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Construction Materials(6)Construction Management(5)

Construction Materials

6 Questions

GATE→2025→Construction Materials and Management→Construction Materials

Q1

MCQ[1 Mark]

Identify the FALSE statement from the following options regarding concrete compressive strength:

(A)

Compressive strength varies depending on shape and size of specimen.

(B)

Air-dried and saturated test specimens show the same compressive strength for concrete.

(C)

Curing conditions such as temperature and humidity influence strength.

(D)

Compressive strength depends on water-to-binder ratio.

Explanation

GATE→2025→Construction Materials and Management→Construction Materials

Q2

NAT[1 Mark]

If weights retained on 2.36 mm, 1.18 mm, $600\,\mu\text{m}$, and $300\,\mu\text{m}$ sieves are 30%, 35%, 15%, and 20%, the fineness modulus is

Explanation

GATE→2024→Construction Materials and Management→Construction Materials

Q3

MCQ[1 Mark]

Concrete of characteristic strength 30 MPa is required. If 40 specimens are tested, the minimum number having at least 30 MPa strength should be

(A)

35

(B)

37

(C)

38

(D)

39

Explanation

GATE→2023→Construction Materials and Management→Construction Materials

Q4

MCQ[1 Mark]

Creep of concrete under compression is defined as the

(A)

increase in magnitude of strain under constant stress

(B)

increase in magnitude of stress under constant strain

(C)

decrease in magnitude of strain under constant stress

(D)

decrease in magnitude of stress under constant strain

Explanation

GATE→2023→Construction Materials and Management→Construction Materials

Q5

MCQ[1 Mark]

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

(A)

Compressive strength decreases but workability increases

(B)

Compressive strength increases but workability decreases

(C)

Both compressive strength and workability decrease

(D)

Both compressive strength and workability increase

Explanation

GATE→2022→Construction Materials and Management→Construction Materials

Q6

MCQ[1 Mark]

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

(A)

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

(B)

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

(C)

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

(D)

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

Explanation

Construction Management

5 Questions

GATE→2025→Construction Materials and Management→Construction Management

Q7

MSQ[2 Marks]

In the context of construction project management, which of the following statements is/are true:

(A)

A dummy activity will consume time and resources

(B)

PERT is best suited for projects with large uncertainties in activity durations

(C)

Gantt chart is commonly used for identifying critical path

(D)

Free float is time activity start can be delayed without delaying following activity

Explanation

GATE→2024→Construction Materials and Management→Construction Management

Q8

MCQ[1 Mark]

Consider statements P (Preliminary estimate used for budgeting) and Q (Detailed estimate used for controlling costs). Which option is CORRECT?

(A)

Both P and Q are TRUE

(B)

P is TRUE and Q is FALSE

(C)

Both P and Q are FALSE

(D)

P is FALSE and Q is TRUE

Explanation

GATE→2024→Construction Materials and Management→Construction Management

Q9

MCQ[1 Mark]

The figure shows formwork shores S1 to S5 for casting a cantilever RC beam. The correct sequence of removing shores is

(A)

S1 S2 S3 S4 S5

(B)

S5 S4 S3 S2 S1

(C)

S3 S2 S4 S1 S5

(D)

S3 S4 S2 S5 S1

Explanation

GATE→2024→Construction Materials and Management→Construction Management

Q10

NAT[2 Marks]

Initial cost Rs. 1,00,000, salvage value Rs. 10,000, life 5 years. Difference in depreciation (in Rs.) computed using double-declining balance and straight-line method in Year-2 is

Explanation

GATE→2022→Construction Materials and Management→Construction Management

Q11

MCQ[2 Marks]

Project activities table given. Which option correctly states total duration and critical path?

(A)

Total duration = 22 days, Critical path Q -> S

(B)

Total duration = 20 days, Critical path Q -> T

(C)

Total duration = 22 days, Critical path P -> T

(D)

Total duration = 20 days, Critical path P -> R

Explanation