Top 250+ Solved Advanced Construction Technology MCQ Questions Answer

From 31 to 45 of 212

Q. Which one is use as retarders?

a. gypsum

b. sugars

c. cellulose products

d. all of the above

  • d. all of the above

Q. Normally………….. gypsum is used in concrete.

a. 2% to 4%

b. 2% to 8%

c. 2% to 9%

d. 3% to 4%

  • a. 2% to 4%

Q. Which one of these is used as air entraining agent in concrete?

a. natural wood resins

b. animal fats

c. vegetable fats

d. all of the above

  • d. all of the above

Q. By adding air inside a concrete ……………

a. improve workability

b. reeducation in strength

c. reduce permeability

d. all of the above

  • d. all of the above

Q. Which admixture is used for bonding between old and new surface of concrete?

a. accelerating admixture

b. retarding admixture

c. plasticizers

d. bonding admixture

  • d. bonding admixture

Q. Higher dose of the super plasticizers causes…………

a. effect on shrinkage properties

b. effect on creep properties

c. a & b both

d. creates a cracks

  • c. a & b both

Q. Optimum air content in concrete is………..

a. 3% to 6%

b. 4% to 6%

c. 3% to 7%

d. 3% to 4%

  • a. 3% to 6%

Q. Flyash is a byproduct of

a. aluminum plant

b. power plant

c. silica furnace

d. fertilizer plant

  • b. power plant

Q. What is efficiency factor of silica fume in high water cement ratio concrete?

a. 3 to 4

b. 3 to 9

c. 3 to 10

d. 2 to 7

  • a. 3 to 4

Q. What is density of the undensified silica fume? (in kg/m3)

a. 200 to 340

b. 200 to 800

c. 200 to 300

d. 100 to 170

  • c. 200 to 300

Q. Blast furnace slag is by product of……….

a. pig iron plant

b. power plant

c. silica furnace

d. fertilizer plant

  • a. pig iron plant

Q. Blast furnace slag contain……….

a. lime

b. silica

c. alumina

d. all of the above

  • d. all of the above

Q. Portland slag cement is used for………..

a. mass concrete work

b. marine works

c. hot weather concreting

d. all of the above

  • d. all of the above
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