16. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per m² of steel strip.
A. 5-10
B. 1000-1500
C. 120-500
D. 1500-3000
✅ The correct answer is option C.
18. __________ strain gauge is the most sensitive sensing element for strain measurement.
A. Photoelastic
B. Semiconductor
C. Wire resistance
D. None of these
✅ The correct answer is option B.
20. In order to protect the aquatic creatures, the dissolved oxygen content in fresh water stream should never be less than __________ PPm.
A. 0.5
B. 1
C. 5
D. 20
✅ The correct answer is option C.
22. Colour comparator is used to measure the
A. PH value
B. Electrode potential
C. Colour intensity
D. None of these
✅ The correct answer is option A.
24. Moist climate is the most favourable factor in the site selection far a
A. Steel plant
B. Textile factory
C. Petroleum refinery
D. Coke oven battery
✅ The correct answer is option B.
26. Titanium can be easily welded using __________ welding.
A. Submerged arc
B. TIG
C. Shielded metal arc
D. Electroslag
✅ The correct answer is option B.
28. Presence of nickel & chromium in steel does not raise its
A. Elastic limit
B. Machining properties
C. Ductility
D. Resilience
✅ The correct answer is option A.
30. Limestone is added in the blast furnace (during pig iron manufacture) to
A. Form slag by combining with impurities
B. Supply heat by undergoing exothermic reaction with impurities
C. Reduce the coke consumption
D. Reduce slag viscosity
✅ The correct answer is option A.
32. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its
A. Aqueous tension
B. Saturated humidity
C. Vapor pressure
D. Absolute humidity
✅ The correct answer is option A.
34. Desert air coolers being rendered ineffective in rainy season is due to
A. Low humidity
B. Low temperature
C. High humidity
D. Sunny weather
✅ The correct answer is option C.