Description : The ultimate average anchorage bond stress for plain bars in tension is _______ if the grade of concrete is M20 [ A ] 1.60 N/mm2 [ B ] 1.92 N/mm2 [ C ] 2.24 N/mm2 [ D ] 2.40 N/mm2
Last Answer : [ B ] 1.92 N/mm2
Description : As per IS: 456, permissible bond stress for plain bars in tension, in working stress method, where M20, is the grade of concrete [ A ] 0.6 N/mm2 [ B ] 0.8 N/mm2 [ C ] 1.0 N/mm2 [ D ] 1.2 N/mm2
Last Answer : [ B ] 0.8 N/mm2
Description : As per IS: 456, permissible direct compressive stress M20 grade concrete in working stress method of designer [ A ] 5.0 N/mm2 [ B ] 7.0 N/mm2 [ C ] 10.0 N/mm2 [ D ] 20.0 N/mm2
Last Answer : [ A ] 5.0 N/mm2
Description : In working stress method of design, permissible compressive bending stress for M20 grade concrete is given by [ A ] 5.0 N/mm2 [ B ] 7.0 N/mm2 [ C ] 10.0 N/mm2 [ D ] 20 N/mm2
Last Answer : [ B ] 7.0 N/mm2
Description : As per IS;456, in working stress method of design, permissible tensile stress for M20 grade concrete is given by [ A ] 1. 2 N/mm2 [ B ] 1.5 N/mm2 [ C ] 2.0 N/mm2 [ D ] 2.8 N/mm2
Last Answer : [ D ] 2.8 N/mm2
Description : As per IS:456, maximum shear stress for M20 glade concrete in working stress method is [ A ] 1.6 N/mm2 [ B ] 1.8 N/mm2 [ C ] 2.0 N/mm2 [ D ] 2.2 N/mm2
Last Answer : [ B ] 1.8 N/mm2
Description : As per IS :456-1978, the permissible value of bond – stress for M15 grade of concrete is (a) 0.5 N/mm2 (b) 1 N/mm2 (c) 1.5 N/mm2 (d) 2 N/mm2
Last Answer : (b) 1 N/mm2
Description : The average permissible stress in bond for plain bars in tension is (A) Increased by 10% for bars in compression (B) Increased by 25% for bars in compression (C) Decreased by 10% for bars in compression (D) Decreased by 25% for bars in compression
Last Answer : Answer: Option B
Description : The bond stress for plain bars in compression is more than that for bars in tension by [ A ] 25% [ B ] 40% [ C ] 60% [ D ] 50%
Last Answer : [ A ] 25%
Description : If a concrete column 200 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 ... 15 Ec (A) 264 MN (B) 274 MN (C) 284 MN (D) 294 MN
Last Answer : (C) 284 MN
Description : If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be (A) 0.35 d (B) 0.40 d (C) 0.45 d (D) Dependent on grade of concrete also
Description : Maximum allowable shear stress for M25 grade concrete is [ A ] 2.5 N/mm2 [ B ] 2.8 N/mm2 [ C ] 3.1 N/mm2 [ D ] 3.5 N/mm2
Last Answer : [ C ] 3.1 N/mm2
Description : In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by (A) 10 % (B) 20 % (C) 30 % (D) 40 %
Last Answer : (D) 40 %
Description : Inc case of prestressed concrete members, the bursting stresses develop at (a) Bond zone (b) Maximum bending moment zone (c ) Maximum shear stress zone (d) Anchorage zone
Last Answer : (d) Anchorage zone
Description : As per IS: 1139, permissible stress in compression steel reinforcement for High Yield strength deformed bars is [ A ] 140 N/mm2 [ B ] 190 N/mm2 [ C ] 230 N/mm2 [ D ] 415 N/mm2
Last Answer : [ B ] 190 N/mm2
Description : The ratio of differenct ingredients (cement, sand and aggregate) in concrete mix of grade M20 is. (a) 1:1:2 (b) 1:1.5:2 (c) 1:2:4 (d) 1:3:6
Last Answer : (b) 1:1.5:2
Description : As per 1S: 456-2000, minimum grade of concrete in seat water constructions is [ A ] M20 [ B ] M25 [ C ] M30 [ D ] M50
Last Answer : [ C ] M30
Description : Minimum grade of concrete for R.C.C. should be _________ , as per IS. 456-2000 [ A ] M10 [ B ] M14 [ C ] M20 [ D ] M25
Last Answer : [ C ] M20
