Concrete Compressive Stress and Design Strength
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Questions and Answers

What is the design strength of concrete in flexural compression?

  • 0.45 fck (correct)
  • 0.50 fck
  • 0.33 fck
  • 0.67 fck

What factor is used to determine the permissible compressive stress in concrete?

  • 0.67 fck (correct)
  • 0.75 fck
  • 0.80 fck
  • 0.50 fck

Which value represents the partial factor of safety applied to the concrete compressive strength?

  • 1.0
  • 1.2
  • 2.0
  • 1.5 (correct)

If the characteristic strength of concrete cube is represented as fck, what is the characteristic strength of concrete in an actual structure?

<p>0.67 fck (B)</p> Signup and view all the answers

What is the final compressive stress value after applying the factor of safety to the permissible compressive stress?

<p>0.45 fck (B)</p> Signup and view all the answers

What is the purpose of a contour map in surveying?

<p>To represent the terrain's elevation changes (C)</p> Signup and view all the answers

Which of the following is NOT a principle of concrete mix design?

<p>Curing conditions (D)</p> Signup and view all the answers

In computer-aided design (CAD), which command is typically used to create a new drawing?

<p>NEW (B)</p> Signup and view all the answers

What is the primary factor that significantly affects the shear strength of soil?

<p>Water content (D)</p> Signup and view all the answers

Which type of concrete is specifically designed for enhanced durability and performance under extreme conditions?

<p>High performance concrete (A)</p> Signup and view all the answers

Which surveying method involves the use of a prismatic compass for measuring bearings?

<p>Compass survey (A)</p> Signup and view all the answers

Which method is commonly used for establishing grade contours during contouring?

<p>Interpolation (D)</p> Signup and view all the answers

Which of the following items is included as a topic under the syllabus for Civil & Allied Engineering Exam Group – JE?

<p>Building Construction (B)</p> Signup and view all the answers

What is the focus of the syllabus topic titled 'Construction of superstructure'?

<p>Stone masonry, brick masonry, and vertical communication (C)</p> Signup and view all the answers

What is the main use of waterproofing in concrete construction?

<p>To prevent water penetration into concrete (D)</p> Signup and view all the answers

Which material is classified under masonry materials in the syllabus?

<p>Bricks (B)</p> Signup and view all the answers

What type of structural component is discussed under 'Building components' in the syllabus?

<p>Superstructure (B)</p> Signup and view all the answers

Which of the following techniques is associated with building maintenance in the context of cracks?

<p>Guniting (D)</p> Signup and view all the answers

What does the topic 'Building finishes' cover according to the syllabus?

<p>Processes of laying floors and painting walls (C)</p> Signup and view all the answers

Which type of masonry is explicitly mentioned as part of the 'Construction of superstructure'?

<p>Cavity wall masonry (D)</p> Signup and view all the answers

What is one of the factors that will be addressed under the 'Construction of substructure' topic?

<p>Foundation bearing capacity (A)</p> Signup and view all the answers

What is the primary focus of hydraulics in engineering?

<p>Properties of fluid and hydrostatic pressure (D)</p> Signup and view all the answers

In the context of irrigation engineering, what does reservoir planning typically involve?

<p>Investigation of hydrology (C)</p> Signup and view all the answers

What is a significant advantage of using ready mix concrete in construction?

<p>It reduces labor costs and time on-site. (D)</p> Signup and view all the answers

What is the primary purpose of the Civil Engineering Practice book for RRB-JE Examination?

<p>To help students effectively prepare for the Junior Engineer examination (A)</p> Signup and view all the answers

Which type of estimate is generally used for feasibility studies in construction projects?

<p>Approximate estimate (D)</p> Signup and view all the answers

What is a significant consideration when designing steel structures?

<p>Types of sections and grades of steel (D)</p> Signup and view all the answers

Which method is commonly used in the design of concrete structures to ensure safety?

<p>Working Stress method and Limit State method (D)</p> Signup and view all the answers

How many multiple choice questions (MCQs) does the practice book contain?

<p>3800 MCQs (D)</p> Signup and view all the answers

What characteristic of artificial timber makes it preferable in certain applications?

<p>It is resistant to pests and moisture. (C)</p> Signup and view all the answers

What do shear forces and bending moments primarily relate to in structural mechanics?

<p>Stress and strain in materials (D)</p> Signup and view all the answers

Which advanced concreting method is specifically used when working below water?

<p>Underwater concreting (A)</p> Signup and view all the answers

In what year was the first edition of the Civil Engineering Practice book published?

<p>2019 (A)</p> Signup and view all the answers

Which factor is essential for the analysis and design of T beams in concrete structures?

<p>Development length and bonding (B)</p> Signup and view all the answers

Who is credited with the founding role of MADE EASY Publications?

<p>B.Singh (C)</p> Signup and view all the answers

What does the term 'soil reinforcing techniques' primarily refer to?

<p>Methods to enhance soil structure and stability. (A)</p> Signup and view all the answers

What is one of the fundamental aspects of Transportation Engineering related to railway engineering?

<p>Alignment and gauges of railway tracks (D)</p> Signup and view all the answers

What does MADE EASY Publications recommend concerning reporting errors in the book?

