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MCQOPTIONS
This section includes 164 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The amount of reinformcement for main bars in a slab, is based upon |
| A. | minimum bending moment |
| B. | maximum bending moment |
| C. | maximum shear force |
| D. | minimum shear force. |
| Answer» C. maximum shear force | |
| 102. |
For M 150 mix concrete, according to I.S. specifications, local bond stress, is |
| A. | 5 kg/cm2 |
| B. | 10 kg/cm2 |
| C. | 15 kg/cm2 |
| D. | 20 kg/cm2 |
| Answer» C. 15 kg/cm2 | |
| 103. |
In a prestressed beam carrying an external load W with a bent tendon is having angle of inclination θ and prestressed load P. The net downward load at the centre is |
| A. | W - 2P cos θ |
| B. | W - P cos θ |
| C. | W - P sin θ |
| D. | W - 2P sin θ |
| Answer» E. | |
| 104. |
An under-reinforced section means |
| A. | Steel is provided at the under side only |
| B. | Steel provided is insufficient |
| C. | Steel provided on one face only |
| D. | Steel will yield first. |
| Answer» E. | |
| 105. |
In a simply supported slab the minimum spacing of distribution reinforcement, should be four times the effective thickness of the slab or |
| A. | 20 cm |
| B. | 30 cm |
| C. | 40 cm |
| D. | 50 cm |
| Answer» E. | |
| 106. |
Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by |
| A. | Rankine formula |
| B. | Marcus formula |
| C. | Rankine Grashoff formula |
| D. | Grashoff formula |
| Answer» D. Grashoff formula | |
| 107. |
The width of the flange of a T-beam should be less than |
| A. | one-third of the effective span of the T-beam |
| B. | distance between the centres of T-beam |
| C. | breadth of the rib plus twelve times the thickness of the slab |
| D. | least of the above. |
| Answer» E. | |
| 108. |
In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as |
| A. | a key |
| B. | a cut-off wall |
| C. | a rib |
| D. | all the above. |
| Answer» E. | |
| 109. |
The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of |
| A. | 10 mm |
| B. | 15 mm |
| C. | 20 mm |
| D. | 25 mm |
| Answer» E. | |
| 110. |
Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of |
| A. | h/4 |
| B. | h/3 |
| C. | h/2 |
| D. | 2h/3 |
| Answer» C. h/2 | |
| 111. |
According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is |
| A. | 5 kg/cm2 |
| B. | 10 kg/cm2 |
| C. | 15 kg/cm2 |
| D. | 20 kg/cm2 |
| Answer» B. 10 kg/cm2 | |
| 112. |
The minimum cube strength of concrete used for a prestressed member, is |
| A. | 50 kg/cm2 |
| B. | 150 kg/cm2 |
| C. | 250 kg/cm2 |
| D. | 350 kg/cm2 |
| Answer» E. | |
| 113. |
Distribution reinforcement in a simply supported slab, is provided to distribute |
| A. | load |
| B. | temperature stress |
| C. | shrinkage stress |
| D. | all the above. |
| Answer» E. | |
| 114. |
According to the steel beam theory of doubly reinforced beams |
| A. | tension is resisted by tension steel |
| B. | compression is resisted by compression steel |
| C. | stress in tension steel equals the stress in compression steel |
| D. | no stress is developed in compression concrete as well as in tension concrete |
| Answer» E. | |
| 115. |
The minimum head room over a stair must be |
| A. | 200 cm |
| B. | 205 cm |
| C. | 210 cm |
| D. | 200 cm |
| Answer» D. 200 cm | |
| 116. |
If W is weight of a retaining wall and P is the horizontal earth pressure, the factor of safety against sliding, is |
| A. | 1 |
| B. | 1.25 |
| C. | 1.5 |
| D. | 2 |
| Answer» D. 2 | |
| 117. |
For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 118. |
The design of a retaining wall assumes that the retained earth |
| A. | is dry |
| B. | is free from moisture |
| C. | is not cohesives |
| D. | consists of granular particles |
| Answer» E. | |
| 119. |
If the size of a column is reduced above the floor, the main bars of the columns, are |
| A. | continued up |
| B. | bent inward at the floor level |
| C. | stopped just below the floor level and separate lap bars provided |
| D. | all the above. |
| Answer» E. | |
| 120. |
A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is |
| A. | 2.5 |
| B. | 2 |
| C. | less than 2 |
| D. | less than 2.5 |
| Answer» B. 2 | |
| 121. |
For initial estimate for a beam design, the width is assumed |
| A. | 1/15th of span |
| B. | 1/20th of span |
| C. | 1/25th of span |
| D. | 1/30th of span |
| Answer» E. | |
| 122. |
In a prestressed member it is advisable to use |
| A. | low strength concrete only |
| B. | high strength concrete only |
| C. | low strength concrete but high tensile steel |
| D. | high strength concrete and high tensile steel |
| Answer» E. | |
| 123. |
The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm2 respectively. If m = 15, the depth of its neutral axis is |
| A. | 20 cm |
| B. | 25 cm |
| C. | 30 cm |
| D. | 35 cm |
| Answer» D. 35 cm | |
| 124. |
If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is |
| A. | 0.005 |
| B. | 0.006 |
| C. | 0.007 |
| D. | 0.008 |
| Answer» D. 0.008 | |
| 125. |
The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon |
| A. | breadth of the rib |
| B. | overall thickness of the rib |
| C. | centre to centre distance between T-beams |
| D. | span of the T-beam |
| Answer» E. | |
| 126. |
The Young's modulus of elasticity of steel, is |
