451. Which compound is the primary constituent of lime?
a) Calcium carbonate
b) Calcium oxide
c) Calcium hydroxide
d) Calcium sulfate
View Answer
Correct answer: b) Calcium oxide
Explanation: Lime is primarily composed of calcium oxide (CaO), which is obtained through the calcination of calcium carbonate.
452. What is the common term for calcium hydroxide, the compound produced when lime reacts with water?
a) Quicklime
b) Slaked lime
c) Hydraulic lime
d) Dolomitic lime
View Answer
Correct answer: b) Slaked lime
Explanation: When lime reacts with water, it produces calcium hydroxide, which is commonly known as slaked lime.
453. Which type of lime can set and harden under water?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Hydraulic lime
Explanation: Hydraulic lime has the ability to set and harden under water, making it suitable for underwater applications and in damp conditions.
454. Which type of lime is obtained through the calcination of limestone without any additives?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: a) Fat lime
Explanation: Fat lime, also known as non-hydraulic lime, is obtained through the calcination of limestone without any additives.
455. Which type of lime is commonly used for historic preservation and restoration work?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Hydraulic lime
Explanation: Hydraulic lime is commonly used for historic preservation and restoration work due to its compatibility with traditional lime-based materials.
456. Which type of lime has higher strength and sets faster compared to fat lime?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Hydraulic lime
Explanation: Hydraulic lime has higher strength and sets faster compared to fat lime. It possesses hydraulic properties that allow it to harden even in the presence of water.
457. Which type of lime is obtained through the calcination of a mixture of limestone and clay?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Hydraulic lime
Explanation: Hydraulic lime is obtained through the calcination of a mixture of limestone and clay, which provides it with its hydraulic properties.
458. Which type of lime is commonly used for the preparation of lime mortar and lime plaster?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Hydraulic lime
Explanation: Hydraulic lime is commonly used for the preparation of lime mortar and lime plaster due to its ability to set and harden in the presence of water.
459. Which type of lime is commonly used for soil stabilization and improving the engineering properties of soils?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: b) Hydraulic lime
Explanation: Hydraulic lime is commonly used for soil stabilization and improving the engineering properties of soils due to its ability to react with clay minerals and improve their properties.
460. Which type of lime is commonly used in the production of lime-based paints and pigments?
a) Fat lime
b) Hydraulic lime
c) Dolomitic lime
d) Slaked lime
View Answer
Correct answer: a) Fat lime
Explanation: Fat lime is commonly used in the production of lime-based paints and pigments due to its low hydraulicity and ability to produce a fine white powder.
