When measuring dynamic strain, the Wheatstone bridge configuration utilized is of the ______________ type?
Show answer Hide answer
Answer: B. Voltage sensitive deflected
Explanation
Dynamic strain measurements require electronic sensors capable of tracking rapid surface deformations. Strain gauges change their electrical resistance when subjected to mechanical tension or compression. A voltage-sensitive deflected Wheatstone bridge converts these resistance changes into measurable voltage signals. Wheatstone bridge circuits are electrical networks used for measuring unknown electrical resistances accurately. Deflected bridge configurations produce an output voltage proportional to the applied strain level. Dynamic testing requires high-frequency response amplifiers to capture transient mechanical vibrations.
Aerospace engineers use dynamic strain gauges to monitor wing vibrations during flight testing. Automotive crash test dummies are equipped with strain sensors to measure impact forces. Structural health monitoring systems rely on bridge circuits to detect fatigue cracks in bridges. Option A describes a null-balance bridge used mainly for precise static resistance measurements. Option C describes a current-sensitive circuit, whereas modern data acquisition systems use voltage sensing. Option D is incorrect because voltage-sensitive deflected bridges are standard for dynamic strain.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. For a modest toy manufacturing shop with fixed monthly overheads of Rs. 5000/-, a variable cost of Rs. 20 per toy, and a selling price of Rs. 30 per unit, the monthly break-even production level will be _________________ toys?
Show answer Hide answer
Answer: B. 500
The break-even production level occurs when total revenues exactly equal total operational costs. It is calculated by dividing fixed overhead expenses by the contribution margin per unit. Subtracting the variable cost of...
Q2. During the sensible heating of humid air__________________?
Show answer Hide answer
Answer: D. Both B & C
Sensible heating of humid air adds thermal energy without changing its moisture content. Because the moisture content remains constant, the corresponding dew point temperature does not change. Adding heat raises both the...
Q3. Fog serves as a classic illustration of a colloidal dispersion consisting of___________________?
Show answer Hide answer
Answer: C. Liquid dispersed in gas
A colloidal system consists of microscopic particles suspended evenly throughout another substance. Fog is specifically classified as a colloid where liquid droplets are dispersed in a gas. Tiny liquid water droplets rem...
Q4. The fire refining technique is implemented in the purification of___________________?
Show answer Hide answer
Answer: B. Copper
Fire refining is an established pyrometallurgical purification technique used in metallurgy. It is traditionally implemented to remove residual impurities from crude blister copper. Oxidation and slagging processes elimi...
Q5. For optimal blast furnace performance, Wustite (FeO) reduction should reach an extent of___________________?
Show answer Hide answer
Answer: C. 50-60% indirect reduction
Blast furnace ironmaking involves complex reduction reactions of iron oxides at high temperatures. Wustite reduction to metallic iron must achieve an optimal balance of indirect and direct methods. Approximately fifty to...
Q6. For two infinite parallel planes having emissivities ε1 and ε2, the radiation interchange factor from surface 1 to surface 2 is expressed as__________________?
Show answer Hide answer
Answer: B. ε1.ε2/(ε1 + ε2 – ε1.ε2)
Radiation heat transfer between surfaces depends on their geometric orientation and surface emissivity. For two infinite parallel gray planes, radiation exchange is governed by a specific formula. The correct interchange...