Which IS Code is used for design loads for buildings and structures for wind load?
a) IS 456
b) IS 875 Part 3
c) IS 500
d) IS 1280
Q.2.
IS Code gives basic wind speed averaged over a short interval of ______
a) 10 seconds
b) 20 seconds
c) 5 seconds
d) 3 seconds
Q.3.
Positive sign of pressure coefficient indicates ______________
a) pressure acting towards the surface
b) pressure acting away the surface
c) pressure acting above the surface
d) pressure acting below the surface
Q.4.
Which of the following relation is correct for pressure coefficient?
a) [1+(Vp/Vz)2].
b) [1+(Vz/Vp)2].
c) [1-(Vz/Vp)2].
d) [1-(Vp/Vz)2].
Q.5.
What is return period?
a) number of years, the reciprocal of which gives the probability of extreme wind exceeding given wind speed in any one year
b) number of years, the reciprocal of which gives the probability of extreme wind less than given wind speed in any one year
c) number of years, the reciprocal of which gives the probability of mild wind exceeding given wind speed in any one year
d) number of years, the reciprocal of which gives the probability of mild wind less than given wind speed in any one year
Q.6.
Wind Pressure at any height of structure does not depend on _______
a) velocity and density of air
b) angle of wind attack
c) topography of ground surface
d) material of structure
Q.7.
Which of the following relation is correct for design wind speed (Vz) and basic wind speed (Vb) ?
a) Vz ∝ Vb2
b) Vz ∝ 1/Vb2
c) Vz ∝ Vb
d) Vz ∝ 1/Vb
Q.8.
Calculate design wind speed for a site in a city with basic wind speed ofm/s, risk coefficient =topography factor =terrain is with closely spaced buildings and height of building (class A) = 15m.
a) 40 m/s
b) 48.5 m/s
c) 50 m/s
d) 52.5 m/s
Q.9.
Which of the following relation between design pressure, pz and design wind speed, Vz is correct?
a) pz ∝ Vz2
b) pz ∝ 1/Vz2
c) pz ∝ Vz
d) pz ∝ 1/Vz
Q.10.
Calculate the design wind pressure if the basic wind speed ism/s, risk coefficient istopography factor isterrain is with closely spaced buildings and height of building(class A) =.
a) 1285 N/m2
b) 1580 N/m2
c) 1085 N/m2
d) 1185 N/m2
Q.11.
What is the partial safety factor for combination of DL+LL for limit state of strength, where DL=Dead load, LL=imposed load?
a) 1.2
b) 1.0
c) 0.8
d) 1.5
Q.12.
Which of the following load combination is not possible?
a) Dead load + imposed load + wind load
b) Dead load + imposed load + earthquake load
c) Dead load + wind load + earthquake load
d) Dead load + imposed load
Q.13.
What is the partial safety factor for dead load in combination of DL+LL+WL/EL for limit state of serviceability, where DL=Dead load, LL=imposed load , WL=wind load, EL=earthquake load ?
a) 1.0
b) 0.8
c) 1.5
d) 1.2
Q.14.
What is the partial safety factor for dead load in combination of DL+ WL/EL for limit state of serviceability, where DL=Dead load, WL=wind load, EL=earthquake load ?
a) 1.0
b) 1.5
c) 1.2
d) 0.8
Q.15.
What is the partial safety factor for imposed load in combination of DL+LL+AL , where DL=Dead load, WL=wind load, AL=Accidental load ?
a) 1.0
b) 0.5
c) 0.4
d) 0.35
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