QUESTIONS AND ANSWERS 100% CORRECT!!
In steel structures, structural steel is the main ... - ANSWER Load carrying material to
transfer the load within them and to transfer load to the ground
List 2 common steel structures - ANSWER 1. Roof trusses
2. Crane girders, columns, beams
3. Plate girders, bridges
4. Transmission towers
3 Advantages of structural steel - ANSWER 1. High compressive & tensile strength per
unit weight
2. Low construction weight
3. Good aesthetic view
4. Good quality and durability
5. Very high speed of construction
6. Reusability and scrap value
7. Better solution to cover large span and tall structures
2 Disadvantages of structural steel - ANSWER 1. High initial cost
3. Corrosion
3. Low fire resistance
The 2 main steps to steel making - ANSWER 1. Iron is extracted from iron ores like
haematite, limestone, magnetite in furnace
2. Oxygen is passed through molten iron to remove carbon and impurities to make steel
Adding chrome, nickel, phosphorous can impart .... - ANSWER Special properties in
steel
Semi finished products from the steel making machine are hot rolled to ... - ANSWER
Make different sections like bars,
plates, angles, sections
Adding carbon to steel ... - ANSWER Increases the tensile strength
and hardness but lowers ductility and toughness
, Steel corrodes in ... - ANSWER Moist air, sea water and acid
Hardness definition - ANSWER Resistance of the material to intentions and scratching
Brinell harness and rockwell hardness number are used to ... - ANSWER Measure
hardness
Fatigue definition - ANSWER Damage of material to cyclic loading
Residual stress definition - ANSWER Latent stress present in the steel sections due to
uneven heating and cooling during steel making
3 Common types of steel section - ANSWER 1. I section (i upper case)
2. Tee section
3. Channel section
4. Angle section
5. Steel bars, tubes plates, strips
Universal beam section dimensions - ANSWER Depth*Width*Weight per unit length
(Example: 533*210*82 UKB)
5 Types of steel frame - ANSWER 1. Braced
2. Moment resisting
3. Core and suspended floors
4.Tapered portal
5. Lattice girder
6. Pylon
7. Knee brace
8. Cable stayed bridge
9. Suspension bridge
2 Factors affecting section choice - ANSWER 1. Sectional properties
2. Availability
3. Country preference
3 Types of loads on structures - ANSWER 1. Dead load
2. Live load
3. Wind load
4. Accidental load
5. Earthquake load