Civil Engineering
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*ለሲቪል ; ለአርክቴክቶች÷ለኮንስትራክሽን ÷ ለሀይድሮሊክ መሀንዲሶች እና ተማሪዎች የተዘጋጀ ትምህርታዊ ቻናል ፡፡

@engineer03


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microstation+inroads.zip
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@engineer03 @engineer03
@engineer03 @engineer03
Super Elevation

👉🏿 Objective

To counteract the centrifugal force acting on the vehicle at circular curves.

👉🏿 Concept

Raise the road at the edge so the weight component vehicle balance the centrifugal acceleration and avoid the slipping and overturning or vehicle.

👉🏿 Equations


Rv = V²
/ g(fs + e)

Where : e= rate of super elevation
fs = coefficient of friction
R = radius of horizontal curve in meter
V = design speed in m/s
g= 9.81 m/s
👉What is the purpose of superelevation?

 is intended to assist the driver by counteracting the lateral acceleration produced by tracking the curve. ... The adopted criteria allow for the use of maximumsuperelevation rates from 0.04 to 0.12.


#highway #superelevation

❓ስለዚህ super elevation ምን ትላላችሁ?
❓What do you say about this super elevation?

ሀሳብ.. @civilEngineerWork_Bot
https://t.me/engineer03
This set of Basic Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Compass Surveying”.

1. The direction of a line relative to a given meridian is called:
a) Bearing
b) Declination
c) Angle
d) Dip


2. How many types of a compass are used in surveying?
a) 4
b) 2
c) 3
d) 5

3. _______ bearing is measured in the direction of survey.
a) Primary
b) First
c) Fore
d) Front

4. In a reduced bearing system, bearing is measured from:
a) Nearest one (North or South)
b) South
c) West
d) North

5. Prismatic Compass is based on the reduced bearing system.
a) True
b) False


6. The bearing of line AB as shown below is represented in reduced bearing as:

a) N150o
b) E60oS
c) S30o
d) S30oE

7. How many meridians are used in surveying?
a) 6
b) 8
c) 3
d) 5

8. ____ is a term used that prevents the needle from pointing to the magnetic North in a given locality.
a) Local attraction
b) Declination
c) Deviation
d) Local distraction

9. _______ line is the line drawn through points of the same declination.
a) Polygonic
b) Isogonic
c) Syngonic
d) Agonic

10. Which of the below is not a temporary adjustment of the prismatic compass?
a) Centring
b) Levelling
c) Focussing prism
d) Adjusting sight vane
Your answer
@civilEngineerWork_Bot