Concrete Technology (3150610) MCQs

MCQs of Hardened Concrete

Showing 1 to 10 out of 18 Questions
1.

the strength of concrete is decreased by 

(a)

vibration

(b)

impact

(c)

fatigue

(d)

all of the above 

Answer:

Option (d)

2.

the increase in strength of concrete with time is 

(a)

linear 

(b)

non-linear

(c)

asymptotic 

(d)

all of the above 

Answer:

Option (b)

3.

as per IS:456-2000, the relationship between flexural strength and characteristic strength of concrete is 

(a)

0.5 ' fck '

(b)

0.7 ' fck '

(c)

0.12 ' fck '

(d)

1.0 ' fck '

Answer:

Option (b)

4.

the approximate ratio of concrete strength at 7 days to its strength at 28 days is 

(a)

3/4

(b)

2/3

(c)

1/2

(d)

1/3

Answer:

Option (b)

5.

the shrinkage of concrete can be reduced by 

(a)

low W/C ratio

(b)

water-tight and non-absorbent formwork

(c)

presaturated aggregates 

(d)

all of the above 

Answer:

Option (d)

6.

creep coefficient of concrete at 1 year age is approximately 

(a)

1.1

(b)

2.2

(c)

3.3

(d)

4.4

Answer:

Option (a)

7.

the shrinkage of concrete is due to change in 

(a)

length 

(b)

cross-sectional area 

(c)

volume 

(d)

surface area 

Answer:

Option (c)

8.

concrete shrinkage is more pronounced in 

(a)

rich mix 

(b)

very lean mix

(c)

lean mix 

(d)

normal mix 

Answer:

Option (a)

9.

creep of the concrete is influenced by 

(a)

strength of concrete 

(b)

age of concrete 

(c)

water-cement ratio 

(d)

all of the above 

Answer:

Option (d)

10.

the ratio of ultimate creep strain to elastic strain is known as 

(a)

creep modulus 

(b)

creep coefficient 

(c)

creep strain ratio 

(d)

tertiray creep 

Answer:

Option (b)

Showing 1 to 10 out of 18 Questions