Concrete Technology (3150610) MCQs

MCQs of Fresh Concrete

Showing 1 to 10 out of 34 Questions
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1.

if the slump of concrete mix is 60mm, its workability is 

(a)

very low
(b)

low
(c)

medium
(d)

high
Answer:

Option (c)

2.

if the compacting factor of concrete mix is 0.92, its workability is 

(a)

very low 
(b)

low
(c)

medium
(d)

high
Answer:

Option (c)

3.

workability of concrete mix having very low water cement ratio should be ascertained by 

(a)

slump test 
(b)

tensile strength test 
(c)

compacting factor test
(d)

flexural strength test 
Answer:

Option (c)

4.

in slump test, each layer of concrete is compacted by a steel rod for

(a)

15 times
(b)

20 times
(c)

25 times
(d)

75 times 
Answer:

Option (c)

5.

segregation is responsible for, 

(a)

honey combed concrete
(b)

porous layer in concrete 
(c)

surface scaling in concrete
(d)

all of the above  
Answer:

Option (d)

6.

to prevent segregation, the maximum height for placing concrete is 

(a)

25 cm
(b)

50 cm
(c)

100 cm
(d)

200 cm 
Answer:

Option (c)

7.

slump test of concrete is a measure of its

(a)

compressive strength 
(b)

consistency
(c)

tensile strength
(d)

all of the above 
Answer:

Option (b)

8.

the reasonable slump for mass concrete should be 

(a)

25 - 50 mm
(b)

50 - 75 mm
(c)

75 - 100 mm
(d)

100 - 125 mm
Answer:

Option (a)

9.

workability test most suitable for concrete of very low workability is 

(a)

vee-bee test
(b)

slump test 
(c)

compaction factor test
(d)

kelly ball test
Answer:

Option (a)

10.

addition of pozzolanas in to concrete mixes improves 

(a)

workability 
(b)

resistance to chemical attack
(c)

both of the above 
(d)

none of the above 
Answer:

Option (c)

Showing 1 to 10 out of 34 Questions
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