Civil Engineering Exams (Principles of Structural Analysis and Design) - Free Online Reviewers

#100. A beam 300 mm wide by 450 mm deep is simple supported on a span o 5 m.
Given

Superimposed uniformly distributed:

Dead Load = 16 kN/m

Live Load = 14 kN/m

fc' = 30 MPa

fy = 415 MPa

E_s = 200 GPa

Unit weight of concrete = 23.5 kN/m³

Depth to the centroid of tension reinforcement = 70 mm from the bottom

What is the maximum factored design moment Mu(kN.m)? U = 1.4D + 1.7 L

A 130 kN.m

B 148 kN.m

C 158 kN.m

D 168 kN.m

Answer: 158 kN.m

#101. A beam 300 mm wide by 450 mm deep is simple supported on a span o 5 m.
Given

Superimposed uniformly distributed:

Dead Load = 16 kN/m

Live Load = 14 kN/m

fc' = 30 MPa

fy = 415 MPa

E_s = 200 GPa

Unit weight of concrete = 23.5 kN/m³

Depth to the centroid of tension reinforcement = 70 mm from the bottom

Determine the number of 20 mm diameter tension bars required at midspan due to the applied maximum design moment. Apply moment capacity reduction factor = 0.9. Assume a single-reinforced beam. U = 1.4D + 1.7 L

A Use 4 -20 mm φ bars

B Use 6 -20 mm φ bars

C Use 8 -20 mm φ bars

D Use 5 -20 mm φ bars

Answer: Use 4 -20 mm φ bars

#102. A beam 300 mm wide by 450 mm deep is simple supported on a span o 5 m.
Given

Superimposed uniformly distributed:

Dead Load = 16 kN/m

Live Load = 14 kN/m

fc' = 30 MPa

fy = 415 MPa

E_s = 200 GPa

Unit weight of concrete = 23.5 kN/m³

Depth to the centroid of tension reinforcement = 70 mm from the bottom

What is the nominal bending capacity (kN.m) of the section if the tension reinforcement consists of 3-25 mm φ bars?

A 198 kN.m

B 208 kN.m

C 158 kN.m

D 229 kN.m

Answer: 208 kN.m

#103. A 5 m long cantilever beam 300 mm by 400 mm in cross-section carries a total uniformly distributed load of 26 kN/m. Beam modulus of elasticity is 25 x 10³ MPa.
What is the maximum beam deflection at the end?

A 60.36 mm

B 50.8 mm

C 39.7 mm

D 46.7 mm

Answer: 50.8 mm

#104. A 5 m long cantilever beam 300 mm by 400 mm in cross-section carries a total uniformly distributed load of 26 kN/m. Beam modulus of elasticity is 25 x 10³ MPa.
What is the force (kN) should be applied at the free end of the beam to prevent its deflection?

A 48.8 kN

B 56.6 kN

C 39.9 kN

D 44.4 kN

Answer: 48.8 kN

#105. A 5 m long cantilever beam 300 mm by 400 mm in cross-section carries a total uniformly distributed load of 26 kN/m. Beam modulus of elasticity is 25 x 10³ MPa.
What is the force (kN) should be applied at the mid-length of the beam in order to balance its deflection at the free end?

A 166 kN

B 156 kN

C 146 kN

D 136 kN

Answer: 156 kN

#106. A steel cable is used to lift a load w.
Given:
w(total load including weight of the cable) = 175 kN
Properties of the cable:
Diameter = 30 mm

Length = 12 mm

Modulus of elasticity = 200 GPa
Find the elongation of the cable as it lifts the load w.

A 12 mm

B 13 mm

C 14 mm

D 15 mm

Answer: 15 mm

#107. A steel cable is used to lift a load w.
Given:
w(total load including weight of the cable) = 175 kN
Properties of the cable:
Diameter = 30 mm

Length = 12 mm

Modulus of elasticity = 200 GPa
What is the resulting strain (mm/mm) in the cable as it lifts the load w?

A 0.00124

B 0.000124

C 0.00132

D 0.000132

Answer: 0.00124

#108. A steel cable is used to lift a load w.
Given:
w(total load including weight of the cable) = 175 kN
Properties of the cable:
Diameter = 30 mm

Length = 12 mm

Modulus of elasticity = 200 GPa
Due to a heavy load, the cable breaks. The recorded diameter of failure is 27.5 mm. What is the ductility of the material?

