ጥያቄ

የአዲስ አበባ ቀላል ባቡር (AALRT) ምን አይነት delivery method ነበር?

1. DB (design build)
2. DBB ( design bid build)
3. BOT (build operate transfer)
4. All

Participate

#LRT
#etconp

Steel structure design quiz 🔔 🔔 🔔

Suppose 👆🏾👆🏾this is I section steel beam. what does number 1 , 2 and 3 represent ?

1️⃣ 1. flange 2. Web
3. Bottom flange

2️⃣ 1. Bottom flange 2. Web
3. Flange

3️⃣ 1. Top flange 2. Web
3. Bottom flange

4️⃣ All of the above

#steel #quiz #etconp #share

ይህን ጥያቄ ለጓደኞቻችው በማጋራት አጋርነታችሁን አሳዩን 🙏

@etconp

What operation is this Long reach excavator engaged in ?

1️⃣. Excavation of a railway cutting

2️⃣. Placing track ballast

3️⃣. Slope stabilization

4️⃣. Transporting personnel to a work
site

#equipment #quiz #etconp

Telegram:- @etconp

Instagram:- https://instagram.com/etconp?igshid=1e61fch3x71na

👉Some Highway Engineering Notes


🚧Stopping distance = Lag distance + Braking distance

▶️Lag distance = Distance travelled by the vehicle during the total reaction time.
▶️Braking distance = Distance travelled by the vehicle after the application of the brakes, to a dead stop position.

🚧In ascending gradients, braking distance decreased.

🚧In descending gradients, braking distance increases.

🚧Stopping sight distance and Stopping distance are different.

🚧Minimum Stopping sight distance = Stopping distance in following cases
(In one way traffic lanes,In two way traffic roads having 2 or more traffic lanes)

🚧Minimum Stopping sight distance = TWICE the Stopping distance in following cases
( On roads with restricted width , On single lane roads when two way movement of traffic is permitted)

🚧The Stopping sight distance (SSD) should be provided throughout the length of all roads and hence this is also known as absolute minimum sight distance.

🚧Higher Stopping sight distance is required in case of descending gradients.

#HighwayEnginnering

#etconp

📌Basic terms for Mechanics

🚧1. Torque or Turning Force

➡️It is the total amount of force which is required to create acceleration on moving substance.

🚧2. Couple

➡️Two forces those acts on equally, parallely & oppositely on two separate points of same material.

🚧3. Moment

➡️It is the amount of moving effect which is gained for action of turning force.

🚧4. Stress

➡️It is the force that can prevent equal & opposite force.

➡️That means, it is the preventing force.

➡️If one force acts on outside of a material, then a reactive force automatically acts to protest that force.

➡️The amount of reactive force per unit area is called stress.

➡️For instance:- Tensile Stress, Compressive Stress, Thermal Stress.

🚧5. Strain

➡️If a force acts on a substance, then in that case if the substance would deform.

➡️Then the amount of deformation per unit length of that substance is called strain.

🚧6. Spring

➡️It is one type of device which is being distorted under certain amount of load & also can also go to its original face after the removal of that load.
Its function

⏺i. To store energy

⏺ii. To absorb energy

⏺iii. To control motion of two elements

🚧7. Stiffness

➡️Load per unit deflection. The amount of load required to resist the deflection.

🚧8. Specific Weight

➡️Weight per unit volume of the fluid.

🚧9. Specific Volume

➡️Volume per unit mass of the fluid.

🚧10. Specific Gravity

➡️It is the ratio of specific weight of required substance to specific weight of pure water at 4 degree centigrade temperature.

#Mechanics

#etconp

ጥያቄ

የአዲስ አበባ ቀላል ባቡር (AALRT) ምን አይነት delivery method ነበር?

1. DB (design build)
2. DBB ( design bid build)
3. BOT (build operate transfer)
4. All

Participate

#LRT
#etconp