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HIL Engineering questions and answers
1. A rectangular beam of length I supported at its two ends carries a central concentrated load W at its centre. The maximum deflection occurs
at the ends
at 1/3 from both ends
at the mid span-Answer
at 1/4 from both ends
.
2. If the depth is kept constant for beam of uniform strength then its width will vary proportional to
M-Answer
Sqrt(M)
M^2
M^3
.
3. When a beam deflects into a uniform strength then its width will vary proportional to
I/2R
I/8R
I^2 /8R-Answer
I^2 /2d
.
4. The longitudinal stress in a thin cylindrical shell is
Pd/4t-Answer
Pd/2t
Pt/4d
Pt/2d
.
5. The ratio of maximum shear stress and average shear stress for a rectangular section is
1.5-Answer
2
2.5
3
.
6. A fixed beam of span L carries a central point load W. The maximum sagging bending moment in the beam is
WL/2
WL/4-Answer
WL/8
WL/16
.
7. Air entrainment in the concrete increases
workability
strength-Answer
the effects of temperature
the unit weight
.
8. The relation between modulus of rupture Fcr and characteristic strength of concrete Fck is given by
Fcr = 0.35 S Fck-Answer
Fcr = 0.5 S Fck
Fcr = 0.7 S Fck
Fcr = 1.2 S Fck
.
9. The compressive strength of 100 mm cube as compared to 150 mm cube is always
less
more
equal-Answer
may be any of the above
.
10. For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory
is always less than 1
is always greater than 1-Answer
can be more than 1
can be less than 1
.
11. For bars in tension a standard hook has an anchorage value equivalent to a strength length of
8
12
16-Answer
24
.
12. Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than
350 Kg/cm^2 and 420 Kg/cm^2
420 Kg/cm^2 and 530 Kg/cm^2-Answer
420 Kg/cm^2 and 350 Kg/cm^2
530 Kg/cm^2 and 420 Kg/cm^2
.
13. The creep strains are
caused due to dead loads only-Answer
caused due to live loads only
caused due to both dead and live load
independent of loads
.
14. Ratio of compressive strength to tensile strength of concrete
increases with age-Answer
decreases with age
remains constant
none of the above
.
15. In limit state design of concrete for flexure, the area of stress block is taken as
0.36 Fck Xu-Answer
0.42 Fck Xu
0.446 Fck Xu
0.53 Fck Xu
.
16. The fitness modulus of the fine aggregate is in the range of
2.0 to 3.5-Answer
3.5 to 5.0
5.0 to 7.0
6.0 to 8.5
.
17. According to IS:456-1978, the maximum reinforcement in a column is
2%
4%
6%-Answer
8%
.
18. The minimum cover in a slab should neither be less than the diameter of bar nor less than
10 mm
15 mm-Answer
20 mm
13 mm
.
19. If the permissible stress in steel in tension is 140 N/mm^2, Permissible stress in concrete in bending compression is 5N / mm^2. Then the depth of neutral axis for a singly reinforced rectangular balanced section will be
0.35 d
0.40 d-Answer
0.45 d
dependent on grade of concrete also
.
20. The slab is designed as one way if the ratio of long span to short span is
less than 1
between 1 and 1.5
between 1.5 and 1.2
greater than 2-Answer
.
21. In any beam when the moment of inertia about the neutral axis is doubled, its deflection is
doubled
tripled
halved-Answer
minimum
.
22. The limits of percentage of the longitudinal reinforcement in a column is given by
0.15% to 2%
0.8% to 4%
0.8% to 6%-Answer
0.8% to 8%
.
23. A rigid prop provided for a beam
brings the bending for a beam
brings the deflection at the prop to zero-Answer
brings the slopes at the section to zero
brings the shear force at the section to zero
.
24. In a simply supported beam AB with a concentrated load W at a distance 'a' from support A and 'b' from support B, the deflection under the load is
wa^2 b^2 / 3EIL-Answer
wa^2 / 3EI
wa^2 b^2 /3EI
wa^2 b + 2/EIL
.
25. For the design of retaining walls the minimum factor of safety against over-turning is taken as
1.5
2.0-Answer
2.5
3.0
.
26. A cantilever beam is loaded by a point load at the free end. It is likely to fail by B.M.
under the load
at mid span
at support-Answer
none
.
27. The distance between centre lines of a broad gauge is 1.686m. The most economic length of sleeper for efficient distribution of B.M. is
1.866 m
2.866 m-Answer
3.866 m
0.866 m
.
28. In a simply supported beam of span L carrying an eccentric couple M acting at a distance A from the left support, the reaction included at the support is
M/L-Answer
L/M
ML
1/ML
.
29. Area of shear force diagram between two sections is
70 KNm
140 KNm-Answer
280 KNm
can not be found
.
30. The section modulus of square section of side A is
a^2 /6
a^3 /6-Answer
a^4 /12
a^3 /12
.