A 16 %

B 17 %

C 18 %

D 19 %

Answer: 16 %

#109. Sound waves moving through the air is an example of __________________ waves.

A Longitudinal

B Transverse

C Surface

D Electromagnetic

Answer: Longitudinal

#110. The wall thickness of a 4-ft diameter spherical tank is 5/16 inch. Calculate the allowable internal pressure if the stress is limited to 8000 psi.

A 208 psi

B 200 psi

C 210 psi

D 250 psi

Answer: 208 psi

#111. A water tank is 22 ft in diameter, is made from steel plates that are 0.5 inch thick. Find the maximum height to which the tank may be filled if the circumferential stress is limited to 6000 psi.

A 60.8 ft

B 42.6 ft

C 52.4 ft

D 84.52 ft

Answer: 52.4 ft

#112. At what angular velocity will the stress in a rotating steel ring equal to 150 MPa if its mean radius if 220 mm? The density of steel is 7.85 Mg/m³.

A 720 rad/s

B 867 rad/s

C 584 rad/s

D 628 rad/s

Answer: 628 rad/s

#113. The stress beyond which the material will not return to its original shape when unloaded but will retain a permanent deformation.

A yield point

B elastic limit

C plastic limit

D permanent set

Answer: elastic limit

#114. The stress that is proportional to the strain with in the elastic region.

A Hookes Law

B Young's Modulus

C Poisson's Ration

D St. Venant's Principle

Answer: Hookes Law

#115. It is the force which determines whether the body will be in equilibrium or will have a varying state of motion.

A Normal

B Impulse

C Axial

D Resultant

Answer: Resultant

#116. A cantilever hollow circular bar 5 mm thick with outside diameter of 75 mm is subjected to a torque of 3 kN.m at its free end. What is the max shear stress in the bar?

A 85.60 Mpa

B 88.25 Mpa

C 83.10 Mpa

D 79.40 Mpa

Answer: 83.10 Mpa

#117. An 8 mm thick steel tank has an outside diameter of 600 mm and a length of 3 m. It is subjected to an internal pressure of 2 MPa. What is the circumferential stress in the tank?

A 73 Mpa

B 83 Mpa

C 63 Mpa

D 93 Mpa

Answer: 73 Mpa

#118. An 8 mm thick steel tank has an outside diameter of 600 mm and a length of 3 m. It is subjected to an internal pressure of 2 MPa. What is the longitudinal stress in the tank?

A 65.3 Mpa

B 23.8 Mpa

C 36.5 Mpa

D 73.5 Mpa

Answer: 36.5 Mpa

#119. An 8 mm thick steel tank has an outside diameter of 600 mm and a length of 3 m. It is subjected to an internal pressure of 2 MPa. To what value could the internal pressure be increased if the allowable design stress is 120 MPa.

A 3.28 MPa

B 2.28 MPa

C 4.28 MPa

D 1.28 MPa

Answer: 3.28 MPa

Civil Engineering Exams (Principles of Structural Analysis and Design) – Page 6

#103. A 5 m long cantilever beam 300 mm by 400 mm in cross-section carries a total uniformly distributed load of 26 kN/m. Beam modulus of elasticity is 25 x 103 MPa. What is the maximum beam deflection at the end?

#104. A 5 m long cantilever beam 300 mm by 400 mm in cross-section carries a total uniformly distributed load of 26 kN/m. Beam modulus of elasticity is 25 x 103 MPa. What is the force (kN) should be applied at the free end of the beam to prevent its deflection?

#105. A 5 m long cantilever beam 300 mm by 400 mm in cross-section carries a total uniformly distributed load of 26 kN/m. Beam modulus of elasticity is 25 x 103 MPa. What is the force (kN) should be applied at the mid-length of the beam in order to balance its deflection at the free end?

#106. A steel cable is used to lift a load w. Given: w(total load including weight of the cable) = 175 kN Properties of the cable: Diameter = 30 mm Length = 12 mm Modulus of elasticity = 200 GPa Find the elongation of the cable as it lifts the load w.

#107. A steel cable is used to lift a load w. Given: w(total load including weight of the cable) = 175 kN Properties of the cable: Diameter = 30 mm Length = 12 mm Modulus of elasticity = 200 GPa What is the resulting strain (mm/mm) in the cable as it lifts the load w?