Engineering Questions with Answers - Multiple Choice Questions

# Civil Engineering Drawing MCQ’s – Structural Designing and Thumb Rules

1 - Question

The maximum area of tension reinforcement in beams shall not exceed?
a) 1.5%
b) 4%
c) 7%
d) 0.5%
Explanation: If tensile reinforcement of beam should exceed 4% of total gross area then some crack will be developed in concrete.

2 - Question

The diameter of longitudinal bars of a column should never be less than?
a) 12 mm
b) 6 mm
c) 10 mm
d) 8 mm
Explanation: Minimum diameter of longitudinal bar in RCC column shall not be less than 12mm (IS456:2000, cl 26.5.3.1 d). Indian standards specify 12mm as the least diameter of a vertical bar and 5mm as the least diameter of lateral bar or stirrup.

3 - Question

The number of treads in a flight is equal to _________
a) risers in the flight
b) risers plus one
c) risers minus one
d) risers plus three
Explanation: It is often not simply the sum of the individual tread lengths due to the nosing overlapping between treads. If there are N steps, the total run equals N-1 times the going: the tread of the last step is part of a landing and is not counted.

4 - Question

A foundation rests on __________
a) base of the foundation
b) foundation soil
Explanation: A foundation (or, more commonly, base) is the element of an architectural structure which connects it to the ground, and transfers loads from the structure to the ground. Foundations are generally considered either shallow or deep. Foundation engineering is the application of soil mechanics and rock mechanics (Geotechnical engineering) in the design of foundation elements of structures

5 - Question

For initial estimate for a beam design, the width is assumed?
a) 1/10th of span
b) 1/30th of span
c) 1/15th of span
d) 1/5th of span
Explanation: Design codes prescribe beam width limitations to minimise the shear lag effect on the formation of full-width plastic hinges and achieving the expected capacity. However, owing to insufficient experimental and analytical studies, empirical design formulas for the beam width limitation, with remarkably different results, have been implemented in different design codes. In this paper, parametric studies of the influence of key parameters on the behaviour of wide beam–column connections are conducted based on available test results. An effective beam-width model is analytically developed using the equivalent-frame representation, where the effects of torsion of transverse beams and flexure around the joint core are considered. The validity of the model is verified using flexural strengths of test specimens, covering a wide range of design parameters.

6 - Question

Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at ____________
a) mid span
b) supports
c) every section
d) quarter span
Explanation: Since BM is maximum at midspan, design should be done for maximum bending moment so that it will take care for other section. Moment formula we are using is (wl2/8) which mid span moment.

7 - Question

High strength concrete is used in prestressed member?
a) To ovecome bursting stresses at the ends
b) To provide high bond stresses
c) To overcome cracks due to shrinkage
d) To overcome bursting stresses, provide high bond stresses and overcome cracks
Explanation: The primary difference between high-strength concrete and normal-strength concrete relates to the compressive strength that refers to the maximum resistance of a concrete sample to applied pressure. Although there is no precise point of separation between high-strength concrete and normal-strength concrete, the American Concrete Institute defines high-strength concrete as concrete with a compressive strength greater than 6,000 psi.

8 - Question

The advantage of reinforced concrete is due to ___________
a) monolithic character
b) moulding in any desired shape
c) fire-resisting and durability
d) monolithic character, moulding any shape and fire-resisting
Explanation: Reinforced concrete (RC) is a composite material in which concrete’s relatively low tensile strength and ductility are counteracted by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel reinforcing bars (rebar) and is usually embedded passively in the concrete before the concrete sets. Reinforcing schemes are generally designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure. Modern reinforced concrete can contain varied reinforcing materials made of steel, polymers or alternate composite material in conjunction with rebar or not. Reinforced concrete may also be permanently stressed (in tension), so as to improve the behaviour of the final structure under working loads.

9 - Question

Cracking of the concrete section is nearly impossible to prevent.
a) True
b) False