Civil Engineering — MCQ Practice Questions & Answers

Question 1

What is the primary function of cement in concrete?

Accepted Answer

Correct answer: A. To bind aggregates together — Cement acts as a binder that hydrates and binds fine and coarse aggregates together to form a solid mass.

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B. To increase workability

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C. To reduce water absorption

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D. To improve color

Question 2

According to IS 456:2000, what is the standard cube compressive strength test age for concrete?

Accepted Answer

Correct answer: C. 28 days — IS 456:2000 specifies 28 days as the standard curing age for determining the compressive strength of concrete cubes.

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A. 7 days

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B. 14 days

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D. 56 days

Question 3

Which type of cement is used for underwater construction?

Accepted Answer

Correct answer: B. Sulphate Resisting Portland Cement — SRPC (Sulphate Resisting Portland Cement) is used for underwater and marine structures to resist sulphate attack.

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A. Ordinary Portland Cement

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C. Low Heat Portland Cement

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D. White Portland Cement

Question 4

Which of the following is NOT a type of aggregate used in concrete?

Accepted Answer

Correct answer: D. Rigid aggregate — Rigid aggregate is not a standard classification. Aggregates are classified as coarse, fine, and lightweight based on size and density.

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A. Coarse aggregate

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B. Fine aggregate

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C. Lightweight aggregate

Question 5

What is the nominal maximum size of coarse aggregate for concrete beams?

Accepted Answer

Correct answer: B. 20 mm — For reinforced concrete beams, nominal maximum coarse aggregate size is typically 20 mm to ensure proper placement around reinforcement.

Answer

A. 10 mm

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C. 40 mm

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D. 80 mm

Question 6

Which standard specifies the code of practice for plain and reinforced concrete in India?

Accepted Answer

Correct answer: B. IS 456:2000 — IS 456:2000 is the Indian Standard for plain and reinforced concrete - Code of Practice.

Answer

A. IS 383:2016

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C. IS 1199:1959

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D. IS 12269:2013

Question 7

For a M25 grade concrete, what is the approximate 28-day compressive strength?

Accepted Answer

Correct answer: B. 25 MPa — M25 designation means the concrete will achieve 25 MPa minimum compressive strength at 28 days with 95% probability.

Answer

A. 20 MPa

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C. 30 MPa

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D. 35 MPa

Question 8

Which of the following is a measure of concrete workability?

Accepted Answer

Correct answer: A. Slump test — Slump test is the most common field test to measure the workability and flow characteristics of fresh concrete.

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B. Compressive strength test

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C. Modulus of elasticity

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D. Permeability test

Civil Engineering - MCQ Practice Questions