BSNL JTO CIVIL ENGINEERING PAPER SECTION-I
Posted by Er. AMIT DWIVEDI , , , , ,
  BSNL JTO CIVIL ENGINEERING PAPER:

Time Allowed: 3 Hrs.



Section-I



Question Number 1-20 carry 1 mark each


1. A brick laid with its length across the wall is known as a
(A) stretcher
(B) header
(C) closer
(D) bat 
2. Which of the following is not a mobile crane type?
(A) Bottom slewing tower crane
(B) Telescopic-boom truck mounted crane
(C) Crawler crane
(D) Lattice-boom truck mounted crane
3. A principle plane is a plane of
(A) minimum tensile stress
(B) maximum tensile stress
(C) maximum shear stress
(D) zero shear stress

4. (i) Rapid hardening Portland cement is used in mass concrete construction for lowering the heat of hydration.
  (ii) Rapid hardening Portland cement is blended cement.
Which of the following option is correct?
(A) (i) is false and (ii) is true
(B) (i) is true and (ii) is false
(C) Both (i) and (ii) is false
(D) Both (i) and (ii) is true
5. Which of the following statement is true?
(A) The nominal dimension of a brick is greater than its specified dimension by thickness of the mortar joint.
(B) The nominal dimension of a brick is less than its specified dimension by thickness of the mortar joint.
(C) The nominal dimension of a brick is equal to its specified dimension.
(D) The nominal dimension of a brick is less than its specified dimension by twice the thickness of the mortar joint.
6. Which of the following equipment is used primarily to excavate below the natural ground surface on which it rests?
(A) Dozer
(B) Scrapper
(C) Hoe
(D) Jaw crusher
7. The phenomenon in which, some of the water in the mix tends to rise to the freshly placed concrete is known as
(A) flash set
(B) bleeding
(C) setting
(D) hydration
8. In a network diagram, the early start time of an activity is
(A) the minimum of the late finish times of all its immediate predecessors
(B) the minimum of the early finish times of all its immediate predecessors
(C) the maximum of the late finish times of all its immediate predecessors
(D) the maximum of the early finish times of all its immediate predecessors
9. Which of the following compound is most widely used as an accelerating admixture in concrete?
(A) Sugar
(B) Calcium chloride
(C) Soluble zinc salts
(D) Synthetic detergents
10. Which method of compaction is appropriate for sand?
(A) Impact
(B) Pressure 
(C) Vibration
(D) Kneading
11. Partial safety factor for concrete and steel in limit state method of design of RC structures are assumed as
(A) 1.35 and 1.2 respectively
(B) 1.14 and 1.25 respectively
(C) 1.08 and 1.25 respectively
(D) 1.5 and 1.15 respectively
12. Which of the following is not a soft wood?
(A) Oak
(B) Fir
(C) Pine
(D) Spruce
13. In a network diagram, the total float of an activity is equal to
(A) (Late finish time)-(Late start time)
(B) (Late finish time)-(Early finish time)
(C) (Early finish time)-(Early start time)
(D) (Late start time)-( Early finish time)
14. As per IS 456 : 2000, the maximum spacing of steel bars in a reinforced concrete solid slab is
(A) 300 mm
(B) 450 mm
(C) 3 times effective depth or 300 mm whichever is less
(D) 3 times the effective depth
15. Which of the following is fly ash based blended cement?
(A) Portland slag cement
(B) Low-heat Portland cement
(C) Portland pozzolana cement
(D) Ordinary Portland cement
16. Which of the following test is performed on hardened concrete to assess the hardness of its surface?
(A) Rebound hammer test
(B) Ultrasonic pulse velocity test
(C) Initial surface absorption test
(D) Flexural test
17. In a PERT network, the optimistic time, pessimistic time and most likely time of an activity are 4 days, 16 days and 7 days respectively. What is the value of the expected duration of the activity?
(A) 27 days
(B) 8 days
(C) 12 days
(D) 19 days
18. (i) The addition of fly ash in concrete lowers the heat of hydration in concrete.
      (ii) The addition of fly ash in concrete reduces its permeability.
Which of the following option is correct?
(A) (i) is false and (ii) is true
(B) (i) is true and (ii) is false
(C) Both (i) and (ii) are false
(D) Both (i) and (ii) are true
19. The crack resulting in lengthwise separation of wood, occurring between and parallel to annual rings is known as
(A) check
 (B) knot
(C) split
(D) shake
20. Which of the following compound is mainly responsible for the early strength development of hydrated Portland cement?
(A) C3S
 (B) C2S
 (C) C3A
 (D) C4AF

