Concrete Technology (3150610) MCQs

MCQs of Fresh Concrete

Showing 11 to 20 out of 34 Questions
1 2 3 4
11.

for mass concrete works, the degree of workability should be 

(a)

low
(b)

medium 
(c)

high
(d)

very high
Answer:

Option (a)

12.

the capacity of a concrete mixer is expressed in terms of 

(a)

total volume of concrete produced per day 
(b)

total volume of concrete produced in 8 hours
(c)

total volume of concrete produced per hours 
(d)

volume of concrete mix handled per batch
Answer:

Option (d)

13.

which type of vibrator is generally used for compaction of concrete?

(a)

form vibrator 
(b)

needle vibrator
(c)

surface vibrator 
(d)

table vibrator 
Answer:

Option (b)

14.

surface vibrator is effected only when the thickness of concrete member does not exceed 

(a)

50 mm
(b)

200 mm
(c)

500 mm
(d)

800 mm
Answer:

Option (b)

15.

the water/cement ratio is expressed by 

(a)

volume 
(b)

weight
(c)

density 
(d)

none of the above 
Answer:

Option (b)

16.

the freshly prepared concrete mix should be consumed normally within 

(a)

24 hours 
(b)

8 hours 
(c)

1.5 hours
(d)

15 minutes
Answer:

Option (c)

17.

Separation of coarse aggregates from mortar during transportation, is known

(a)

bleeding
(b)

creeping
(c)

segregation
(d)

shrinkage
Answer:

Option (c)

18.

Sands of zone I are

(a)

coarse
(b)

medium 
(c)

medium to fine 
(d)

fine 
Answer:

Option (a)

19.

The size of fine aggregates does not exceed

(a)

2.75 mm
(b)

3 mm
(c)

3.75 mm
(d)

4.75 mm 
Answer:

Option (d)

20.

The main object of compaction of concrete, is:

(a)

to eliminate air holes
(b)

to achieve maximum density
(c)

to provide initimate contact between the concrete and embedded materials
(d)

all the above
Answer:

Option (d)

Showing 11 to 20 out of 34 Questions
1 2 3 4