Multiple Choice Questions Civil Engineering

Multiple Choice Questions Civil Engineeringbased on IES 2010 questions MCQ Civil Engineering quiz1. The live load for a sloping roof with slope 15°, where access is not provided to the roof,is taken asA 0.65 kN/rn2

B. 0.75 kN/ rn2

C. 1.35 kN/ rn2

D. 1.50 kN/ rn2

2. The batten plates used to connect the components of a built-up-column are designed to resistA Longitudinal shear onlyB. Transverse shear onlyC. Longitudinal shear and moment arising from transverse shearD. Vertical shear only3.The duration of any activity in case of a PERT programme is calculated as a weighted average of three time estimates namely the optimistic time to , the pessimistic time tp and the most probable time tm which is given as

4. In ISMC 400 channels placed back to backat a spacing of 26 cm carry an axial load of160 tonnes. The lacing system should be designed to resist a transverse shear ofA 16 tonnesB. 12 tonnesC. 8 tonnesD. 4 tonnes5. Consider the following statements of network:1. Only one time estimate is required for each activity.2. Three time estimates for each activity.3. Time and cost are both controlling factors.4. It is build-up of event-oriented diagram.Which of the above statements are correctly applicable to CPM network?A 1 and 3B. 1 and 2C. 2 and 4D 3 and 46. If a simply supported concrete beam, prestressed with a force of 2500 kN, is designed by load balancing concept for an effective span of 10 m and to carry a total load of 40 kN/m, the central dip of the cable profile should beA 100mmB. 200 mm

C. 300mmD. 400 mm7. A circular shaft which has a diameter of 100 mm is subjected to a torque of 5 kN-m. The shear stress, in N/mm2 , induced in the shaft would beA160/ΠB.120/ΠC.125/ΠD.80/Π8. Match List I with List II and select the correct answer using the code given below the lists:List I(Type)A. Single angle in roof trussesB. Double angles in roof trussesC. Single I section in columnsD. Double I section in columnsList II(RecommendedSlenderness ratio)1. 80 — 1502. 30—603. 100- 1804. 60 — 120CodesA B C DA 3 4 1 2B. 2 4 1 3C. 3 1 4 2D.2 1 4 39.

10. Consider the following statements relating to structural analysis1. Flexibility matrix and its transpose are equal.2. Elements of main diagonal of stiffness matrix are always positive.3. For unstable structures, coefficient in leading diagonal matrix can be negative.Which of the above statements is/are correct?A 1, 2 and 3B. 1 and 2 onlyC. 2 and 3 OnlyD. 3 only11.

12. Poisson’s ratio is defined as the ratio ofA Longitudinal stress and longitudinal strainB. Lateral strain and longitudinal strainC. Longitudinal stress and lateral stressD. Lateral stress and longitudinal stress13. Consider the following conditions with respect to plastic analysis :‘1. Sum of internal and external forces and moments must be equal to zero.2. At ultimate collapse load, the number of plastic hinges must be just enough to form a mechanism.Which of the above conditions is/are correct?A 1 onlyB. 2 onlyC. Neither 1 nor 2

D. Both land214. The base plate of a roof truss is attached to the concrete pier with the help of 16 mm diameter mild steel anchor bolts of grade fy = 250 MPa. What is the maximum pull the base can be subjected to, if the root area of bolt = 0.75 times shank area ?A 30 kNB. 67.5 kNC. 90 kND. 120 kN15. The maximum longitudinal pitch allowed inbolted joints of tension members isA 16 times the diameter of the boltB. 32 times the diameter of the boltC..16 times the thickness of the plateD. 32 times the thickness of the plate16. A father notes that when his teenage daughter uses the telephone she takes no loss than 5 minutes for a call but sometimes as much as an hour. 15 minutes calls are more frequent than calls of any other duration. If the daughter’s calls were to be represented as an activity in PERT project, the expected duration of each phone call is?A 89/6 minutesB. 101/6 minutesC.113/6 minutesD.125/6 minutes17