Description : The bond stress for deformed bars is more than that in plain bars by [ A ] 25% [ B ] 40% [ C ] 60% [ D ] 50%
Last Answer : [ B ] 40%
Description : The ratio of bond stress for HYSD bars to that of plain bars [ A ] 0.714 [ B ] 0.9 [ C ] 1.4 [ D ] 1.8
Last Answer : [ C ] 1.4
Description : What is the shear stress acting on the outer surface of a hollow shaft subjected to a torque of 100 Nm?(The inner and outer diameter of the shaft is 15 mm and 30 mm respectively.) a. 50.26 N/mm2 b. 40.24 N/mm2 c. 20.120 N/mm2 d. 8.74 N/mm2
Last Answer : c. 20.120 N/mm2
Description : The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than (A) 18 bar diameters (B) 24 bar diameters (C) 30 bar diameters (D) 36 bar diameters
Last Answer : Answer: Option C
Description : End anchorage of bars is taken as the greater of [ A ] Effective depth or 12 times the diameter of bar [ B ] Effective depth or 16 times the diameter of bar [ C ] Effective depth of 24 times the diameter of bar [ D ] Effective depth of 48 times the diameter of bar
Last Answer : [ A ] Effective depth or 12 times the diameter of bar
Description : If the bond stress developed in a reinforced concrete beam is more than permissible value, it can be brought down by. (a) Increasing the depth of beam (b) Increasing the number of bars. (c) Decreasing the diameter of the bars (d) All of these
Last Answer : (d) All of these
Description : When the steel bars are embedded in concrete. The concrete after setting, adheres to the surface of the bars and thus resist any force that tends to pull or push this road. The intensity of this adhesive force is called. (a) Bond stress (b) Shear stress (c) Compressive stress (d) All of these
Last Answer : (a) Bond stress
Description : A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the ... (A) 411 N mm (B) 511 N mm (C) 611 N mm (D) 711 N mm
Last Answer : (C) 611 N mm
Description : The ultimate tensile strength of structural mild steel is about (A) 160 N/mm² (B) 260 N/mm² (C) 420 N/mm² (D) 520 N/mm
Description : A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm2 and that of brass bar is 3000 mm2 . These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 ... 6 N/mm2 s = 12 N/mm2 (D) b = 5 N/mm2 s = 10 N/mm
Last Answer : (A) b = 10 N/mm2 s = 20 N/mm
Description : As per IS:1139, the characteristic yield strength for cold twisted deformed bars is [ A ] 250 N/mm2 [ B ] 415 N/mm2 [ C ] 500 N/mm2 [ D ] 550 N/mm2
Last Answer : [ C ] 500 N/mm2
Description : As per IS:1139, the characteristic yield strength for hot rolled High yield strength deformed bars is [ A ] 250 N/mm2 [ B ] 415 N/mm2 [ C ] 500 N/mm2 [ D ] 550 N/mm2
Last Answer : [ B ] 415 N/mm2
Description : Which of the following grade is not recommended by IS 456-1978? (a) M10 (b) M20 (c) M40 (d) M55
Last Answer : (d) M55
Description : If plain bars are used, the area of distribution reinforcement in slabs should not less than (a) 0.12% of the gross area f concrete (b) 0.15% of the gross area of concrete (c) 0.18% of the gross area of concrete (d) 0.20% of the gross area of concrete
Last Answer : (b) 0.15% of the gross area of concrete
Description : Minimum compressive strength of cement required at the age of 3 days for ordinary Portland cement of grade 33 is [ A ] 1.15 N/mm2 [ B ] 11.5 N/mm2 [ C ] 2.10 N/mm2 [ D ] 21 N/mm2
Last Answer : [ B ] 11.5 N/mm2
Description : The effective depth of a singly reinforced rectangular beam is 300mm. the section is over-reinforced and the neutral axis is 120mm below the top. If the maximum stress attained by concrete is 5N/mn2 and the modular ratio ... in the steel will (a) 130N/mm2 (b) 135N/mm2 (c) 160N/mm2 (d) 180N/mm2