31. The minimum percentage of mild steel reinforcement in walls of RCC water tanks of 450 mm thick is about
0.20-Answer
0.30
0.24
0.16
.
31. A beam of span L m is simply supported at the ends. It is loaded by two equal clockwise moments at the supports. Point of contra flexure acts at
0.25 m from left support
0.25 m from right support
At mid span-Answer
none of these
.
32. The ratio of flexibility of loose beams (b x d) places one over the other to the flexibility of one integral beam (nb x d) is
h^2
1/h^2
1-Answer
h^3
.
33. The earth pressure at a depth d is P the earth pressure at depth d/2 is
P
4P
0.5P
0.25P-Answer
.
34. A reinforced concrete column is considered as a short column, if its slenderness ratio L/bn is less than
20
18
15
12-Answer
.
35. A common footing provided for two columns is called a
mat foundation
raft foundation
combined footing-Answer
common foundation
.
36. For reinforced concrete (M15) members immersed in sea water the cover shall be
Same as in the usual case
25 mm more than the cover in the usual cases
40 mm more than the cover in the usual cases
50 mm more than the cover in the usual cases-Answer
.
37. The modulus of elasticity of steel is
150 KN/mm^2
200 KN/mm^2-Answer
250 KN/mm^2
275 KN/mm^2
.
38. The number of rivets for connecting a strut to a gusset plate shall not be less than
2-Answer
3
4
5
.
39. The inclination of a lacing bar with the axis of the compression member shall not exceed
60
70-Answer
45
30
.
40. For unstiffened webs of girders, the thickness of web shall not be less than
D1/50
D1/85-Answer
D1/100
D1/150
.
41. Spacing of vertical stiffeners in a girder shall not be less than
0.50d
0.40d
0.33d-Answer
0.25d
.
42. The maximum bending moment for a purling may be taken as
WL/10-Answer
WL/8
WL/12
WL/15
.
43. If the foundations of all the columns of a structure are designed on the total live and dead load basis, then
there will be no settlement of columns
there will be no differential settlements
the settlement of exterior columns will be more than interior columns-Answer
the settlement of interior columns will be more than exterior columns
.
44. To minimize the effect of differential settlement, the area of footing should be designed for
dead load only
dead load + live load
dead load + fraction of live load-Answer
live load + fraction of dead load
.
45. A reduction factor Cr, load carrying capacity of a long columns is given by
Cr = 1.25 - Le/24b-Answer
Cr = 1 - Le/48b
Cr = 1.25 - Le/48b
Cr = 1.5 - Le/48b
.
46. Normally pre-stressing wires are arranged in the
upper part of the beam
lower part of the beam
centre
anywhere
.
47. The shear stress intensity changes from the centre to the surface of the shaft with
uniform rate
varying rate-Answer
remains same
all the above
.
48. The formula T/J = NO/L = fs/r when applied to torsion of closely coiled helical spring, the value of J will be calculated with
mean diameter of the coil D
the diameter of wire of spring-Answer
mean of D and d
(2D + d)3
.
49. The shear stress intensity is minimum at
axis of shaft-Answer
surface of the shaft
any inside layer of shaft
all the above
.
50. A steel member which is subjected to primary tension is called
Tie-Answer
Tie or beam
Strut
Sling
.
51. Sliding failure occurs in a solid gravity dam when
Resultant of all forces cuts the base of the dam outside
Resultant of all force cuts the base of the inner middle third point
Ratio of overturning moments exceeds one
Shear friction factor is less than 1.5-Answer
.
52. Mean velocity of flow in a river can be directly measured by means of
Boats
Dams
Surface floats
Rod floats-Answer
.
53. The formula used to calculate maximum flood discharge for deccan catchments is
Dicken's formula
Ryve's formula
Ali Nawab Jung Bahadur formula-Answer
Ingli's formula
.
54. Direct run off is the sum of
Surface run off and mass flow-Answer
Base flow and ground water run off
Deployed sub surface run off and deep percolation
Surface run off and interflow
.
55. A fluid is a substance that
always expands until it fills any container
is parctically incompressible
cannot remain at rest under the action of a shear force-Answer
cannot be subjected to shear forces
.
56. In Sutro weir the discharge is proportional to
H-Answer
H^1/2
H^3/2
H^5/2
.
57. Which of the following has highest coefficient of discharge
Sharp edged orifice
Venturimeter-Answer
Borda's mouth piece running free
Cippoletti weir
.
58. ML^-1 T-2 is the dimension of
Force
Pressure-Answer
Energy
Power
.
59. Cavitation is caused by
high velocity
low barometric pressure
low pressure-Answer
high pressure
.
60. Number of rivets required in a joint is
load/shear strength of a rivet
load/bearing strength of a rivet
load/tearing strength of a rivet
load/rivet value-Answer
.
