BSD-II Quiz -1

Elastic Modulus of Steel is

Unit mass of Steel = ________

Answer explanation

As per IS 800-2007, unit mass

of steel is 7850 kg/m³. A steel member with

small section which has little self-weight is

able to resist heavy loads because steel

members have high strength per unit weight

Poisson’s ratio of steel is ________

• 0.1

• 1.0

• 0.3

• 2.0

Answer explanation

Poisson’s ratio = transverse

strain/axial strain. As per IS 800-2007,

Poisson’s ratio of steel is 0.3 in elastic range

and it is 0.5 in plastic range.

Structural Steel normally has carbon

content less than _______

• 1.0%

• 0.6%

• 3.0%

• 5.0%

Answer explanation

Structural Steel normally have

a carbon content less than 0.6%. Carbon

content increases hardness, yield and tensile

strength of steel but it decreases ductility and

toughness.

What does R.C.C. stand for?

• Reinforced Cement Concrete

• Reinforced Concrete Cement

• Reinforced Combined Cement

• Reinforced Constituent Cemen t

Answer explanation

When we say concrete in the

building trade, we actually mean reinforced

concrete. Its full name is reinforced cement

concrete, or RCC. RCC is concrete that

contains steel bars, called reinforcement bars,

or rebars.

Which of the following is correct criteria to

be considered while designing?

• Structure should be aesthetica lly pleasing

  but structurally unsafe

• Structure should be cheap in cost even

  though it may be structurally unsafe

• Structure should be structurally safe but

  less durable

• Structure should be adequately safe, should

  have adequate serviceability

Answer explanation

Structure should be designed

such that it fulfils it intended purpose during

its lifetime and be adequately safe in terms of

strength, stability and structural integrity and

have adequate serviceability. Structure should

also be economically viable, aesthetically

pleasing and environment friendly

What is serviceability?

• It refers to condition w hen structure is not

  usable

• It refers to services offered in the structure

• It means that the structure should perform

  satisfactorily under different loads, without

  discomfort to user

• It means that structure should be

  economically viable

Answer explanation

Serviceability is related to

utility of structure. The structure should

perform satisfactorily under service loads,

without discomfort to user due to excessive

deflection, cracking, vibration, etc. Other

considerations of serviceability are durability,

impermeability, acoustic and thermal

insulation etc.