| 1. | The fineness of cement is measured in terms of ? | |
|
percentage weight retained on IS sieve number 9
|
||
|
surface area in cm² per gram of the cement
|
||
|
either (a) or (b)
|
||
|
none of these
|
||
View Answer
Discuss in Forum
Report Question| 2. | Under normal circumstances, the beam soffits may be removed after ? | |
|
2 days
|
||
|
7 days
|
||
|
14 days
|
||
|
21 days
|
||
| 3. | The proportion of lime, silica, alumina and iron oxide in a good Portland cement should be ? | |
|
63:22: 6:3
|
||
|
63:22:3:6
|
||
|
22:63:6:3
|
||
|
22:63:3:6
|
||
| 4. | Plain cement concrete is strong in taking ? | |
|
tensile stress
|
||
|
compressive stress
|
||
|
shear stress
|
||
|
all of these
|
||
| 5. | If the proportions of different ingredients (cement, sand and aggregate) are in the ratio of 1:2:4, then the grade of concrete is ? | |
|
M 10
|
||
|
M 15
|
||
|
M 20
|
||
|
M 25
|
||
| 6. | If sea water is used for preparing concrete mix, it ? | |
|
reduces strength
|
||
|
corrodes steel reinforcement
|
||
|
causes efflorescence
|
||
|
all of these
|
||
| 7. | Segregation in concrete results in ? | |
|
honey combing
|
||
|
porous layers
|
||
|
surface scaling
|
||
|
all of these
|
||
| 8. | Calcareous material used in the manufacture of cement consists of ? | |
|
lime stone
|
||
|
chalk
|
||
|
shells
|
||
|
all of these
|
||
| 9. | The aggregate is said to be elongated when ? | |
|
its least dimension is three-fifth of its mean dimension
|
||
|
its least dimension is equal to its mean dimension
|
||
|
its length is equal to its mean dimension
|
||
|
its length is equal to 1.8 times its mean dimension
|
||
| 10. | Workability of concrete mix having very low water-cement ratio should be obtained by ? | |
|
flexural strength test
|
||
|
slump test
|
||
|
compaction factor test
|
||
|
any one of these
|
||