FES written exam 2024 Actual Questions and
Answers with complete solution
Young's Modulus - ANSWERS E
modulus of elasticity
How much does something compress - ANSWERS strain = compression
Δ = change in compression
Δ =PL/AE
γ
c
ф
(Geotechnical) - ANSWERS Unit weight
cohesion
angel of internal friction
bearing capacity - ANSWERS use ultimate bearing capacity equation then divide
by factor of safety
cohesion value for sand - ANSWERS zero
Pressure at bottom of a wall
,(fluids) - ANSWERS (fluids) unit weight x h
(geotech) Ka(unit weight x h)
Ka = active earth pressure
ρ = Ka(γxh)
P = 1/2(ρxh) for triangular pressure point load
overturning moment = P(h/3)
Determine factor of safety of a retaining wall resisting earth. Wall has a moment
6000 ft-lbs& earth is acting in the opposite direction to overturn the wall with
3146 ft-lbs - ANSWERS moment of wall/moment of earth = factor of safety
If factor of safety isn't enough, need a bigger wall
Active earth pressure vs Passive earth pressure - ANSWERS Active: trying to
overturn the wall
Passive: trying to resist active (don't have to worry about if wall is level with
earth, not embedded)
log b - log a also equals - ANSWERS log(b/a)
Secant Modulus - ANSWERS Between origin and any "arbitrary" point on the
curve
, Cord Modulus - ANSWERS Between any two points
Tangent Modulus - ANSWERS At one "arbitrary" point on the curve
Modulus of Elasticity of Steel - ANSWERS 29,000 ksi
Modulus of Elasticity of Aluminum - ANSWERS 10,000-11,000 ksi
Modulus of Elasticity of Concrete - ANSWERS 2,000-6,000 ksi
Modulus of Elasticity of Wood - ANSWERS 900-2,200 ksi
Poisson's Ratio - ANSWERS Relates lateral and axial strain
εl/εa
0-.5 (0=incompressible, 0.5=no volume change)
when stretched, a material's cross section is decreased. when compressed, a
material's cross section is increased.
Elastic Limit - ANSWERS The transition going from elastic to plastic
Will a Brittle material have a plastic region - ANSWERS No
Answers with complete solution
Young's Modulus - ANSWERS E
modulus of elasticity
How much does something compress - ANSWERS strain = compression
Δ = change in compression
Δ =PL/AE
γ
c
ф
(Geotechnical) - ANSWERS Unit weight
cohesion
angel of internal friction
bearing capacity - ANSWERS use ultimate bearing capacity equation then divide
by factor of safety
cohesion value for sand - ANSWERS zero
Pressure at bottom of a wall
,(fluids) - ANSWERS (fluids) unit weight x h
(geotech) Ka(unit weight x h)
Ka = active earth pressure
ρ = Ka(γxh)
P = 1/2(ρxh) for triangular pressure point load
overturning moment = P(h/3)
Determine factor of safety of a retaining wall resisting earth. Wall has a moment
6000 ft-lbs& earth is acting in the opposite direction to overturn the wall with
3146 ft-lbs - ANSWERS moment of wall/moment of earth = factor of safety
If factor of safety isn't enough, need a bigger wall
Active earth pressure vs Passive earth pressure - ANSWERS Active: trying to
overturn the wall
Passive: trying to resist active (don't have to worry about if wall is level with
earth, not embedded)
log b - log a also equals - ANSWERS log(b/a)
Secant Modulus - ANSWERS Between origin and any "arbitrary" point on the
curve
, Cord Modulus - ANSWERS Between any two points
Tangent Modulus - ANSWERS At one "arbitrary" point on the curve
Modulus of Elasticity of Steel - ANSWERS 29,000 ksi
Modulus of Elasticity of Aluminum - ANSWERS 10,000-11,000 ksi
Modulus of Elasticity of Concrete - ANSWERS 2,000-6,000 ksi
Modulus of Elasticity of Wood - ANSWERS 900-2,200 ksi
Poisson's Ratio - ANSWERS Relates lateral and axial strain
εl/εa
0-.5 (0=incompressible, 0.5=no volume change)
when stretched, a material's cross section is decreased. when compressed, a
material's cross section is increased.
Elastic Limit - ANSWERS The transition going from elastic to plastic
Will a Brittle material have a plastic region - ANSWERS No