18.A propped cantilever of span L is subjected to a concentrated load at mid span. If Mp, isthe plastic moment capacity of the beam, the value of collapse load will beA. 12Mp/LB. 8Mp/LC 6Mp/LD. 4Mp/L19. In PERT analysis, the time estimate ofactivities correspond toA Normal distributionB. Poisson’s distributionC.β distributionD. Binomial distribution

20. Consider the following statements:1. Shape factor2. Length of the beam3. Type of loading4. Yield strength of materialWhich of these affect the influence length ofplastic hinge in a beam?A. 1 only .B. 1 and 3C. 2 and 3D. 3 and 421

22. Consider the following statements:1. PERT is activity-oriented and adopts deterministic approach.2. CPM is event-oriented and adopts probabilistic approach.3. PERT is event-oriented and adopts probabilistic approach.Which of the above statements is/are correct?A 1 onlyB. 1 and 2C. 2 and 3D. 3 only23

24.PERT calculator yield a project length of 60 weeks with a variance of 9 weeks. Probability factor, corresponding to 95% probability is 1.647; then the number of weeks required to complete, and project with a probability of 95% is,A 60.94B. 62.94C. 64.94D. 66.9425. For an I-beam, the shape factor is 1.12; the factor of safety in bending stress is 1.5. If the allowable stress is increased by 20% for wind or ,earthquake loads, then the load factor isA 1.10B. 1.25C. 1.35D 1.4026. A steel plate is 300 mm wide and 10 mm thick. A rivet of nominal diameter 18 mm is driven.

The net sectional area of the plate isA 1800 mm2 .B. 2805 mm2

C. 2820 mm2

D 3242 mm2

27. At a section along the span of a welded plate girder, in which the web is spliced, the bending moment, at a section is M. The girder is comprised of top flange; web and bottom flange plates all of equal areas. The share of the bending moment taken by splice plates would beA MB. M/LC. M/7D M/1328. Consider the following stipulations in designing a laced column1. Single lacing systems on opposite planes shall preferably be in the same direction so that one is the shadow of the other.2. Lacing bar should be a flat section.3. The slenderness ratio of the lacing bars for compression shall not exceed l80.4. Laced compression members are to be provided with tie plates at ends.Which of the above observations is/are correct?A 1 onlyB. 1 and 3C. 2 and 4,D. 1 and 429. At the location of a plastic hinge,A Radius of curvature is infiniteB. Curvature is infiniteC. Moment is infiniteD. Flexible stress is infinite

30

31. Consider the following statements:Entrainmnt of air in concrete is don so as to1. Increase theworkability.2. Increase the strength.3. Increasethe resistance to freezing and thawingWhich f the above satements s/are correct?. 1, 2 an 3B. 1 onlyC. 1 and 3 onlyD. 3 only32. Consider the followingstatements is work breakdown structure1. It is a graphial representation of entire programme.2. The To-Down approach to planning is adopted.3. The Don-Top approach to planning is adopted.. It is suitable for complex projects.Which f the aboe statemens is/are crrect?A.1 onlyB. 2 and 4C. 3 and 4D. 4 only33. If P is the percentage of water required for determination of normal consistency of cement, then percentage of water to be added for dterminaton of iniial settig time isA. 0.70PB. 0.75 PC. Q.80 PD. 0.85 P34. Consider the following statements rgarding the. slope of cost-time curve:1. It is given by difference between normal cos and crash cost divided by crash time.2. It is given by difference between crash cost and normal cost divided by differece between crash time and normal time.3. It is given by difference of crash cost nd normal cost divided by normal time.4. It is given by‘crash cost not divided by crash time.Which f the aboe statemets is/arecorrect?A 1 onlyB.2 and 3C. 2 onlyD. 3 and 435. Consider the following statements:1. The crushing strength of concrete i fully governed by water-cement ratio.2. Vibration has no effect on strength o concrete at high water-cement ratios.3. Workability of concrete is affeted by improper grading of aggregates.Which f the above tatements.is/ar correct?A. 1,2 ad 3