                    Question Number 21-50 carry 2 marks each 
   21.  A cantilever beam of length l and flexural rigidity EI is subjected to a clockwise couple Mo at the free end. The downward deflection at the free end will be
(A) Mo l2 / 2 EI                    (B) Mo l2 / 4 EI                
(C) Mo l2 / 6 EI                   (D) Mo l2 / 8 EI
      22.  A simply supported beam of span L carries two vertical point loads W at L/3 from both ends. The equivalent uniformly distributed load to produce same maximum bending moment as that of the two concentrated loads on the beam is
(A) 4W/L                               (B) 3W/8                       
(C) 8W/3L                            (D) 4W/3L     
      23. A beam simply supported at the ends carries uniformly distributed load throughout the span. The depth/breadth ratio is 2:1. Now the same beam is used without any modification of cross-sectional area to carry the same uniformly distributed load but with depth/breadth ratio of 1:2. The ratio of maximum deflection of the first case to the second case is
(A)  1:2                               (B) 1:4                                      
(C) 2:1                                (D) 4:1
      25.  A two span continuous beam ABC (AB=BC) is fixed at A and freely supported at B and C. The beam is only loaded in the span BC. The flexural rigidities of two spans are equal and supports are at the same level. If MA and MB are the moments at supports A and B respectively, which of the following relationships is correct?
(A)  MA = MB                                                                   (C) MA = -2 MB
(B)  MA = 0.5 MB                                                             (D) MA = -0.5MB
      26.  A concrete beam of rectangular section of 300 mm X 500 mm is pre-stressed with 750 kN force, the centre of pre-stressing steel being 100 mm from the centroid and area of the cross-section about horizontal axis passing through the centroid and area of the cross-section are 3.125 X 109 mm4 and 1.5 X 105 mm2 respectively. Neglecting the effect of self weight, the stresses at top and bottom fibres are
(A) 5 MPa (compressive) and 12 MPa (compressive) respectively
(B)  3.4 MPa (tensile) and 12 MPa (compressive) respectively
(C) 1 MPa (tensile) and 11 MPa (compressive) respectively
(D) 2.5 MPa (tensile) and 14.5 MPa (compressive) respectively
      27.  In a two dimensional state of stress, direct stresses in x and y direction are +90 MPa and +40 MPA, and shear stress of --30 MPa. If Mohrs circle is drawn with scale of 1 cm = 10 MPa, then centre of Mohrs circle from the origin is located at a distance of
(A) 3.5 cm                           (B) 4.5 cm                         
(C) 7.5 cm                           (D) 6.5 cm
     28.  A propped cantilever is of length 6 m. The flexural rigidity of the beam is 10000 kN.m2. If the propped end undergoes a settlement of 12 mm, then magnitude of the moment induced at the fixed end is
(A) 20 kN.m                       (B) 16 kN.m                      
(C) 10 kN.m                       (D) 0
     30.  A beam of total length L2 is fixed at both the ends. There are two internal hinges, each is at one third of the span from either end. The beam carries uniformly distributed load w per m run throughout the entire span. The banding moment at the fixed support is
(A) w L2/ 7                       (B) w L2/ 9                 
(C) w L2/ 10                    (D)  w L2/ 12
33.  A sample of coarse aggregate has the following information :
Weight of oven dry sample = 565 gm, weight of wet (moist) sample = 600 gm, weight of sample in saturated surface dry condition = 580 gm. What are the values of water absorption  (%) and free moisture content?
(A) 2.65% and 3.54% respectively                         (C) 3.33% and 2.5% respectively
(B)  3.54% and 2.65% respectively                        (D) 2.5% and 3.33% respectively
      34.  For a concrete mix of 1 m3, the water, coarse aggregate and fine aggregate contents are 200 kg, 1200 kg and 600 kg respectively. The water to cement ratio (w/c ratio) by mass is 0.50 and the coarse aggregate content is reduced by 50 kg from their respective original values, what is the new w/c  ratio keeping in view that the fine aggregate content and the total quantity of all ingredients remain same in both cases?
