Quiz Part 5

The main idea of Text 1 is...

• The impact of temperature on the molecular structure of liquids.

• The distinction between Newtonian and non-Newtonian fluids and their flow characteristics.

• The principles of fluid viscosity and the factors affecting critical velocity.

• The mathematical calculation of gravity’s effect on falling spheres.

• The history of engineering designs in water and oil distribution systems.

Based on the formula provided in Text 1, the critical velocity (v_c) is...

• directly proportional to the density (ρ) of the fluid.

• inversely proportional to the Reynolds number (R).

• directly proportional to the viscosity (η) of the fluid.

• inversely proportional to the square of the pipe diameter (D).

• independent of the thickness or friction of the liquid.

According to the relationship in Text 1, if the diameter of the pipe (D) is increased while other variables stay constant, the critical velocity (v_c) will...

• increase.

• decrease.

• remain unchanged.

• fluctuate unpredictably.

• become equal to the Reynolds number.

If a liquid in a pipe is heated, the value of its critical velocity (v_c) will likely...

• decrease, provided the change in density is negligible.

• decrease, provided the density also decreases significantly.

• increase, provided the change in density is ignored.

• increase, because viscosity increases with heat.

• stay the same, as heat only affects the pipe diameter.

The relationship between pressure and Oobleck’s firmness in Text 2 is the same as the relationship between...

• Heat and ice density

• Brake pressure and car speed

• Study time and test scores

• Distance and signal strength

• Altitude and oxygen levels

Which of the following is the best restatement of this sentence: "This occurs because the large starch particles do not have time to move out of the way, causing them to jam together and create a temporary rigid structure." (Text 2, Paragraph 1)?

• Starch particles are too big to flow, so they always remain in a solid state.

• The sudden force prevents particles from shifting, leading them to clump into a firm form.

• Oobleck becomes a solid because the water evaporates quickly under high pressure.

• Rigid structures are formed when starch particles are given enough time to align.

• Moving starch particles out of the way is the only method to keep the fluid liquid.

What is the relationship between the two texts?

• Text 1 explains the general theory of fluid viscosity, while Text 2 provides a specific example of a fluid that behaves unusually.

• Text 1 discusses the benefits of Newtonian fluids, whereas Text 2 focuses on the dangers of non-Newtonian substances.

• Text 2 contradicts the scientific findings regarding temperature and flow mentioned in Text 1.

• Both texts argue that viscosity is a constant property that cannot be changed by external forces.

• Text 2 provides a chronological history of the experiments first introduced in Text 1.

The expression "stifle" in Text 1 Paragraph 2 is closest in meaning to...

• Encourage

• Suppress

• Predict

• Accelerate

• Evaluate

The purpose of Text 2 is to...

• Criticize the government for overspending on healthcare programs.

• Prove that budget deficits have no impact on long-term growth.

• Compare the healthcare systems of different developed nations.

• Advise foreign investors to withdraw their capital during a deficit.

• Explain the economic rationale and risks of investing in public health.

Based on the texts, the difference in the country’s economic outlook when implementing large-scale social programs compared to regular periods is ...

• the economic growth is significantly higher in Text 1 than the productivity gains in Text 2.

• the risk of a national credit rating downgrade is more prominent than in periods without debt.

• the liquidity of the national market becomes wider as the government increases its borrowing.

• the inflation rate stays lower even when the government fails to balance its revenue streams.

• the interest rates for private loans are lower during periods of high government deficit.