Exam Details

Subject
Paper paper 1
Exam / Course mains
Department
Organization maharashtra public service commission
Position
Exam Date 2012
City, State maharashtra,


Question Paper

1 In Residential building, kitchen should have aspect.

Eastern

Southern

South-Eastern

Northern

2 Workability of concrete can be measured by

Slump test

Compaction factor test

Kelly ball test

All the above

3 For a rectangular room, better proportion is to adopt length as times of breadth.

1 to 1·2

1·2 to 1·7

1·2 to 1·5

1·5 to 1·7

4 The laboratory slump test result of the fresh concrete is between 25 -50 mm. The degree of workability of such concrete is

very low

low

medium

high

5 Black cotton soil is a product of decomposition of

Granite

Marble

Basalt

Sandstone

6 The strength achieved by a brick depends on

composition of brick earth

nature of moulding adopted

burning and cooling process

All the above

7 Capacity of concrete to bear imposed stresses safely is called as

Compressive strength

Shear strength

Durability

Resistance

8 State whether the following statements are true or false:
a. Consistency test is used to determine the percentage of water required for preparing cement paste.
b. Vicat Apparatus is used for determining the consistency of cement.

a true, b true

a false, b false

a true, b false

a false, b true

9 Durability of construction material is

Resistance to crushing

Resistance to weathering

Shear strength

Compressive strength

10 Seasoning of timber means

removing the moisture content

reducing weight of timber

Both and

None of the above

11 the quantity of fine aggregate required per 50 kg of cement of M 150 2 4 grade of concrete_

0.340 kg

0.053 kg

0.035 kg

0.070 kg

12 Artificial method of seasoning timber is

boiling

chemical seasoning

water seasoning

All of the above

13 Laterite is used in

carving and ornamental works

fire resistance works

electrical switchboards

heavy engineering works

14 In medium carbon steel, carbon content varies from

0.25% to 0·60%

0.10% to 0.25%

0.60% to 0·75%

0.75% to 1.00%

15 Light weight concrete is also known as

low concrete

lean concrete

transparent concrete

cellular concrete

16 The process of tempering is applied to steel in hardening process for improving

ductility

strength

roughness

All of the above

17 A cantilever beam of uniform cross-section carries a uniformly distributed load over the portion of length as shown. Slope at free end will be

<img src='./qimages/-17.jpg'>

18 Shrinkage strain developed in post-tensioning beam when prestressing force transfer at the age of days is

0·003



loglO(t +1)loglO(t

0·001.

19 The at any section in a given beam is equal to corresponding section in conjugate beam.

slope, shear force •

deflection, shear force

slope, bending moment

slope, deflectioll

20 A beam of span carries a U.D.L. of per m run and prestressing force in the cable is What will be the eccentricity of parabolic cable at centre (i.e. dip) so as to nullify the bending effect 3 2

3I.2

3wL



wL 8P 3P 5P

11 A cast iron beam is a T-section as shown. It is supported and carrying a UDiformly distributed load. Which of the following is the correct bending stress distribution diagram if the element is stressed perfectly within plastic limit? .









22 In pretensioned when prestressed force is transferred by releasing tendon, the end of wire swells and develops wedge effect. At the end, prestressing force becomes zero. This is known as Hoyer effect Shear effect Wobbling effect Bursting effect SPACE FOR ROUGH WORK P.T.O. U01 6 A

23 Which part of the beam is subjected to pure bending in the following figure 20kN 30kN D Ar=2m

AB

BC

CD

No part of beam is subjected to pure bending •

24 Progressive increase in the inelastic deformation of concrete under sustained stress component is known as

Shrinkage of concrete

Creep of concrete •

Deformation of concrete

Yielding of concrete

25 Calculate the maximum stress acting on the cross-section of following element: . 200 . Pa:1 Cross-section .Take PI" 45 kN, P2 445 kN and P4 " 130 kN.

20 N/mm2

22·5 N/mm2

28·75 N/mm2

6·5 N/mm2

26 What are the stresses developed at the top and bottom of a rectangular beam subjected to prestressing force of 50 kN at a distance of 50 mm from bottom. The ds of beam is 100x100mm. . 10)

27 At room temperature the rods are shown in figure. When temperature is raised, what 1-0·3 m 1·25 Aluminium Steel dis 20 mm dia 10 rom

Compressive in aluminium and steel

Tensile in aluminium and steel

Compressive in aluminium and tensile in steel

'l'ensile in aluminium and 'compressive in steel SPACE FOR ROUGH WORK

28 The prestressed concrete is considered as a combination of steel and concrete, with steel taking tensile force passing through the tendon and concrete taking compressive force passing through the C.G. of stress distribution so that the two materials form a resisting couple to resist external moment. This concept is called as

strength concept

stress concept

load balancing concept

moment concept

29 If AC is principal plane, then magnitude of principal tensile stresses will be =15 MPa 40MPa A

15 MPa

5 MPa

45 MPa

Zero

30 In a post-tensioning system, high tension steel wires 5 mm to 8 mm diameter about 12 in number are arranged to form a group into a cable with a spring inside. This system is known as

The Freyssinet System

The Magnel Blaton System

P.S.C. Monowire System

C.C.L. Standard System SPACE FOR ROUGH WORK p.T.a.