<p>To point out inaccuracies for improvements (B)</p> Signup and view all the answers

Which type of engineering contract typically involves a fixed price for the entire project?

<p>Lump-sum contract (D)</p> Signup and view all the answers

Which of the following describes the focus of the MCQs in the practice book?

<p>They span a variety of concepts relevant to the exam (A)</p> Signup and view all the answers

What is the primary function of hoisting and conveying equipment in construction?

<p>To transport materials vertically or horizontally. (D)</p> Signup and view all the answers

What is a primary concern in Environmental Engineering regarding domestic sewage?

<p>Environmental pollution and control (D)</p> Signup and view all the answers

What is typically included in tender documents for engineering contracts?

<p>Specifications and project details. (C)</p> Signup and view all the answers

What can be inferred about the reprint of the practice book in 2023?

<p>It indicates a growing demand for the material (C)</p> Signup and view all the answers

What kind of responsibility does MADE EASY Publications claim regarding inaccuracies in the book?

<p>They negate any responsibility for printing errors (C)</p> Signup and view all the answers

Flashcards

Characteristic Strength of Concrete (fck)

The strength of concrete that is guaranteed to be achieved in 95% of test samples.

Compressive Strength of Concrete in Structure

The accepted strength of concrete in a structure, assuming concrete is weaker than the characteristic strength.

Partial Factor of Safety for Concrete

A safety factor applied to the compressive strength of concrete to account for uncertainties in material properties and construction processes.

Design Strength of Concrete in Flexural Compression

The final stress that concrete is designed to withstand in flexural compression. It is typically 0.45 times the characteristic strength of concrete (fck).

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Strength of Concrete in Flexural Compression

The process of determining the maximum stress a material can withstand before permanent deformation or failure.

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Strength of a Material

The ability of a material to withstand stress before permanent deformation or failure.

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Compressive Strength

The force acting perpendicular to a surface, causing compression or crushing.

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Tensile Strength

The force acting parallel to a surface, causing stretching or tearing.

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Flexural Strength

The ability of a material to resist bending or flexing.

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Stress

The force acting on a material at a specific point, measured in units like pounds per square inch (psi).

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Strain

The deformation of a material under stress.

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Stress-Strain Curve

The relationship between stress and strain in a material.

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Yield Strength

The maximum stress a material can withstand before permanently deforming.

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Surveying

The science of determining the positions of points on or beneath the Earth's surface, and the distances and angles between them.

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Contour Lines

A set of lines on a map connecting points of equal height.

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Contour Interval

The difference in elevation between two adjacent contour lines.

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Theodolite

A surveying instrument that measures horizontal and vertical angles, used for precise measurements.

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Chain and Cross Staff Survey

A surveying method that uses a chain and a cross-staff to measure distances and angles directly on the ground.

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Bearing of a Line

The direction of a line relative to North, measured in degrees clockwise from North.

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Leveling

The process of determining the elevation of points relative to a datum.

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Plane Table Survey

A surveying method that uses a plane table and alidade to create a scaled drawing of the area being surveyed.

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Viscosity

The ability of a fluid to resist deformation under shear stress.

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Hydrostatic Pressure

The pressure exerted by a fluid at a given depth, due to the weight of the fluid above it.

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Flow Measuring Device

A device that measures the flow rate of a fluid in a pipe or channel.

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Hydrology

The study of water movement and its effects, including precipitation, runoff, and infiltration.

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Reservoir

A structure designed to store water for irrigation or other purposes.

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Bending Moment

The moment of a force about a point, causing a rotation or bending effect.

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Approximate Estimate

Estimating the cost of a project based on rough calculations and assumptions, useful for initial planning and budget allocation.

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Detailed Estimate

A detailed cost breakdown of a project, considering all materials, labor, and equipment, providing a precise cost projection.

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Mode of Measurement

A method of calculating quantities of materials and labor using standardized measurement units and formulas.

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Rate Analysis

A process of breaking down the cost of a project into individual components like labor, materials, and equipment, including their unit costs and quantities.

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Engineering Contract

A legal document outlining the terms, responsibilities, and payment structure for a construction project.

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Tender

A formal proposal submitted by a contractor to a client outlining the scope of work, cost, and schedule for a project.

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Tender Documents

Documents accompanying a tender that provide detailed specifications, drawings, and technical requirements for a project.

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Payment in Engineering Contracts

The process of making payments to contractors based on agreed-upon milestones, quantities completed, or time intervals.

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Study Notes

Concrete Compressive Stress

  • The permissible compressive stress in concrete is 0.67 fck.
  • A partial factor of safety (FOS) of 1.5 is applied.
  • The final stress is 0.45 fck.

Design Strength of Concrete

  • For design purposes, the compressive strength of concrete is assumed to be 0.67 times the characteristic strength.
  • The partial factor of safety of 1.5 must be applied in addition to this.
  • Characteristic strength of concrete (fck) is used as a measure of the strength of concrete.
  • Characteristic strength of concrete in a real structure is 0.67 fck.
  • Design strength of concrete in flexural compression is 0.67 fck / 1.5 which equals 0.45 fck.

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Description

This quiz covers the concepts of permissible compressive stress and design strength of concrete. It focuses on the relationship between characteristic strength and the effects of partial safety factors in concrete design. Test your knowledge on these fundamental aspects of structural engineering.

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