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SUNDAY WEEKLY EXAM (22/06/2025)

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SUNDAY WEEKLY EXAM (22/06/2025)
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126 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Numerical: Calculate the amount of gel water required for 400 kg of cement. Assume gel water = 15% of cement weight.

60 kg
40 kg
80 kg
100 kg

Answer explanation

Gel water = 15% of 400 kg = 0.15*400 = 60 kg.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Assertion (A): Using saline water in RCC can cause corrosion. Reason (R): Chlorides in saline water react with cement to increase strength.

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
A is false but R is true

Answer explanation

Saline water causes corrosion due to chlorides; these do not improve strength but damage reinforcement.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Bulking of sand occurs due to:

Presence of fine particles
Absorption of water increasing volume
Reduction in void ratio
Loss of cement content

Answer explanation

Bulking occurs when moisture forms a film around particles, increasing their volume.

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Obligatory points in highway alignment include:

Only religious places and costly structures
Only points through which road must pass
Points through which road must or must not pass
Only low-lying water bodies

Answer explanation

Obligatory points refer to constraints in alignment; both points to pass and to avoid.

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which component of a steel truss resists tension primarily?

Bottom chord
Top chord
Diagonals
Vertical members

Answer explanation

Bottom chord members in trusses are generally in tension and resist tensile forces.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which process reduces sludge volume significantly?

Sludge digestion
Filtration
Sedimentation
Coagulation

Answer explanation

Digestion stabilizes organic matter and reduces volume.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which pollutant causes blue baby syndrome?

Nitrate
Fluoride
Lead
Iron

Answer explanation

High nitrate in water is toxic for infants.

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