B. 2 and 3 onlyC. 2 onlyD.3 only36. The load carrying capacity of a column designed by working stress method is500 kN. The ultimate collapse load of the column isA 500 kNB. 662.5 kNC, 750kND.1100 kN37. Consider the following statements:1. Strength of concrete cube is inversely proportional to water-cement ratio.2. A rich concrete mix gives a higher. strength than a lean concrete mix since it has more cement content.3. Shrinkage cracks on concrete surface are due to excess water in mix.Which of the above statements is/are correct?A 1, 2 and 3B. 1 and 2 onlyC. 2 onlyD. 2 and 3 only38. A beam of symmetrical. I-section, made of structural steel has an overall depth. of 300 mm. If the flange stresses developed at the top and bottom of the beam are 1200 kg/cm2 . and 300 kg/cm2 . respectively, then the depth of neutral axis from the top of the beam would beA 250mmB.240mmC. 200 mmD. 180 mm39. Consider . the following statements:Admixtures are added to concrete to1. Increase its strength.2. Reduce heat of hydration.3. Delay the setting of cement.4. Reduce water-cement ratio.Which of the above statements is/are correct?A 1 onlyB. 1 and 2C. 2 and 3D. 3 and 4.40. A building contractor discovers from his record that in the last 200 slab castings his mixer machine broke down 21 times. During each breakdown, he had to pay on an average about Rs. 2,500 for idle labour. A standby mixer machine, if hired on the day of slab casting, would cost him Rs. 200 per day. The expected loss is more than the mitigation expense of hiring the mixer byA Rs. 151.50B. Rs. 241.50C. Rs. 262.50D. Rs. 283.50

41. A steel beam is replaced by a corresponding aluminium beam of same cross-sectional shape and dimensions, and is subjected to same loading. The maximum bending. stress willA Be unalteredB. IncreaseC. DecreaseD.Vary in proportion to their modulus of elasticity42

The distribution factors for members AE and AC of the box section areA 0.5 and 0.5B. 0.6 and 0.4C. 0.25 and 0.75D. 1 and zero43

44.Consider the following activities:1. Pouring of concrete2. Erection of formwork3. Curing of concrete4. Removal of formworkWhat is the correct sequence on a network of these activities?

A 1—2—3—4B.2— 1—4—3C.2—1—3 —4D.1—3—2—445. Which one of the following is relevant to Activity on Node (AON)?A. Dummy activities may be manyB. There will be no dummy activitiesC. It is used for quite complex projectD. It is easier to associate with time flow of activities46. Consider the following statements about theair entraining admixture in concrete:1. Improve workability2. Improve durability3. Reduce segregation during placing4. Decrease concrete densityWhich of the above statements are correct?A. 1,2,3and4B. 1 and 2onlyC. 2 and 3 onlyD. 3 and 4 only.47.

The RC slab, simply supported on all edges as in above figure, is subjected to a total UDL of 12 kN/m2. The maximum shear force! unit length along the edge ‘BC’ isA 16kNB. 12kNC. 8kND. 30kN48.

The above figure indicates a project network; the number at each activity represents its normal duration in days. The critical path is alongA 1—2—3—6—7— 8B. 1—2 —4—5—7 — 8C. l—2——5—7— 8D. 1—2—4—6—7 — 849.

50

In the above network, the duration of activities are written along their arrows. The critical path of the activities is alongA 1—2—3—5—7—8B. 1—2—3—6—7—8 .C. 1—2—4—5—7—8D. 1—2—3—4—5—7—8Answers:

1A2C3B4D5A6B7D8B9D

10B11A12B13D14A15C16D17B18C19C20B21A22D23D24C25D26B27C28D29B30D31C

32B33D34C35B36C37A38B39B40#41A42A43D44C45B46A47A48B49C50A