How does the bulk modulus of elasticity behave physically___________________?
Show answer Hide answer
Answer: B. increases with pressure
Explanation
The bulk modulus of elasticity measures a fluid resistance to compression and increases as the surrounding fluid pressure increases. As fluids are compressed under higher pressures, their molecular spacing decreases, making them progressively harder to compress further. Mathematical property formulations confirm that bulk modulus is directly proportional to operating pressure levels in liquids. Bulk modulus of elasticity is defined as the ratio of pressure increase to the resulting relative decrease in fluid volume. Liquids are generally considered incompressible, but high-pressure applications reveal measurable changes in their bulk modulus. Higher bulk modulus values indicate stiffer, less compressible fluids under mechanical compressive loads.
Bulk modulus has the dimensions of pressure rather than the inverse dimensions of pressure. A fluid is less compressible when its bulk modulus is large, making direct compressibility scale inversely with modulus. Bulk modulus is an intrinsic thermodynamic property of fluids and is independent of dynamic flow velocity or viscosity.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What essential electrical component is required to generate high-voltage ignition sparks in a battery-powered petrol engine_______________?
Show answer Hide answer
Answer: B. ignition coil and distributor
Battery-powered petrol engines operate on low primary circuit voltage that cannot bridge spark plug gaps. An ignition coil steps up the battery voltage to thousands of volts required for firing sparks. A distributor then...
Q2. A compressor has a capacity rating of 5 m/min. What does this 5 m/min measurement indicate_______________?
Show answer Hide answer
Answer: B. free air
Compressor capacity ratings are conventionally expressed in terms of free air delivered under ambient atmospheric conditions. Free air standardizes volumetric output measurements regardless of intake temperature, humidit...
Q3. What is the designated firing sequence in a six-stroke internal combustion engine_________________?
Show answer Hide answer
Answer: E. 1-5-3-4-2-6
Multi-cylinder engine configurations utilize designated firing orders such as one-five-three-four-two-six to balance inertia forces. Firing sequences determine the precise timing of power strokes across engine cylinders...
Q4. What fundamental fluid mechanics principle is expressed by the continuity equation__________________?
Show answer Hide answer
Answer: C. conservation of mass
The continuity equation relates fluid velocity, cross-sectional area, and density throughout a flow field. It ensures that mass is neither created nor destroyed as a fluid moves through pipes or channels. Mathematically,...
Q5. What is fluid flow called when particle velocities fluctuate unpredictably in both magnitude and direction from point to point and instant to instant__________________?
Show answer Hide answer
Answer: D. turbulent flow
Turbulent flow features chaotic fluid particle velocity fluctuations occurring unpredictably in both magnitude and direction. Fluid particles mix violently across adjacent layers, creating eddies, vortices, and high inte...
Q6. Under what flow conditions does the continuity equation remain valid____________________?
Show answer Hide answer
Answer: D. all of the above
The standard one-dimensional continuity equation applies when flow is steady, one-dimensional, and velocity is uniform across cross-sections. These simplifying assumptions allow fluid dynamicists to equate mass flow rate...