Strength of Materials Mcqs


Calculate the instantaneous elongation if a steel rod of 40 mm and 4 m long subjected to an axial pull of 80 kN. Take E = 2×10? N/mm².

A) 1.23 mm B) 1.27 mm
C) 1.31 mm D) 1.43 mm
Answer & Explanation Answer: B) 1.27 mm

Explanation: An instantaneous elongation = f/A × L ; and f = P/A = 80000/1256.63 = 63.66 N/mm².
= 63.66/1256.63 × 4000
= 1.27 mm.

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Which of the following is an exact estimate?

A) Abstract B) Detailed
C) Rough D) Preliminary
Answer & Explanation Answer: B) Detailed

Explanation: In a detailed estimate, the quantities of each item of work such as earth excavation, bed concrete and brick masonry are calculated. Detailed drawings are required for this estimate.

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By ___________ estimate, a technical sanction is obtained.

A) Approximate B) Detailed
C) Abstract D) Preliminary
Answer & Explanation Answer: B) Detailed

Explanation: Detailed estimate is required for arranging the contract and entering into the agreement. In this estimate, the quantities are worked out in the order in which construction proceeds. For getting technical sanction, the detailed estimate is prepared.

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Service unit method is related to ___________ estimate.

A) Abstract B) Approximate
C) Detailed D) Cubic content
Answer & Explanation Answer: B) Approximate

Explanation: There are over a number of methods available for preparing approximate estimate but the following methods are important
i. Plinth area method
ii. Cubic content method
iii. Service unit method.

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Which of the following estimates is also known as a preliminary estimate?

A) Detailed estimate B) Scientific estimate
C) Approximate estimate D) Abstract estimate
Answer & Explanation Answer: C) Approximate estimate

Explanation: An approximate estimate is prepared to decide whether the funds available for the proposal is sufficient or not. The estimate is accompanied by a detailed report explaining the necessity and utility of the proposal.

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Which of the following rules is known as “Prismoidal Rule”?

A) Mean sectional rule B) Trapezoidal rule
C) Simpson’s rule D) Mid sectional rule
Answer & Explanation Answer: C) Simpson’s rule

Explanation: Prismoidal rule is used when the shape of the solid between two parallel cross sections is in the shape of a prismoid. This is also known as Simpsons rule volume is calculated by
V = L/6 (A1 + 4A + A2).

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What is the painting coefficient for flush doors?

A) 2.3 B) 2.4
C) 3.4 D) 3.6
Answer & Explanation Answer: B) 2.4

Explanation: Not available for this question

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In foundation concrete, coarse aggregate size should be __________

A) 20 mm B) 30 mm
C) 40 mm D) 50 mm
Answer & Explanation Answer: C) 40 mm

Explanation: Generally foundation concrete is laid about thickness of 30 cm with proportion 1:4:8 (or) 1:5:10 and are measured in m³.
Before laying the concrete bed level, sand filling and sinking must be done and checked properly.

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