(A) 0.61                             (B) 0.41                              
(C) 0.31                             (D) 0.51 
35.  What is the ratio of target mean strength at 28 days of M 25 grade of concrete to that of M 20 grade of concrete?Given, s = standard deviation= 4 N/mm2, t = a statistical value, corresponding to 5% of test results below the characteristic compressive strength = 1.65.
(A) 1.25                              (B) 1.37                             
(C) 1.18                              (D)0.8 
36.  The split-tension test is conducted on a concrete cylinder of length 0.3 m and diameter 0.15 m.The maximum load applied to the specimen is 200 kN. What is the value of split tensile strength?
(A) 2.83 N/mm2                                                               (C) 5.66 N/mm2
(B)  1.41 N/mm2                                                              (D) 4.24 N/mm2
      39.  A two span continuous beam AB and BC was subjected to concentrated load of 20 kN at middle of span BC. The deflection under the load was 0.02 m(downward) and that in the middle of the span AB was 0.01 m (upward). When 16 kN and 40 kN loads are applied simultaneously at the middle of the span AB and BC respectively, then downward deflection at the middle of span BC will be
(A) 0.016 m                          (B) 0.032 m                        
(C) 0.064 m                          (D) 0.08 m
       43.  A propped cantilever of span 3L is having plastic moment carrying capacity Mp. It carries a concentrated load at a distance of L from the fixed end. Collapse load for the beam is
(A) 2Mp / L                         (B) Mp / L                         
(C) 2.5Mp / L                     (D) 1.5Mp / L
      44.  In a RC beam of rectangular cross-section (breadth = 200 mm; effective depth = 350 mm), vertical stirrups 2-legged 8 mm diameter are provided at a spacing of 200 mm c/c. Given, cross-sectional area of 8 mm bar (Fe 415) = 50.3 mm2 , and design shear strength of concrete is 0.5 MPa, total shear capacity of the section will be
(A) 64.68 kN                       (B) 72.45 kN                          
(C) 115.38 kN                    (D) 98.56 kN
      45.  A beam of length L is fixed at both ends. The beam carries uniformly distributed load of intensity w per unit length covering the entire span. The points of contra-flexure are at
     (A) at mid         (B)  at the first end    (C) at the second end     (d) at both the end
     46.  A steel column of hollow circular cross-section (external diameter = D and internal diameter = d) hinged at both ends is subjected to compressive load. If the length of the column is L and modulus of elasticity of steel is E, the critical stress of column according to Eulers formula will be 
(A) (D2+ d2)                                         (C) (D2+ d2)                                             
       (B) (D2+ d2)                                       (D) (D2+ d2)  

     47.  A rivet of 20 mm diameter is used to connect 10 mm thick plate. The permissible stress for rivet in shear and bearing are 80 MPa and 250 MPa, respectively. The difference of rivet value in double and single shear is
(A) 29044 N                                 (B) 26875 N                          
(C) 24706 N                                (D) 23868 N
      48.  A semi-circular arch of radius R hinged at two ends and at the crown carries uniformly distributed load q per unit length. The normal thrust at the crown will be
(A) q R / 2                        (B) q R / 4                   
(C) q R / 8                         (D) q R
      49.  The effective length of fillet welded joint is 210 mm. If the size of the weld is 6 mm and permissible stress is 108 MPa, the safe load that the joint can transmit is
(A) 95256 N                              (B) 85256 N                             
(C) 78206 N                              (D) 108000 N
      50.  The ratio of maximum shear stress to average shear stress in a solid circular cross-section is
(A) 1.11                                         (B) 1.22                                
(C) 1.33                                         (D) 1.44

0 comments

Post a Comment

Followers