Online Civil Engineering Test - Concrete Technology Test

Instruction:

  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
  • DO NOT refresh the page.
  • All the best!

Marks : 2/20


Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.

1.
The bulk density of aggregates does not depend upon :
size and shape of aggregates
specific gravity of aggregates
grading of aggregates
size and shape of the container
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

2.
If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is
7.30
7.35
7.40
7.45
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

3.
If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is
Your Answer: Option
(Not Answered)
Correct Answer: Option

4.
To ensure constant moisture content in aggregates
area of each aggregate pile should be large
height of each aggregate pile should not exceed 1.50 m
aggregate pile should be left for 24 hours before aggregates are used
conical heaps of aggregates should be avoided to prevent moisture variation
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

5.
M 150 grade of concrete approximates
1 : 3 : 6 mix
1 : 1 :2 mix
1 : 2 : 4 mix
1 : 1.5 : 3 mix
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

6.
The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is
30%
40%
50%
60%.
Your Answer: Option
(Not Answered)
Correct Answer: Option

7.
Hardening of cement occurs at
rapid rate during the first few days and afterwards it continues to increase at a decreased rate
slow rate during the first few days and afterwards it continues to increase at a rapid rate
uniform rate throughout its age
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

8.
The maximum thickness of concrete floor of a cement warehouse, is
10 cm
15 cm
20 cm
25 cm
30 cm
Your Answer: Option
(Not Answered)
Correct Answer: Option

9.
For compacting plain concrete road surface of thickness less than 20 cm, we use
internal vibrator
screed vibrator
form vibrator
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

10.
A construction joint is provided where
bending moment is small
shear force is small
the member is supported by other member
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

11.
Addition of pozzolana to cement
decreases workability
increases strength
increases heat of hydration
decreases curing time
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

12.
Pick up the incorrect statemnt from the following. For performing compressive strength test of cement
cement and standard sand mortar are used in the ratio of 1 : 3
water is added at the rate of + 3.0 percentage of water where P is the percentage of water for standard consistency
A cube mould of 10 cm x 10 cm x 10 cm is used
The perpared moulds are kept in a atmosphere of 50% relative humidity
The temperature of water in the submerged tank for curing moulds, should be 27° ± 2°C.
Your Answer: Option
(Not Answered)
Correct Answer: Option

13.
The most useless aggregate is one whose surface texture is
smooth
granular
glassy
honey combed and porous.
Your Answer: Option
(Not Answered)
Correct Answer: Option

14.
Pick up the correct statement from the following:
Sand stones may be divided into calcareous, siliceous and ferrugineous sand stones
Concrete using sand stones, cracks due to excessive shrinkage
Very hard and close grained crystallined lime stones are suitable aggregates but provide low strength
Broken bricks produce a concrete having good fire resisting qualities
All the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

15.
The type of aggregates of same nominal size, which contain less voids when compacted, are
rounded spherical
irregular
flaky
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

16.
If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is
2000 bags
2200 bags
2400 bags
2700 bags
3000 bags
Your Answer: Option
(Not Answered)
Correct Answer: Option

17.
Di-calcium silicate (C2S)
hydrates rapidly
generates less heat of hydration
hardens rapidly
provides less ultimate strength to cement
has less resistance to sulphate attack.
Your Answer: Option
(Not Answered)
Correct Answer: Option

18.
Pick up the incorrect statement from the following:
Workability of the concrete mix decreases with an increase in the moisture content
Concrete for which preliminary tests are conducted, is called controlled concrete
Bulking of sand depends upon the fineness of grains
Concrete mix 1 : 6 : 12, is used for mass concrete in piers.
All the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

19.
The surface where two successive placements of concrete meet, is known as
Contraction joint
Expansion joint
Construction joint
both (a) and (b)
both (6) and (c).
Your Answer: Option
(Not Answered)
Correct Answer: Option

20.
On a grading curve, the gap grading is represented by
a horizontal line
a vertical line
N.W. inclined line
N.E. inclined line
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

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