Last Answer : (b) 135N/mm2
Description : A rod, 120cm long and of diameter 3.0 cm is subjected to an axial pull of 18 kN. The stress in N/mm2 is. a. 22.57 b. 23.47 c. 24.57 d. 25.47
Last Answer : d. 25.47
Description : What is the shear stress acting along the neutral axis of triangular beam section, with base 60 mm and height 150 mm, when shear force of 30 kN acts? a. 15.36 N/mm2 b. 10.6 N/mm2 c. 8.88 N/mm2 d. Insufficient data
Last Answer : c. 8.88 N/mm2
Description : What is the maximum principle stress induced in a solid shaft of 40 mm diameter which is subjected to both bending moment and torque of 300 kN.mm and 150 kN.mm respectively? a. 21.69 N/mm2 b. 28.1 N/mm2 c. 50.57 N/mm2 d. 52.32 N/mm2
Last Answer : c. 50.57 N/mm2
Description : 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
Last Answer : Answer: Option D
Description : In a singly reinforced concrete beam, as the load increases. (a) Only concrete will resist tension (b) Only steel bars will resist tension. (c) Both concrete and steel will resist tension. (d) Both concrete and steel will resist compression.
Last Answer : (b) Only steel bars will resist tension.
Description : In a singly reinforced concrete beam, if the load is vey small. (a) Only concrete will resist tension (b) Only steel bars will resist tension. (c) Both concrete & steel will resist tension. (d) Both concrete & steel will resist compression.
Last Answer : (c) Both concrete & steel will resist tension.
Description : For lime concrete, (A) Slump is 50 to 75 mm (B) Flexural strength at 90 days is 0.2 N/mm2 (C) Compressive strength at 90 days is 1.5 N/mm2 (D) All the above
Description : As per IS: 456-2000, recommended value for standard deviation for concrete mix from M30 to M50 is [ A ] 1 N/mm2 [ B ] 2 N/mm2 [ C ] 4 N/mm2 [ D ] 5 N/mm2
Last Answer : [ D ] 5 N/mm2
Description : As per IS: 456-2000, modulus of elasticity of concrete (in N/mm2) is given by [ A ] 5700 vfCK [ B ] 5000 vfCK [ C ] 3700 vfCK [ D ] 3000 vfCK
Last Answer : [ B ] 5000 vfCK
Description : Pick up the correct statement from the following: (A) Plain cement concrete is equally strong in compression as well as in tension (B) Slump test is performed to check concrete strength (C ... D) Fineness modulus is the index number expressing the relative sizes of both coarse and fine aggregates
Last Answer : Option D
Description : What is the average shear stress acting on a rectangular beam, if 50 N/mm2is the maximum shear stress acting on it? a. 31.5 N/mm2 b. 33.33 N/mm2 c. 37.5 N/mm2 d. 42.5 N/mm2
Last Answer : b. 33.33 N/mm2
Description : Consider the following salient points in a stress-strain curve of a mild steel bar: 1. Yield point 2. Braking point 3. Yield plateau 4 . Proportionality limit 5. Ultimate point The correct sequence in which they occur while testing the mild ... , 5 and 2 (c) 4, 1, 3, 5 and 2 (d) 1, 4, 2, 3 and 5
Last Answer : (c) 4, 1, 3, 5 and 2
Description : 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
Description : Stress may be expressed in Newtons (A) Per millimetre square (N/mm2 ) (B) Per centimetre square (N/cm2 ) (C) Per metre square (N/m2 ) (D) None of these
Last Answer : (A) Per millimetre square (N/mm2 )
Description : A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so that the maximum bending stress is 75 N/mm². If the slope at the ends is 0.005 radian and the value of E = 0.2 ... joist, is (A) 200 mm (B) 250 mm (C) 300 mm (D) 400 mm
Last Answer : (D) 400 mm