371. Which factor can impact the quality of lime produced?
a) Temperature during calcination
b) Color of limestone
c) Particle size of sand
d) pH of water used for hydration
View Answer
Correct answer: a) Temperature during calcination
Explanation: The temperature during the calcination process can impact the quality of lime produced. The proper temperature ensures the desired chemical reactions and properties.
372. Which technique is commonly used for applying lime plaster to walls?
a) Troweling
b) Spraying
c) Brushing
d) Roller application
View Answer
Correct answer: a) Troweling
Explanation: Troweling is commonly used for applying lime plaster to walls. The lime plaster is applied with a trowel and then smoothed and leveled to achieve the desired finish.
373. Which type of lime is commonly used for mortars exposed to water or high humidity?
a) Hydraulic lime
b) Quicklime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: a) Hydraulic lime
Explanation: Hydraulic lime is commonly used for mortars exposed to water or high humidity as it can set and harden underwater or in damp conditions.
374. Which type of lime is commonly used as a flux in steel production?
a) Hydraulic lime
b) Quicklime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Quicklime
Explanation: Quicklime is commonly used as a flux in steel production, where it helps remove impurities and improve the quality of the steel.
375. Which technique is commonly used for the preservation and conservation of historic lime-based structures?
a) Lime rendering
b) Lime pointing
c) Lime washing
d) Lime grouting
View Answer
Correct answer: b) Lime pointing
Explanation: Lime pointing is commonly used for the preservation and conservation of historic lime-based structures. It involves repairing and repointing the joints between masonry using lime mortar.
376. Which property of lime makes it effective in reducing the risk of mold growth?
a) Antimicrobial
b) Insulating
c) Adhesive
d) Fire-resistant
View Answer
Correct answer: a) Antimicrobial
Explanation: Lime possesses antimicrobial properties, making it effective in reducing the risk of mold growth on surfaces where it is applied.
377. Which type of lime is commonly used in soil stabilization for road construction?
a) Hydraulic lime
b) Quicklime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: a) Hydraulic lime
Explanation: Hydraulic lime is commonly used in soil stabilization for road construction to improve the strength and stability of the soil.
378. Which technique is commonly used for repairing cracks in lime-based structures?
a) Lime rendering
b) Lime pointing
c) Lime washing
d) Lime grouting
View Answer
Correct answer: d) Lime grouting
Explanation: Lime grouting is commonly used for repairing cracks in lime-based structures. It involves injecting lime mortar into the cracks to restore the structural integrity.
379. Which factor can impact the setting time of lime mortar?
a) Sand particle size
b) Ambient temperature
c) Lime-to-water ratio
d) Type of aggregate used
View Answer
Correct answer: c) Lime-to-water ratio
Explanation: The lime-to-water ratio can impact the setting time of lime mortar. Increasing or decreasing the ratio can affect the rate of the hydration process.
380. Which type of lime is commonly used as a flux in the production of glass?
a) Hydraulic lime
b) Quicklime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Quicklime
Explanation: Quicklime is commonly used as a flux in the production of glass. It helps lower the melting point of the glass mixture.