31 A simply supported beam subjected to uniformly varying load of intensity W at left end reduces to zero at right end Then slope at end B is 5WL3 9WL3 3WL3 7WL3 360 EI 360 EI 360 EI 360 EI

32 If a moment is applied to the hinged end of a prismatic propped cantilever, then the moment at the fixed end will be

M

M/2

M/3



33 A single concentrated load W rolling over the beam of span L will cause the maximum bending moment and shear force on a section X at a distance x from left support. When the load is on the section, its maximum bending moment will be



wx

wx2(L

WL(L

34 Maximum number of unknown forces that can be detennined in concurrent force system under equilibrium is

zero





6

35 A beam fixed at one end and simply supported at the other end is carrying uniformly distributed load of intensity throughout the span L. Then reaction at simply supported end is

5 3 8 3

-wL -wL -wL 2 wL 8 8 5 . 36. A two span continuous beam having equal spans each of length 1 is subjected to u.d.l. of w per unit run over the whole beam.· The beam has constant EI. The bending moment at the middle support is wl2/4

wt2/8

wl2/12

wl2/16

37 A beam fixed at one end and free at the other end is subjected to V.D.L. of intensity over the entire span Then the deflection at free end will be

wL4/8 EI EI wL2/8 EI wL4/3 EI • SPACE FOR·ROUGH WORK 38•. A two span continuous beam having equal spans each of length Z is subjected to u.d.1. w per unit length. The beam has constant EI. The reaction at the middle support is wZ

5 wZ/2

5 wZ/4

5 wZ/S

39 A cable is supported at both ends at the same level and is subjected to U.D.L. over the entire span. Ifyc is the central dip and is the span of a cable, then horizontal thruat developed at the support is .

wZ3/Syc

wZ2/3yc

wZ2/Syc

wZ2/2yc

40 VIand V2 are the strain energies stored in a prismatic bar due to axial tensile forces PI and P2 respectively. The strain energy V stored in the same bar due to combined action of PI and P2 will be

V=VI+V2

V=VI xU 2

V<VI

V>VI +V2 2

41 "The bending moment at any point of an arch axis is proportional to the vertical intercept between the theoretical arch" is the statement of

Mohr's theorem

Eddy's theorem

Castigliano's theorem

Theorem ofleast work

42 A" three-hinged symmetrical parabolic arch is subjected to a u.d.l. of w per unit run over the whole span. Then the bending moment is zero at

supports

quarter spans

crown

All the three above

43 When one of the supports of a beam is at a lower level as compared to the other, it will cause a moment at both ends. The magnitude of this moment introduced in .slope deflection equation is 3Elll 4Elll El II 2Elll Z2 l2

44 A two-hinged parabolic arch is subjected to u.d.l. w over entire span. Then the horizontal thrust is wl2/3h wZ2/4h wZ2/6h wZ2/Sh SPACE FOR ROUGH WORK P.T.O. U01 10 A

45 The distance between rivet centers measured along transverse to the direction of force is

Gauge

Pitch

End distance

Maximum pitch

46 Determine the rivet value of 20 mm diameter rivets connecting 12 mm thick plate if it is in single shear. Gross area of rivet is 363·05 mm2, permissible stresses in shear and bearing are 80 MPa and 250 MPa respectively.

64·5 kN

645 kN

29·044 kN

290·44 kN

47 The effective length of fillet weld of length 200 mm and size 12 mm is

188 mm

176 mm

388 mm

200 mm

48 The type of weld used for joining two surfaces approximately at right angles to each other is known as

Butt weld

U groove weld

V groove weld

Fillet weld

49 The net effective area of a single angle section connected by one leg to the gusset plate is

50 The effective length of compression steel column of length which is effectively held in position at both ends but not restrained against rotation is

0·65 L

0·8 L

L

1·5 L

51 The axial force in each lacing in double lacing system is V V·



4nsin a 2nsin a v 2V



nsina nsina SPACE FOR ROUGH WORK

62 The beam is subjected to U.D.L. of 41·25 !tN/m. Effective span of beam is 8 m. Find section modulus for the section. Assume 165 MPa.

