Construction Materials & Management Test 1

Question 1
2 / -0.33

If D is the duration, ES and EF are the earliest start time and earliest finish time, LS and LF are the latest start time and latest finish time, then the following relation(s) hold(s) good :
A. EF = ES + D
B. LS = LF – D
C. D = EF – ES
Select the code for the correct answer from the options given below :

A
A and C only

B
A and B only

C
C only

D
A,B,C

Question 2
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Purchasing cost of a new machine is 8 Lacs. Salvage value after expected life of 3 year is 1 Lacs. The rate of depreciation using constant rate of declining balance method is

A
0.25

B
0.30c

C
0.40

D
0.50

Question 3
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Which of the following statements are true

A
Tests on cement paste to determine initial and final setting times are done at normal consistency condition.

B
Low heat cement has a Low percentage of tri-calcium aluminate.

C
High early strength Portland cement contains a larger percentage of tri-calcium silicate and a lower percentage of di-calcium silicate.

D
High early strength Portland cement contains a larger percentage of di-calcium silicate and a lower percentage of tri-calcium silicate.

Question 4
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What is carbon content (%) in mild steel?

A
2.0 – 3.0

B
0.5 – 0.8

C
0.05 – 0.1

D
0.15 – 0.3

Question 5
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Consider the following data for concrete with mild exposure:
Water-cement ratio = 0.50
Water = 191.6 litre
The required cement content will be

A
561 kg/m³

B
472 kg/m³

C
383 kg/m³

D
294 kg/m³

Question 6
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If creep coefficient for concrete at 7 days is k₁ and at 28 days is k₂ then

A
k₁ > k₂

B
k₁ < k₂

C
k₁ = k₂

D
k₁ ≤ k₂

Question 7
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Which of the following sentences is CORRECT in the case of cement?

A
Excess of sulphur trioxide will cause unsoundness in cement

B
Alumina is responsible for false set

C
Felite has highest rate of hydration

D
C-S-H gel also known as singenite gel

Question 8
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The salvage value of any equipment is Rs.1000 and after five years of its use, its book value after two years of its useful life is Rs.6400. The original cost of the equipment is

A
5000

B
7000

C
9000

D
10000

Question 9
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Consider the following forms of water in a hydrated cement paste:
1. Capillary water
2. Chemically combined water
3. Interlayer water
4. Adsorbed water
Which of the above forms of water will on its/their removal, cause shrinkage of the paste?

A
1, 2 and 3

B
1, 2 and 4

C
2, 3 and 4

D
1, 3 and 4

Question 10
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For increasing the workability of concrete, it is necessary to

1. Increase the quantity of Sand

2. Decrease the quantity of sand

3. Use Rounded aggregate

4. Alter the proportion of fine and coarse aggregates

Which of the following statements are correct

A
All statements are true

B
Both Statement 2 and 4

C
Statement 3

D
Both Statement 2 and 3

Question 11
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The time estimates in days are obtained from four contractors P, Q, R, S for executing a particular job are as under
Contractor
Optimistic time
(t₀)
Most likely time
(t_m)
Pessimistic time
(t_P)
P
5
10
13
Q
6
9
12
R
5
10
14
S
4
10
13

A
Contractor Q is more certain about completing the project in time.

B
Contractor P is more certain about completing the project in time.

C
Expected Completion time by Contractor P is 9.67 days

D
Expected Completion time by Contractor Q is 9 days

Question 12
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A construction equipment was purchased in Rs. 12000. Assuming its salvage value at the end of 6 years to be Rs. 3000, and annual sinking percentage is 4%. Determine the difference of the amount of depreciation (in rupees) determined by straight-line method and sinking fund method for each year.

A
143-144

B
1434-1441

C
1437-1446

D
1439-1442

Question 13

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Match the following:

A)	Cost plus percentage rate contract	i)	Unit Price contract
B)	Labour contract	ii)	Above or below percent
C)	Percentage Rate contract	iii)	Actual cost plus added percentage
D)	Item Rate contract	iv)	Labour cost excluding materials

A – (iii) B – (i) C – (iv) D – (iii)

A – (iii) B – (ii) C – (i) D – (iv)

A – (iii) B – (iv) C – (ii) D – (i)

B – (iv) A – (iii) C – (ii) D – (i)

Question 14
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A PERT network diagram in the form of a line diagram with optimistic time, pessimistic time and most likely time of the activity are given below in the table:
Activity Optimistic Time Pessimistic Time Most Likely Time
P - Q 4 10 7
Q - R 6 10 8
R - S 9 15 15
S - T 8 11 8

All the data in the table are in days. The Probable range of total duration will be

A
34.2 to 46.2

B
32.6 to 42.4

C
34.8 to 45.8

D
32.4 to 44.5

Question 15
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By using a mix design procedure, mix proportions for the desired grade of concrete have been obtained as 1 : 2.2 : 3.6 (by mass) with water cement ratio of 0.55. To make 0.40 m³ of concrete the weight of cement required is ______kg.
Assume air content to be 0% and specific gravity of cement, sand and aggregate were 3.15, 2.65 and 2.7 respectively.

A
131-133

B
1314-1331

C
1317-1336

D
1319-1332

Submit Test

Contractor	Optimistic time (t₀)	Most likely time (t_m)	Pessimistic time (t_P)
P	5	10	13
Q	6	9	12
R	5	10	14
S	4	10	13

Activity	Optimistic Time	Pessimistic Time	Most Likely Time
P - Q	4	10	7
Q - R	6	10	8
R - S	9	15	15
S - T	8	11	8

Construction Ma...

Question 1

A and C only

A and B only

C only

A,B,C

Question 2

0.25

0.30c

0.40

0.50

Question 3

Tests on cement paste to determine initial and final setting times are done at normal consistency condition.

Low heat cement has a Low percentage of tri-calcium aluminate.

High early strength Portland cement contains a larger percentage of tri-calcium silicate and a lower percentage of di-calcium silicate.

High early strength Portland cement contains a larger percentage of di-calcium silicate and a lower percentage of tri-calcium silicate.

Question 4

2.0 – 3.0

0.5 – 0.8

0.05 – 0.1

0.15 – 0.3

Question 5

561 kg/m3

472 kg/m3

383 kg/m3

294 kg/m3

Question 6

k1 > k2

k1 < k2

k1 = k2

k1 ≤ k2

Question 7

Excess of sulphur trioxide will cause unsoundness in cement

Alumina is responsible for false set

Felite has highest rate of hydration

C-S-H gel also known as singenite gel

Question 8

5000

7000

9000

10000

Question 9

1, 2 and 3

1, 2 and 4

2, 3 and 4

1, 3 and 4

Question 10

All statements are true

Both Statement 2 and 4

Statement 3

Both Statement 2 and 3

Question 11

Contractor Q is more certain about completing the project in time.

Contractor P is more certain about completing the project in time.

Expected Completion time by Contractor P is 9.67 days

Expected Completion time by Contractor Q is 9 days

Question 12

143-144

1434-1441

1437-1446

1439-1442

Question 13

A – (iii) B – (i) C – (iv) D – (iii)

A – (iii) B – (ii) C – (i) D – (iv)

A – (iii) B – (iv) C – (ii) D – (i)

B – (iv) A – (iii) C – (ii) D – (i)

Question 14

34.2 to 46.2

32.6 to 42.4

34.8 to 45.8

32.4 to 44.5

Question 15

131-133

1314-1331

1317-1336

1319-1332

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Question Analysis

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561 kg/m³

472 kg/m³

383 kg/m³

294 kg/m³

k₁ > k₂

k₁ < k₂

k₁ = k₂

k₁ ≤ k₂