Civil Engineering
GATE CE Construction Materials and Management PYQs
Build your understanding with focused practice from past exam papers.
Questions 31–40 of 46. Imported answers require independent review unless marked reviewed.
Question 8
Open questionCEMCQ1 markNeeds review
As per IS 456:2000, the pH value of water for concrete mix shall NOT be less than
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The Los Angeles test for stone aggregates is used to examine
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If the fineness modulus of a sample of fine aggregates is 4.3, the mean size of the particles in the sample is between
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Open questionCENAT1 markNeeds review
The characteristic compressive strength of concrete required in a project is 25
and the standard deviation in the observed compressive strength expected at site is 4
. The average compressive strength of cubes tested at different water-cement (
) ratios using the same material as is used for the project is given in the table. (%) | 45 | 50 | 55 | 60 |
|---|---|---|---|---|
Average compressive strength of cubes ( ) | 35 | 25 | 20 | 15 |
The water-cement ratio (in percent, round off to the lower integer) to be used in the mix is ______
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Open questionCENAT2 marksNeeds review
The network of a small construction project awarded to a contractor is shown in the following figure. The normal duration, crash duration, normal cost, and crash cost of all the activities are shown in the table. The indirect cost incurred by the contractor is INR 500 per day. If the project is targeted for completion in 16 days, the total cost (in INR) to be incurred by the contractor would be ________.
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A box measuring
is filled to the top with dry coarse aggregate of mass 187.5 kg. The water absorption and specific gravity of the aggregate are 0.5% and 2.5, respectively. The maximum quantity of water (in kg, round off to 2 decimal places) required to fill the box completely is ________.Log in to check the answer
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The setting time of cement is determined using
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The Le Chatelier apparatus is used to determine
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The deformation in concrete due to sustained loading is
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Open questionCENAT1 markNeeds review
The frequency distribution of the compressive strength of 20 concrete cube specimens is given in the table:
f (MPa) | Number of specimens with compressive strength equal to f |
|---|---|
23 | 4 |
28 | 2 |
22.5 | 5 |
31 | 5 |
29 | 4 |
If
is the mean strength of the specimens and
is the standard deviation, the number of specimens (out of 20) with compressive strength less than
is ______Log in to check the answer
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