1 और 3
- B. 1 and 2 only / केवल 1 और 2
- C. 1, 2 and 3 / 1, 2 और 3
- D. 2 and 3 only / केवल 2 और 3
Solution
Statements 1 and 2 are correct. Statement 3 is wrong: ρgh is the potential (gravitational) energy per unit volume, whereas the pressure term P itself represents the pressure energy per unit volume.
कथन 1 और 2 सही हैं। कथन 3 गलत है: ρgh प्रति एकांक आयतन स्थितिज (गुरुत्वीय) ऊर्जा है, जबकि दाब पद P स्वयं प्रति एकांक आयतन दाब ऊर्जा को निरूपित करता है।
Frequently asked questions
How many questions are in the NEET UG Properties of Matter & Heat: Mechanical Properties of Fluids – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Properties of Matter & Heat: Mechanical Properties of Fluids – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Properties of Matter & Heat: Mechanical Properties of Fluids – Chapter Test cover?
Properties of Matter & Heat (20 questions).
Is the NEET UG Properties of Matter & Heat: Mechanical Properties of Fluids – Chapter Test free?
It is part of the NEET UG 2027 Mock Test Series (134 tests, ₹299). You can first try Biology in Human Welfare – Topic Test for free.
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