2 x 106 rom3 2 x 103rom3 2·5 x 106 mm3 2·5)( 103 rom3 IS. What is the effective length of beam ifcompreasion flange ia restrained fully apiDst lateral bending, as per IS 800 200 L

0·8 L

0·85 L

0·7 L

54 As per IS 800 1984, the thickness of slab base is " 3w (a2 3w (a2 4 4

66 Intermediate vertical stiffners are required in plate girder when d1tratio of the web w exceeds

85

80

90

75

66 In plate girder, flanges are designed to reBist

Shear force

Bending moment

Axial force

Torsional moment

57 The flange splice in plate girder should be selected at

maximum shear location

minimum shear location

maximum moment location

minimum moment location

58 Structural members of the truss which are supported on the principal rafter and which run transverse to the truss are called Rafters Purlins Sag tie Struts SPACE FOR ROUGH WORK p.T.a. U01 12 A

59 The moment of resistance offered by balanced section in W.S.M. is given by (As per IS 456 -2000)

1 2

1 2"2 •acbe • b . x "2 . acbe • b . d

1"2 •acbe • b • d .

1"2 . acbe • b . x •

60 The compressive strength requirements of 53 grade a.p..c. cement as per IS 12269 -1989 7 and 28 days in N/mm2 are

33, 43, 53

27, 37, 53

33,47, 53

27, 45, 53

61 In a rectangular beam of section b x subjected to ultimate torsional moment Tu, equivalent ultimate shear can be given as

Vu 1·6. bTu

1.6. Tu bd Tu . Tu

Vu 2. b·

2b

62 Area of footing of an axially loaded column subjected to working load of 1000 kN and safe bearing capacity of soil 250 kN/m2, is

4·0 m2

4·4 m2

6·0 m2

5·5 m2

63 Minimum depth of foundation is calculated using Rankine's formula in which is the angle of repose, qo is the safe bearing capacity and y is the unit weight of soil. The value is qo sinlj>r qo 1 cos lj>r



y I-sinlj> y l+coslj> qo -sinlj>r qo coslj>r



y l+sinlj> y l-coslj> SPACE FOR ROUGH WORK

64 If a retaining wall is to be constructed to retain water of height and is unit weight of water, then water pressure acting on retaining wall will be K wH2/2 a wH2/2

60 As per IS 456 2000, maximum benrling moment at a support next to end support of a three span continuous beam having each span subjected to V.D.L. in the form of dead load and live load is given by

L2 W L2

W L2 L2 10 d 9L 9d 10 L





66 Area of torsional reinforcement provided in a two-way slab at comers where both adjacent edges are continuous is

3 A st





0

67 A singly reinforced rectangular section, b x d is effective cis, fel< and fy are the characteristic strengths of concrete and steel respectively. The depth of neutral axis is calculated as 0.87f A y st 0.36fck bd2

68 The maximum strain in steel at failure in limit state method of design is considered as f f

y 1-15 E. 0·002

y 1·15 E. 0·0035 1·5 f f y

0·0035

0·002 1·5E E. • • SPACE FOR ROUGH WORK P.T.O.

69 In case of simply supported beam subjected to U.D.L. w throughout the span which develops maximum B.M. at the mid-span, the cracks formed during the failure· of beam at mid-span are

horizontal

inclined at 45°

inclined at 60°

vertical

70 In a slab cast monolithically with cantilever beam, the beam is above the slab so as to give plain soffit. Then the beam is designed as

Rectangular section

Flanged section

Doubly reinforced section

None of the above

71 The load carrying capacity of a circular column with helical reinforcement is how much more than that of column with lateral ties

5%

10%

15%

20%

72 For the design of a staircase, if R is the riser, T is the tread and D is the thickness of waist slab, then the load of waist slab per m width of stair in plan will be 2

25Dx( T

25Dx(JT2 T+R JT2+R2 2



(JT2 25DX( R 25Dx R JT2.j. R2 SPACE FOR ROUGH WORK A 15 U01

73 There is a post-tensioned prestressed concrete beam with effective simply supported span of 8 m. This beam with rectangular cross section is prestressed with parabolic cable with 200 kN force, having eccentricity 200 mm above neutral axis at mid-span and 200 mm below it at support. The cable can be replaced by an equivalent effect as 10kN/m 40kN-m 40kN-m . 40 kN-m

74 Principal tensile stresses at any section and at any fiber in a prestressed concrete beam are influenced by

Horizontal prestress in concrete

Vertical prestress in concrete

Shear stress in concrete

All of the above

75 Effeciency of a rectangular prestressed concrete section with dimensions b =0·6 d is

bd

0·5 bd

0·5

0·333

76 Which of the following statements is/are true with reference to a load balancing cable? Statement I The flexural stresses are uniform at any section throughout the span at service stage. Statement II The flexural stresses are zero in the extreme fibers at any section throughout the span at service stage. Statement III The shear stresses are zero at any section throughout the span at service stage.

