18 Questions
How is the abrasive charge chosen for the Los-Angeles test?
Depending upon the aggregate
How many revolutions are required for grading A, B, C, and D in the Los-Angeles test?
500 revolutions
What is the maximum allowable abrasion value for the W.B.M subsurface course in the Los-Angeles test?
60
What size sieve is used in the Los-Angeles test to determine percentage wear?
1.7mm IS sieve
How many spheres are used for grading E, F, and G in the Los-Angeles test?
12
How is the material discharged from the Los-Angeles test machine?
Taking care to take out entire stone dust
What is a strap footing?
A strap footing is when the independent footings of two columns are connected by a beam.
When are continuous footings used?
Continuous footings are used when a footing is common to more than two columns in a row.
What are the two types of R.C.C. footings mentioned?
The two types of R.C.C. footings mentioned are One way reinforced footings and Two way reinforced footings.
In which direction are the main reinforcements placed in One Way Reinforced Footings?
In the transverse direction of the wall.
When are Inverted Arch Footings typically used?
Inverted Arch Footings are typically used for multi-storeyed buildings in olden times.
Why are strap footings necessary when the distance between columns is great?
Strap footings are necessary because combined trapezoidal footings become quite narrow with high bending moments.
What are the requirements of good building stones?
Good building stones should be hard, durable, free from weathering, and have uniform texture.
Explain the dressing of stones.
Dressing of stones is the process of smoothing and shaping the stones for construction purposes.
What are the requirements of good building bricks?
Good building bricks should have uniform color, be well burnt, have sharp edges, and emit clear metallic sound when struck.
What are the tests conducted on fine aggregates and explain briefly?
Tests on fine aggregates include sieve analysis, specific gravity, and water absorption tests.
Explain the needs or importance for conducting soil investigation.
Soil investigation is important to determine soil properties, assess foundation requirements, and ensure stability of structures.
What is the safe bearing capacity of soil and how can it be improved?
Safe bearing capacity is the maximum pressure a soil can safely carry. Methods to improve SBC include soil stabilization, using deep foundations, and ground improvement techniques.
Learn about the procedure for conducting an aggregate abrasion test, including choosing the abrasive charge, machine rotation, and sieving the material. Understand the steps involved in grading based on the number of revolutions.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
