Engineering Concepts and Calculations
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Questions and Answers

The total estimated electrical works cost of a building usually accounts for what percentage?

0.08

What is used to measure velocity of flow?

A pitot tube

What is used to determine the grain size distribution of coarse-grained soil?

Sieve Analysis

What is the standard lane width for rural travelled lanes?

<p>2.5 m</p> Signup and view all the answers

Find the surface area generated by rotating the parabola y = x2 about the x axis from x = 0 to x = 1.

<p>5.33</p> Signup and view all the answers

Which of the following gives the value of the resultant for the given loads on a cantilever beam?

<p>Option 1</p> Signup and view all the answers

What is the shrinkage factor of compaction for earthworks?

<p>25%</p> Signup and view all the answers

Find the area of the region included between 4y = 3x2 and the line 3x - 2y + 12 = 0.

<p>27</p> Signup and view all the answers

Which of the following gives the location of the point of inflection from the left end in the given shear diagram?

<p>Option 1</p> Signup and view all the answers

Find the slope of the curve y = x2(x+2)3 at point (1, 2).

<p>81</p> Signup and view all the answers

On what time scales does drought occur?

<p>Years</p> Signup and view all the answers

A wood beam carries the loading shown in the figure. Determine the smallest allowable width b of the beam if the working stress in bending is 10 MPa.

<p>Option 1</p> Signup and view all the answers

What is the ASTM standard for slump test?

<p>ASTM C143</p> Signup and view all the answers

What is the sum of all possible solutions for x of the equation x(x - k) = k + 1?

<p>-k</p> Signup and view all the answers

To estimate a 100-year flood, the period of reliable, homogeneous streamflow record should be at least how many years?

<p>50 years</p> Signup and view all the answers

A man weighing 70kg is in an elevator moving upward with an acceleration of 2.5 m/s2. What pressure does he exert on the floor of the elevator?

<p>87.8</p> Signup and view all the answers

Christine Mae is 7 years older than Vienah. In three years, Christine Mae will be twice as old as Vienah. Find the sum of their present ages.

<p>15</p> Signup and view all the answers

What is the ratio of the volume of water in the void spaces to the volume of the voids? It is simply the measure of the void volume that is filled by water, expressed as percentage ranging from 0 to 100.

<p>Degree of Saturation</p> Signup and view all the answers

From the given beam in the figure, using a uniform live load of 18 kN/m and a concentrated live load of 90 kN. Compute the maximum positive moment at C using influence line in each case.

<p>Option 1</p> Signup and view all the answers

Is defined as the ratio between the grain diameter (in millimeters) corresponding 60 percent passing on the curve (D60) divided by the diameter of the 10 percent (D10) passing?

<p>Coefficient of Uniformity</p> Signup and view all the answers

A circular punch 20 mm in diameter is used to punch a hole through a steel plate 10 mm thick. If the force necessary to drive the punch through the metal is 250 kN, determine the maximum shearing stress developed in the material.

<p>398 MPa</p> Signup and view all the answers

What is the unit of kinematic viscosity?

<p>m2/sec</p> Signup and view all the answers

A ball is thrown horizontally with a speed of 25 m/s from the top of a tower 20 meters high. Assuming level ground below and negligible air resistance, what will be the magnitude of the vertical velocity component when the ball hits the ground?

<p>20 m/s</p> Signup and view all the answers

A driver traveling at 50 mph sees a wall at a certain distance ahead. The driver applies the brakes immediately (perception time is 3 seconds) and begins slowing the vehicle at 6 m/s². If the distance from the stopping point to the wall is 12 m, how far was the car from the wall upon perception?

<p>120.74</p> Signup and view all the answers

What is a river basin?

<p>A collective grouping of all watersheds that compose a major river system</p> Signup and view all the answers

What is the distribution in the particle size of the soil?

<p>Gradation</p> Signup and view all the answers

The radius of a sphere decreases from 6.0 cm to 5.96 cm. Determine the approximate change in the surface area.

<p>6.03 cm2</p> Signup and view all the answers

The thickness of a sharp crested weir is kept less than

<p>one-half of the height of water on the sill.</p> Signup and view all the answers

Generally, the unit of measurement for partition wall is

<p>square meter</p> Signup and view all the answers

Study Notes

Electrical Works Cost

  • Estimated electrical works cost for buildings is typically 0.08

Pitot Tube

  • Used to measure flow velocity
  • Used to determine grain size distribution in coarse-grained soil

Sieve Analysis

  • Standard lane widths for rural traveled lanes are 2.5 m

Parabola Rotation

  • Surface area generated by rotating parabola y = x² around x-axis, from x = 0 to x = 1 is 5.33

Cantilever Beam

  • Loaded by three forces and a couple
  • Resultant force calculation requires figure

Shrinkage Factor

  • Compaction shrinkage factor for earthworks is 25%

Area Between Curves

  • Area between 4y = 3x² and 3x - 2y + 12 = 0 is to be found

Shear Diagram Inflection Point

  • Location of inflection point from left end in a shear diagram requires figure

Curve Slope

  • Slope of y = x²(x+2)³ at (1,2) is 81

Drought Time Scales

  • Drought occurs on time scales of years

ASTM C143

  • Standard for slump test

Equation Solutions

  • Sum of solutions for x in the equation x(x-k) = k+1 is -k

Flood Estimation

  • Reliable, homogeneous streamflow record for a 100-year flood should be at least 50 years

Elevator Pressure

  • A man weighing 70 kg in an elevator accelerating upwards at 2.5 m/s² exerts a pressure of 87.8 N

Age Calculation

  • Christine Mae is 7 years older than Vienah. In three years, Christine Mae will be twice Vienah's age. Sum of their current ages is 15

Degree of Saturation

  • Ratio of water volume in voids to total volume of voids, expressed as a percentage

Maximum Positive Moment

  • Calculation of maximum positive moment at point C in a beam, using influence lines, requires figure

Coefficient of Uniformity

  • Ratio of D₆₀ (grain diameter at 60% passing) to D₁₀ (grain diameter at 10% passing)

Punching Force

  • Maximum shearing stress in a steel plate for a circular punch is 398 MPa

Firefighter Friction

  • Friction force on a 70 kg firefighter sliding down a pole accelerating at 2 m/s² is 540 N

Syphon Use

  • Syphon connects water reservoirs at different levels, often across a hill

Plank Sliding

  • A 120 kg man walking on a 4 m plank will start sliding at a distance x = 2.32 m if the coefficient of friction at A is 0.40 and at B is 0.20

Concrete Vibrator Frequency

  • Frequency for concrete vibrator use is 3600 vibrations per minute or more

Sum of Squares

  • The sum of two numbers multiplied by the sums of their squares is 5500, and their difference multiplied by the differences of their squares is 352. The product of two numbers is 117

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Engineering Calculations PDF

Description

Test your knowledge on various engineering concepts including electrical costs, fluid mechanics, and structural analysis. Explore topics such as slope of curves, shear diagrams, and sieve analysis. This quiz is ideal for engineering students and professionals looking to refresh their skills.

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