CIVIL ENGINEERING QUIZ-BMC(cement)

CIVIL ENGINEERING QUIZ-BMC(cement)

1. The setting and hardening of cement after the addition of water occurs due to

A) Binding action of water
B) Hydration and hydrolysis of same constituent compounds of cement which act as glue
C) Evaporation of water
D) None of these

... Answer is B)
The setting and hardening of cement after the addition of water occurs due to Hydration and hydrolysis of same constituent compounds of cement which act as glue "

2. For rapid hardening cement

A) Gypsum is not added
B) Has 1 day strength same as that of 3 days ordinary protland cement
C) Is subjected to large shrinkage cracks
D) All of above

... Answer is D)
All of above"

3. Finer the cement,more is the

A) Early strength
B) Workability
C) Shrinkage cracking
D) All of above

... Answer is D)
All of above"

4. Free magnesia in cement should be less than

A) 1%
B) 2.5%
C) 4%
D) 6%

... Answer is C)
Free magnesia in cement should be less than 4%"

5. The limit specified in the indian standards for fineness of ordinary portland cement is

A) 2250 cm2/g
B) 3250 cm2/g
C) 3500 cm2/g
D) 3750 cm2/g

... Answer is A)
The limit specified in the indian standards for fineness of ordinary portland cement is 2250 cm2/g "

6. The compound which contributes the highest share of heat of hydration in cement is

A) Tricalcium silicate
B) tricalcium aluminate
C) Gypsum
D) Combined lime

... Answer is B)
The compound which contributes the highest share of heat of hydration in cement is tricalcium aluminate"

7. A slow setting cement has higher % of

A) tricalcium aluminate
B) Tricalcium silicate
C) Dicalcium silicate
D) Gypsum

... Answer is C)
A slow setting cement has higher % of Dicalcium silicate"

8. In Extra rapid hardening cement the compound added is

A) Aluminium sulphate
B) aluminium silicate
C) Calcium chloride
D) Gypsum

... Answer is C)
In Extra rapid hardening cement the compound added is Calcium chloride"

9. Approximate content of CaO in OPC is

A) 60-67%
B) 33-45%
C) 17-25%
D) 3-8%

... Answer is B)
For stone moh's scale is used to determine hardness"

10. Which of the following used as a retarder in OPC,

A) C3A
B) C4AF
C) CaSO4.2H2O
D) C2S

... Answer is C)
CaSO4.2H2O"

11. Sulphate resisting cement contains

A) High % of gypsum
B) High C3A & C4AF Content
C) High silicate content
D) High minor oxides

... Answer is C)
High silicate content"

12. The compressive strength odf cement paste depends upon

A) Gel-space ratio
B) W/C ratio by weight
C) Age of the hydrating cement paste
D) All of above

... Answer is D)
All of above"

13. Volume of 1 bag of cement weighing 50 kg is

A) 3.4 cum
B) 0.034 cum
C) 1.05 cum
D) 0.020 cum

... Answer is B)
Volume of 1 bag of cement weighing 50 kg is 0.034 cum"

14. In Portland Cement the conpound first to set after adding water is,

A) Tetra-calcium alumino -ferrite
B) Di-calcium silicate
C) Tri-calcium silicate
D) Tri-calcium aluminate

... Answer is D)
Tri-calcium aluminate"

15. For testing of compressive strength of cement, the size of cube mould is

A) 10 cm
B) 7.06 cm
C) 50 cm
D) 15 cm

... Answer is B)
For testing of compressive strength of cement, the size of cube mould is 7.06 cm"

16. Flyash is residue generated from

A) Chemical industries
B) Hydro power plants
C) Neclear power plants
D) Thermal power plants

... Answer is D)
Thermal power plants"

17. Hydrophobic cement relates with IS code of:

A) IS : 8041-1990
B) IS : 6452-1989
C) IS : 8043-1991
D) IS : 6909-1990

... Answer is C)
IS : 8043-1991 "

18. In an average, how much % water by weight of cement is required for complete hydration of portland cement?

A) 73%
B) 31%
C) 23%
D) 57%

... Answer is C)
In an average, 23 % water by weight of cement is required for complete hydration of portland cement"

19. The following compound helps in early strength of cement concrete

A) Tri calcium silicate
B) Di calcium silicate
C) Gypsum
D) Tri calcium aluminate

... Answer is A)
Tri calcium silicate"

20. For Repair of road cement used is

A) Low heat cement
B) Sulphate resistant cement
C) High alumina cement
D) Rapid hardening cement

... Answer is D)
Rapid hardening cement"