61. The point of contraflexure occurs in
cantilever beams only
continuous beams only
over hanging beams only-Answer
all types of beams
.
62. According to Unwin's formula, if t is thickness of the plate in mm, the nominal diameter of the rivet is
d = 1.91 t
d = 1.91 t^2
d = 1.91 St-Answer
d = 1.91 St^3
.
63. The slenderness ratio of a column is zero when its length
is zero
is equal to its radius of gyration
is supported on all sides throughout its length
is between the points of zero moments-Answer
.
64 According to IS; 800-lacing bars resists transverse shear equal to
1.0% of the axial load
2.0% of the axial load
2.5% of the axial load-Answer
3.0% of the axial load
.
65. When the length of tension member is too long
a wire is used
a rod is used
a bar is used-Answer
a single angle is used
.
66. A major beam on a building structure, is known as
a girder
a floor beam
a main beam
all the above-Answer
.
67 For simply supported beams, the maximum permitted deflection is
1/325 of the span-Answer
1/350 of the span
1/375 of the span
1/400 of the span
.
68. In case of cantilever beams the ratio of span to the depth should not exceed
4
8
12-Answer
16
.
69. In a fillet weld placed on the sides of the base, the metal experiences
shear
tension
compression
all the above-Answer
.
70. Steel is efficiently used in
under reinforced section-Answer
over reinforced section
under and over reinforced section
none of the above
.
71. The maximum area of tension reinforcement in a beam is
4% of bD-Answer
4.5% of bD
5% of bD
5.5% of bD
.
72. The large moment of resistance of T-beam section is due to
width of rib
amount of steel
composite action between the flanges and the rib-Answer
depth of rib
.
73. If in any given pane, one end of a column is unrestrained, its unsupported length l, shall not exceed
100 b^2 /D-Answer
120 b^2 /D
125 b^2 /D
140 b^2 /D
.
74. The diameter of lateral ties in a column shall not be less than
6 mm
5 mm-Answer
8 mm
10 mm
.
75 The bending moment at a section of a beam is given by wx^3/6 then the expression for the rate of loading is
wx^4 /24
wx^2 /2-Answer
wx
w
.
76. The torque produced in a circular shaft rotating at 100 r.p.m. to produce 1 h.p. is _____ Kgcm
716.2-Answer
816.2
916.2
616.2
.
77. The weight of foundation may be assumed to be
15% of the column loads
20% of the column loads
25% of the column loads
10% of the column loads-Answer
.
78 In a continuous footing the area of longitudinal reinforcement required in the direction of wall is
0.3%-Answer
0.2%
0.5%
0.4%
.
79. The net upward pressure on footing p is given by
W + W1/W.q.
W.q./W + W1-Answer
W - W1/W.q.
W.q./W - W1
.
80. Partial safety factor m for steel in limit state design is
0.5
1.0
1.5
1.15-Answer
.
81. The design strength of materials Fs is given by
1.1 f/Rm
f/Rm-Answer
f
0.9f
.
82. The pre-stressed concrete induces artificially _____ stress in a structure before it is loaded
compressive
tensile
shear
bending-Answer
.
83. According to IS code the total amount of shrinkage for a post tensioned member is taken as
2 x 10^4 / log10 (T+2)
3 x 10^-4 / log10 (T+3)
3 x 10^-3 / log10 (T+3)
2 x 10^-3 / log10 (T+3)-Answer
.
84 The state at which tendon force is released permanently on the concrete is called
Transfer
Anchoring
Pre-tensioning-Answer
Post-tensioning
.
85. In a thin cylindrical shell if F1 is the hoop stress and F2 is the longitudinal stress induced, maximum shear stress at any point of the material is given by
F1 + F2 / 2-Answer
F1 - F2 / 2
F1F2 / 2
2F1 / F2
.
86. A beam is fixed at one end and is supported at the other end to the level of the fixed end by means of a rigid prop. At the propped end, for any applied load
only flexural moment is zero-Answer
the flexural moment as well as deflection is zero
the slope as well as the deflection is zero
the slope as well as the flexural moment is zero
.
87. The thickness of lacing bar used in steel ties should not be less than
6 mm
4.5 mm-Answer
B/40
L/40
.
88. Mohr's theorem I gives _____ between two tangents on the elastic line of beams
Slope
Deflection
S.F.
B.M.-Answer
.
89. IS code of practice for steel is
456
800-Answer
546
none
.
90. Select cash/commercial crop from the following
Maize
Paddy
Cotton-Answer
Wheat
.
100. Canal lining
Increases water logging area
Decreases water logging area-Answer
Does not affect water logging area
Maintains constant water logging area
.
101. The diameter of transverse reinforcement of columns should be equal to 1/4 of the diameter of the main steel rods but not less than
4 mm
5 mm
6 mm
7 mm-Answer
.