| A. | 150 KN/mm2 |
| B. | 200 KN/mm2 |
| C. | 250 KN/mm2 |
| D. | 275 KN/mm2 |
| Answer» E. | |
| 127. |
Piles are usually driven by |
| A. | diesel operated hammer |
| B. | drop hammer |
| C. | single acting steam hammer |
| D. | all the above. |
| Answer» E. | |
| 128. |
In a combined footing if shear stress does not exceed 5 kg/cm2, the nominal stirrups provided are |
| A. | 6 legged |
| B. | 8 legged |
| C. | 10 legged |
| D. | 12 legged |
| Answer» C. 10 legged | |
| 129. |
As the percentage of steel increases |
| A. | depth of neutral axis decreases |
| B. | depth of neutral axis increases |
| C. | lever arm increases |
| D. | lever arm decreases |
| Answer» C. lever arm increases | |
| 130. |
Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than |
| A. | 42 diameters from the centre of the column |
| B. | 42 diameters from the inner edge of the column |
| C. | 42 diameters from the outer edge of the column |
| D. | 24 diameter from the centre of the column |
| Answer» D. 24 diameter from the centre of the column | |
| 131. |
The diameter of the column head support a flat slab, is generally kept |
| A. | 0.25 times the span length |
| B. | 0.25 times the diameter of the column |
| C. | 4.0 cm larger than the diameter of the column |
| D. | 5.0 cm larger than the diameter of the column |
| Answer» B. 0.25 times the diameter of the column | |
| 132. |
Cantilever retaining walls can safely be used for a height not more than |
| A. | 3 m |
| B. | 4 m |
| C. | 5 m |
| D. | 6 m |
| Answer» E. | |
| 133. |
If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is |
| A. | 28 d |
| B. | 38 d |
| C. | 48 d |
| D. | 58 d |
| Answer» E. | |
| 134. |
If the tendon is placed at an eccentricity e below the centroidal axis of the lon-gitudial axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge |
| A. | is increased by |
| B. | is increased by |
| C. | is decreased by |
| D. | remains unchanged. |
| Answer» D. remains unchanged. | |
| 135. |
The effective span of a simply supported slab, is |
| A. | distance between the centres of the bearings |
| B. | clear distance between the inner faces of the walls plus twice the thickness of the wall |
| C. | clear span plus effective depth of the slab |
| D. | none of these. |
| Answer» C. clear span plus effective depth of the slab | |
| 136. |
The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt, |
| A. | is safe in shear |
| B. | is unsafe in shear |
| C. | is over safe in shear |
| D. | needs redesigning. |
| Answer» C. is over safe in shear | |
| 137. |
The maximum shear stress (qmax) in a rectangular beam is |
| A. | 1.25 times the average |
| B. | 1.50 times the average |
| C. | 1.75 times the average |
| D. | 2.0 times the average |
| Answer» C. 1.75 times the average | |
| 138. |
Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at |
| A. | supports |
| B. | mid span |
| C. | every section |
| D. | quarter span. |
| Answer» C. every section | |
| 139. |
An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is |
| A. | 49.9 kg/cm2 |
| B. | 100 kg/cm2 |
| C. | 250 kg/cm2 |
| D. | 175 kg/cm2 |
| Answer» B. 100 kg/cm2 | |
| 140. |
If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is |
| A. | 2800/C |
| B. | 2300/2C |
| C. | 2800/3C |
| D. | 2800/C2 |
| Answer» D. 2800/C2 | |
| 141. |
A pre-stressed concrete member is preferred because |
| A. | its dimensions are not decided from the diagonal tensile stress |
| B. | large size of long beams carrying large shear force need not be adopted |
| C. | removal of cracks in the members due to shrinkage |
| D. | all the above. |
| Answer» E. | |
| 142. |
Dimensions of a beam need be changed if the shear stress is more than |
| A. | 10 kg/cm2 |
| B. | 15 kg/cm2 |
| C. | 20 kg/cm2 |
| D. | 25 kg/cm2 |
| Answer» D. 25 kg/cm2 | |
| 143. |
If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than |
| A. | 4 mm |
| B. | 5 mm |
| C. | 6 mm |
| D. | 8 mm |
| Answer» C. 6 mm | |
| 144. |
A raft foundation is provided if its area exceeds the plan area of the building by |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» E. | |
| 145. |
For stairs spanning horizontally, the minimum waist provided is |
| A. | 4 cm |
| B. | 6 cm |
| C. | 8 cm |
| D. | 10 cm |
| Answer» E. | |
| 146. |
The weight of a foundation is assumed as |
| A. | 5% of wall weight |
| B. | 7% of wall weight |
| C. | 10% of wall weight |
| D. | 12% of wall weight |
| Answer» D. 12% of wall weight | |
| 147. |
The self-weight of the footing, is |
| A. | not considered for calculating the upward pressure on footing |
| B. | also considered for calculating the upward pressure on footihg |
| C. | not considered for calculating the area of the footing |
| D. | both (b) and (c) |
| Answer» B. also considered for calculating the upward pressure on footihg | |
| 148. |
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed |
| A. | 10 mm |
| B. | 15 mm |
| C. | 20 mm |
| D. | 25 mm |
| Answer» E. | |
| 149. |
An R.C.C. column is treated as long if its slenderness ratio is greater than |
| A. | 30 |
| B. | 35 |
| C. | 40 |
| D. | 50 |
| Answer» E. | |
| 150. |
A ribbed slab is provided for |
| A. | a plain ceiling |
| B. | thermal insulation |
| C. | acoustic insulation |
| D. | all the above. |
| Answer» E. | |