GATE CE topic:construction-materials-management PYQs & Answers — Page 2

Questions 11–20 of 46. Imported answers require independent review unless marked reviewed.

The elements that DO NOT increase the strength of structural steel are

Your answerSelect all correct options. You can choose more than one.

Carbon

Manganese

Sulphur

Chlorine

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A critical activity in a project is estimated to take 15 days to complete at a cost of Rs. 30,000. The activity can be expedited to complete in 12 days by spending a total amount of Rs. 54,000. Consider the statements P and Q.

P: It is economically advisable to complete the activity early by crashing, if the indirect cost of the project is Rs. 8,500 per day.

Q: It is economically advisable to complete the activity early by crashing, if the indirect cost of the project is Rs. 10,000 per day.

Which one of the following options is CORRECT?

Your answerChoose one option.

Both P and Q are TRUE

P is TRUE and Q is FALSE

Both P and Q are FALSE

P is FALSE and Q is TRUE

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The expression for computing the effective interest rate (

) using continuous compounding for a nominal interest rate of 5% is

The effective interest rate (in percentage) is __________ (rounded off to 2 decimal places).

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The initial cost of an equipment is Rs. 1,00,000. Its salvage value at the end of accounting life of 5 years is Rs. 10,000. The difference in depreciation (in Rs.) computed using ‘double-declining balance method’ and ‘straight line method’ of depreciation in Year-2 is __________ (in positive integer).

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The table shows the activities and their durations and dependencies in a project.

Activity	Duration (Days)	Depends on
A	8	-
B	4	A
C	4	B
D	4	C, L
F	4	A
G	4	F
H	6	G, L
K	10	A
L	6	F, K

The total duration (in days) of the project is ________ (in integer).

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In cement concrete mix design, with the increase in water-cement ratio, which one of the following statements is TRUE?

Your answerChoose one option.

Compressive strength decreases but workability increases

Compressive strength increases but workability decreases

Both compressive strength and workability decrease

Both compressive strength and workability increase

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Which of the following equations is correct for the Pozolanic reaction?

Your answerChoose one option.

Ca(OH)₂ + Reactive Superplasticiser + H₂O → C-S-H

Ca(OH)₂ + Reactive Silicon dioxide + H₂O → C-S-H

Ca(OH)₂ + Reactive Sulphates + H₂O → C-S-H

Ca(OH)₂ + Reactive Sulphur + H₂O → C-S-H

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Match all the possible combinations between Column X (Cement compounds) and Column Y (Cement properties):

Column X	Column Y
(i) C₃S	(P) Early age strength
(ii) C₂S	(Q) Later age strength
(iii) C₃A	(R) Flash setting
	(S) Highest heat of hydration
	(T) Lowest heat of hydration

Which one of the following combinations is correct?

Your answerChoose one option.

(i) - (P), (ii) - (Q) and (T), (iii) - (R) and (S)

(i) - (Q) and (T), (ii) - (P) and (S), (iii) - (R)

(i) - (P), (ii) - (Q) and (R), (iii) - (T)

(i) - (T), (ii) - (S), (iii) - (P) and (Q)

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The project activities are given in the following table along with the duration and dependency.

Activities	Duration (days)	Depends on
P	10	-
Q	12	-
R	5	P
S	10	Q
T	10	P, Q

Which one of the following combinations is correct?

Your answerChoose one option.

Total duration of the project = 22 days, Critical path is Q → S

Total duration of the project = 20 days, Critical path is Q → T

Total duration of the project = 22 days, Critical path is P → T

Total duration of the project = 20 days, Critical path is P → R

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The activities of a project are given in the following table along with their durations and dependency.

Activities	Duration (days)	Depends on
A	10	-
B	12	-
C	5	A
D	14	B
E	10	B, C

The total float of the activity E (in days) is ________. (in integer)

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GATE CE topic:construction-materials-management PYQs

Question 29

Question 38

Question 47

Question 51

Question 52

Question 15

Question 15

Question 15

Question 39

Question 53