I only

I and III only

II and III only

None of these SPACE FOR ROUGH WORK P.T.O.

77 As per IS 1343 -1980, loss of prestress in steel due to shrinkage in concrete in a pre-tension beam is if E. 2 x 105 MPa.

60 MPa

200 MPa

20 MPa

0·02 f. MPa

78 The net resultant stresses at bottom fiber of a section are zero means the resultant thrust must be p.assing from

extreme top fiber

neutral axis

upper kern point

lower kern point

79 In a post-tensioned prestressed concrete beam, jacking force is applied from one end only. The loss of stresses in steel due to friction between steel and surrounding material will be maximum at

Jacking end

Mid span

Anchored end

Loss of streSses in steel due to friction is uniform throughout the span

80 Minimum strength of concrete at transfer to avoid cracking of extreme fiber at a prestressed concrete beam with reference to limit state of servicability, maximum compression in flexure should be

0·7 Jrck

0·5 fek

0·24 Jrck



81 Vertical limits within which cable is to be provided in a post-tensioned prestressed concrete element is called as

Anchorage zone

End block

Transmission length zone

Safe cable zone

82 Minimum grade of concrete to be used for pre-and post-tension prestressed concrete construction are

M30 and M40 respectively

M30 in both cases

M;40 in both cases

M40 and M30 respectively SPACE FOR ROUGH WORK

88 The resist bursting tension, designed reinforcement is distributed in the zone of theloadedfaceof theendblock,where2yois depthofequivalentprism.

OYo to 2yo

Oyo to Yo

O·2yo to 2yo

O·2yo to Yo

84 What is the correct order of increase in ultimate moment of resistance of I. Pre-tension section II. Post-tension bonded section III. Post-tension unbonded section, keeping all other parameters same.

I,II andIII

III,II andI.

II, III and I

All sections will have same UMR

85 Deflection of a simply supported prestressed concrete beam of span and flexural rigidity due to a straight cable carrying prestressing force and eccentriCity below the neutral axis is 5 Pel2 i 2 1 pel

48 EI I

8EI 2 i pel2 5 pel2

Pel 8EI I

8 EI 48EI I

88 A cantilever beam of span is supporting a udl of intensity Most suitable cable profile will be parabolic cable profile I=--Iparabolic cable profile I parabolic cable profile SPACE FOR ROUGH WORK p.1.0.

87 The shortcoming of bar chart is

lack of degree of details

activity inter-relationship

does not show progress of work

All the above

88 Among the following, who is considered as the father of scientific management? Max Weber Henry Fayol F.W. Taylor Elton Mayo

89 Program Evaluation and Review Technique is used when

repetitive type of work exists

time estimation is uncertain

time estimation is very easy

cost optimization is of prime importance

90 Which of the following is the main contribution of scientific management?

A rational approach to solve organisation problem

Development of principles of management

Correlation improved working conditions and high production

All of the above

91 The sequence to be followed while developing the network diagram is a. defining objectives b. sequencing the activities c. breaking down the structure d. developing the relation between events









92 In what way does ABC analysis help the manager

To purchase material at low price

To exercise selective control

To purchase material very fast

To 'select good quality material

93 The optimistic time, pessimistic time and most likely time required for completion of activity is 11 and 6 days respectively. The time is

5 days

6 days

5·5 days

6·5 days SPACE FOR ROUGH WORK

84 Which of the following is the formula for Economic Order Quantity if M is annual demand, C is ordering cost, C is inventory carrying cost and S is unit price of an oc . item? t MC

EOQ SCc0 EOQ EOQ=c C oc 91t. The optimistic time, pessimistic time and most likely time required for completion of an activity is 8 and 6 days respectively. The variance of time estimate is 0·4356

0·450

0·400

0·500

96 Which of the following Acts specially covers safety legislation of construction industry in India

Contract Labour Act

Workmen's Compensation Act

Inter State Migrant Workers Act

There is no safety legislation oriented to construction industry

97 Most of the accidents in construction industry happen due to

lack of education and training

negligence and ignorlDce

Both and

None of the above

98 CPM network is

Activity oriented

Event oriented

Labour oriented

Money oriented

99 The fire safety requirements of the building are designed as per

IS 1645 -1960

IS 1256 -1967

IS 1647 -1960

IS 1646 -1960

100 Optimum duration of project corresponds to which of the following

Direct project cost

Indirect project cost

Crash project cost

Total project cost


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