Description : Nominal cover for M30 grade concrete in moderate exposure is (as per IS:456-2000) [ A ] 20 mm [ B ] 30 mm [ C ] 45 mm [ D ] 50 mm
Last Answer : [ B ] 30 mm
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 : 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 : In moderate exposure , the allowable crack width at the surface of concrete should be [ A ] 0.20 mm [ B ] 0.30 mm [ C ] 0.45 mm [ D ] 0.55 mm
Last Answer : [ A ] 0.20 mm
Description : Permissible width of crack at the surface of concrete for „moderate‟ environmental conditions according to IS : 456-2000 is [ A ] 0.1 mm [ B ] 0.2 mm [ C ] 0.3 mm [ D ] 0.4 mm
Last Answer : [ B ] 0.2 mm
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 : 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 : For reinforced concrete work, aggregates having a nominal size of -------- are generally used [ A ] 20 mm [ B ] 40 mm [ C ] 50 mm [ D ] 60 mm
Last Answer : [ A ] 20 mm
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 : 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, 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 : 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/cm
Last Answer : Answer: Option A
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 : Maximum distance between expansion joints in structures as per IS: 456 1978 is (A) 20 m (B) 30 m (C) 45 m (D) 60 m
Last Answer : (C) 45
Description : According to IS: 456-2000, limiting value of yield strain for Fe415 grade steel is [ A ] 0.031 [ B ] 0.0031 [ C ] 0.038 [ D ] 0.0038
Last Answer : [ D ] 0.0038
Description : According to IS:456-2000, Limiting value of yield strain for Fe250 grade steel is [ A ] 0.031 [ B ] 0.0031 [ C ] 0.038 [ D ] 0.0038
Last Answer : [ B ] 0.0031
Description : In any case, the minimum diameter of the link in a column, according to IS:456-2000 is [ A ] 5 mm [ B ] 6 mm [ C ] 8 mm [ D ] 10 mm
Last Answer : [ B ] 6 mm
Description : The diameter of the stirrups according to IS : 456-2000 should not be less than [ A ] 5 mm [ B ] 6 mm [ C ] 8 mm [ D ] 10 mm
Description : According to IS: 456-2000 Maximum spacing of shear reinforcement in no case shall not exceed [ A ] 250 mm [ B ] 300 mm [ C ] 350 mm [ D ] 450 mm
Last Answer : [ B ] 300 mm
Description : According to IS:456-2000, the maximum allowable crack width (in mm) for mild type of environmental condition [ A ] 0.1 [ B ] 0.2 [ C ] 0.25 [ D ] 0.3
Last Answer : [ D ] 0.3
Description : According to IS: 456-2000 spacing of vertical stirrups for shear reinforcement has been limited to [ A ] 0.75 d [ B ] 450 mm [ C ] lesser of 0.75 d or 300 mm [ D ] lesser of 0.75d or 450 mm
Last Answer : [ C ] lesser of 0.75 d or 300 mm
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 : The grade of concrete not recommended by I.S. : 456, is (A) M 100 (B) M 200 (C) M 300 (D) M 500
Last Answer : (D) M 500
Description : According to IS:456-2000, the total acid soluble chlorides in concrete is restricted to________ of concrete [ A ] 0.2 kg/m3 [ B ] 0.4 kg/m3 [ C ] 2 kg/m3 [ D ] 4 kg/m3
Last Answer : [ B ] 0.4 kg/m3
Description : According to IS:456-2000, the following type of environments are considered for durability of concrete [ A ] two [ B ] four [ C ] five [ D ] six
Last Answer : [ C ] five
Description : According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than (A) 20 cm (B) 30 cm (C) 40 cm (D) 75 cm
Last Answer : Answer: Option B
Description : Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is (A) 28 liters (B) 30 liters (C) 32 liters (D) 34 liters
Last Answer : Answer: Option C
Description : If in 2000 nominal GDP is = `70000 Crore and the prices in 2000 were 40% more than the real GDP in 2000 using 1996 as a base year is (a) `45,000 Crore ; (b) `50,000 Crore ; (c) `42,000 Crore ; (d) `98000 Crore
Last Answer : (b) `50,000 Crore ;
Description : In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for (A) 20 times (B) 25 times (C) 30 times (D) 50 time
Description : As per IS: 456-2000, the maximum size of aggregate is [ A ] 1/4 of maximum thickness of member [ B ] 1/4 of minimum thickness of member [ C ] 1/5 of maximum thickness of member [ D ] 1/5 of minimum thickness of member
Last Answer : [ B ] 1/4 of minimum thickness of member
Description : According to IS: 456-2000, the span/overall depth ratio for a continuous two-way slab in order to control deflection is given by [ A ] 20 [ B ] 28 [ C ] 32 [ D ] 40
Last Answer : [ C ] 32
Description : In “Severe exposure” the allowable crack width at the surface of concrete should not exceed [ A ] 0.1 mm [ B ] 0.2 mm [ C ] 0.3 mm [ D ] 0.4 mm
Last Answer : [ A ] 0.1 mm
Description : As per IS:456-1978, the concrete mixes are designated into (a) 4 grades (b) 5 grades (c) 6 grades (d) 7 grades
Last Answer : (d) 7 grades
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, the strength of concrete sample is less than [ A ] The characteristic strength minus 1.35times the standard deviation [ B ] 0.80 times the characteristic strength [ C ] Greater of (a) and (b) [ D ] None of the above
Last Answer : [ C ] Greater of (a) and (b)
Description : According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than (A) 5 cm (B) 10 cm (C) 15 cm (D) 20 cm
Description : To prevent movement of moisture from sub-grade to road pavement at the same level as that of water-table, thickness of a cut off layer of coarse sand, is (A) 15 cm (B) 20 cm (C) 30 cm (D) 45 cm
Description : Minimum cover to longitudinal steel in a column should be (if the diameter of bar, Ø> 12mm) [ A ] 25 mm [ B ] 30 mm [ C ] 40 mm [ D ] 50 mm
Last Answer : [ C ] 40 mm
Description : The concrete slump recommended for beams and slabs; is (A) 25 to 50 mm (B) 25 to 75 mm (C) 30 to 125 mm (D) 50 to 100 mm
Description : The concrete slump recommended for foundations, is (A) 25 to 50 mm (B) 30 to 125 mm (C) 50 to 100 mm (D) 75 to 125 mm
Description : The nominal thickness of an expansion joint in brick walls, is kept more than (A) 5 mm (B) 10 mm (C) 15 mm (D) 20 mm
Description : Minimum grade of concrete to be used in reinforced concrete as per IS: 4561978 is (A) M 15 (B) M 20 (C) M 10 (D) M 25
Description : Suggest the minimum grade of concrete for following exposure condition. i) RCC work ii) Water retaining structure iii) Sea water construction iv) Pre-stressed concrete
Last Answer : Minimum grade of concrete for following exposure condition: i) RCC work = M 20 ii) Water retaining structure = M 25 iii) Sea water construction = M 20 for PCC and M 30 for RCC iv) Pre-stressed concrete = M 30
Description : The minimum cover to the ties or spirals should not be less than (A) 15 mm (B) 20 mm (C) 25 mm (D) 50 mm
Description : The compression in concrete (fc) at failure is given by [ A ] 0.30 fck [ B ] 0.45 fck [ C ] 0.50 fck [ D ] 0.75 fck
Last Answer : [ B ] 0.45 fck
Description : If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed (A) 10 cm (B) 15 cm (C) 20 cm (D) 25 cm