1. The critical load for buckling of a column is calculated using the formula:
A. Pcr=π2EIL2P_{cr} = \frac{\pi^2EI}{L^2}Pcr=L2π2EI
B. Pcr=π2EILP_{cr} = \frac{\pi^2EI}{L}Pcr=Lπ2EI
C. Pcr=4EIL2P_{cr} = \frac{4EI}{L^2}Pcr=L24EI
D. Pcr=EILP_{cr} = \frac{EI}{L}Pcr=LEI
Answer: A) Pcr=π2EIL2P_{cr} = \frac{\pi^2EI}{L^2}Pcr=L2π2EI
Rationale: The formula for the critical load PcrP_{cr}Pcr of a column under axial
compression is Pcr=π2EIL2P_{cr} = \frac{\pi^2EI}{L^2}Pcr=L2π2EI, where EEE is
the modulus of elasticity, III is the moment of inertia, and LLL is the effective length
of the column.
2. Which of the following tests is used to check the strength of hardened concrete?
A. Slump test
B. Compressive strength test
C. Flexural test
D. Impact test
Answer: B) Compressive strength test
,Rationale: The compressive strength test is used to determine the strength of hardened
concrete by measuring its ability to resist axial loads.
3. Which of the following is the primary material used for the construction of
highways?
A. Steel
B. Concrete
C. Bitumen
D. Wood
Answer: C) Bitumen
Rationale: Bitumen is used primarily in the construction of flexible pavements
(highways) because of its binding and waterproofing properties.
4. The moment-curvature relationship of a beam is used to predict:
A. The deflection of the beam
B. The bending strength of the beam
C. The ultimate load capacity of the beam
D. The stress distribution across the beam
Answer: B) The bending strength of the beam
, Rationale: The moment-curvature relationship is used to determine the bending
strength and behavior of a beam under bending moments.
5. What is the main function of a diaphragm wall?
A. To transfer loads from superstructure to foundation
B. To resist lateral earth pressure
C. To distribute vertical loads evenly
D. To act as a shear wall
Answer: B) To resist lateral earth pressure
Rationale: Diaphragm walls are used to resist lateral earth pressure, typically in deep
excavation projects like basements and tunnels.
6. What is the range of slump for medium workability concrete?
A. 25 mm to 50 mm
B. 50 mm to 100 mm
C. 100 mm to 150 mm
D. 150 mm to 200 mm
Answer: B) 50 mm to 100 mm
A. Pcr=π2EIL2P_{cr} = \frac{\pi^2EI}{L^2}Pcr=L2π2EI
B. Pcr=π2EILP_{cr} = \frac{\pi^2EI}{L}Pcr=Lπ2EI
C. Pcr=4EIL2P_{cr} = \frac{4EI}{L^2}Pcr=L24EI
D. Pcr=EILP_{cr} = \frac{EI}{L}Pcr=LEI
Answer: A) Pcr=π2EIL2P_{cr} = \frac{\pi^2EI}{L^2}Pcr=L2π2EI
Rationale: The formula for the critical load PcrP_{cr}Pcr of a column under axial
compression is Pcr=π2EIL2P_{cr} = \frac{\pi^2EI}{L^2}Pcr=L2π2EI, where EEE is
the modulus of elasticity, III is the moment of inertia, and LLL is the effective length
of the column.
2. Which of the following tests is used to check the strength of hardened concrete?
A. Slump test
B. Compressive strength test
C. Flexural test
D. Impact test
Answer: B) Compressive strength test
,Rationale: The compressive strength test is used to determine the strength of hardened
concrete by measuring its ability to resist axial loads.
3. Which of the following is the primary material used for the construction of
highways?
A. Steel
B. Concrete
C. Bitumen
D. Wood
Answer: C) Bitumen
Rationale: Bitumen is used primarily in the construction of flexible pavements
(highways) because of its binding and waterproofing properties.
4. The moment-curvature relationship of a beam is used to predict:
A. The deflection of the beam
B. The bending strength of the beam
C. The ultimate load capacity of the beam
D. The stress distribution across the beam
Answer: B) The bending strength of the beam
, Rationale: The moment-curvature relationship is used to determine the bending
strength and behavior of a beam under bending moments.
5. What is the main function of a diaphragm wall?
A. To transfer loads from superstructure to foundation
B. To resist lateral earth pressure
C. To distribute vertical loads evenly
D. To act as a shear wall
Answer: B) To resist lateral earth pressure
Rationale: Diaphragm walls are used to resist lateral earth pressure, typically in deep
excavation projects like basements and tunnels.
6. What is the range of slump for medium workability concrete?
A. 25 mm to 50 mm
B. 50 mm to 100 mm
C. 100 mm to 150 mm
D. 150 mm to 200 mm
Answer: B) 50 mm to 100 mm
