1. The formula for calculating the load-carrying capacity of a column is:
A. P = σ × A
B. P = F × A
C. P = A × E × I
D. P = σ × I
Answer: A) P = σ × A
Rationale: The load-carrying capacity of a column is given by the formula P=σ×AP =
\sigma \times AP=σ×A, where PPP is the load, σ\sigmaσ is the stress, and AAA is the
cross-sectional area.
2. What is the main function of a concrete slump test?
A. To determine the compressive strength
B. To measure the workability of concrete
C. To measure the curing time
D. To measure the moisture content
Answer: B) To measure the workability of concrete
,Rationale: The slump test is used to measure the workability of fresh concrete, or its
ability to flow when placed in a form.
3. 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.
4. What is the main purpose of a column in a structure?
A. To resist bending
B. To support the superstructure
C. To carry wind loads
D. To resist shear stress
, Answer: B) To support the superstructure
Rationale: The primary function of a column is to support the superstructure (the load-
bearing part of the building) and transfer the loads to the foundation.
5. What is the minimum thickness of a slab for a building according to IS 456: 2000?
A. 150 mm
B. 125 mm
C. 100 mm
D. 50 mm
Answer: A) 150 mm
Rationale: According to IS 456: 2000 (Indian Standard for Reinforced Concrete), the
minimum thickness of a slab should be 150 mm.
6. Which of the following is the correct formula for calculating the deflection of a
cantilever beam under a point load at the free end?
A. δ=PL33EI\delta = \frac{PL^3}{3EI}δ=3EIPL3
B. δ=PL34EI\delta = \frac{PL^3}{4EI}δ=4EIPL3
C. δ=PL43EI\delta = \frac{PL^4}{3EI}δ=3EIPL4
D. δ=PL2EI\delta = \frac{PL^2}{EI}δ=EIPL2
A. P = σ × A
B. P = F × A
C. P = A × E × I
D. P = σ × I
Answer: A) P = σ × A
Rationale: The load-carrying capacity of a column is given by the formula P=σ×AP =
\sigma \times AP=σ×A, where PPP is the load, σ\sigmaσ is the stress, and AAA is the
cross-sectional area.
2. What is the main function of a concrete slump test?
A. To determine the compressive strength
B. To measure the workability of concrete
C. To measure the curing time
D. To measure the moisture content
Answer: B) To measure the workability of concrete
,Rationale: The slump test is used to measure the workability of fresh concrete, or its
ability to flow when placed in a form.
3. 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.
4. What is the main purpose of a column in a structure?
A. To resist bending
B. To support the superstructure
C. To carry wind loads
D. To resist shear stress
, Answer: B) To support the superstructure
Rationale: The primary function of a column is to support the superstructure (the load-
bearing part of the building) and transfer the loads to the foundation.
5. What is the minimum thickness of a slab for a building according to IS 456: 2000?
A. 150 mm
B. 125 mm
C. 100 mm
D. 50 mm
Answer: A) 150 mm
Rationale: According to IS 456: 2000 (Indian Standard for Reinforced Concrete), the
minimum thickness of a slab should be 150 mm.
6. Which of the following is the correct formula for calculating the deflection of a
cantilever beam under a point load at the free end?
A. δ=PL33EI\delta = \frac{PL^3}{3EI}δ=3EIPL3
B. δ=PL34EI\delta = \frac{PL^3}{4EI}δ=4EIPL3
C. δ=PL43EI\delta = \frac{PL^4}{3EI}δ=3EIPL4
D. δ=PL2EI\delta = \frac{PL^2}{EI}δ=EIPL2
