The rigid portal frame shown in the given figure will not have any sidesway ifI1 = the moment of inertia of the column cross-section I2 = the moment of inertia of the beam cross-section

it is subjected to vertical loading only

the loading is symmetrical about its centre line

The role of superplasticizer in a cement paste is to

disperse the particles and to remove air bubbles

disperse the particles, remove air bubbles and to retard setting

To make certain that the backfill material is more pervious than the soil to be drained, the relationship used in

(D15)Filter ‚â§ 5 (D85)Protected soil

(D15)Filter ‚â• 5 (D85)Protected soil

(D15)Filter ‚â• 5 (D15)Protected soil

(D15)Filter ‚â§ 5 (D15)Protected soil

The wall friction of the retaining wall:

decreases passive earth pressure but increases active earth pressure

decreases active earth pressure but increases passive earth pressure

decreases passive earth pressure but increases active earth pressure

decreases both active and passive earth pressures

increases both active and passive earth pressures

When is a masonry wall known as a shear wall ?

If the earthquake load is out-of-plane

If the earthquake load is in-plane

If it is placed as infill to the frame

In a gusseted base, when the end of the column is machined smooth for complete bearing, the axial load is transferred to base slab :

50 % by direct bearing and 50% through fastening

60 % by direct bearing and 40% through fastening

Which one of the following is tne correct statement? In beam to column connections in steel construction, if torsion is permitted at the ends of simply supported beams by not providing the cleats, the

effective length remains same as the actual length

effective length'of the beam increases by 20 %

effective length remains same as the actual length

Permissible bending stresses are increased by around 10 %

joint has to be designed for torsion

A symmetrical channel section is made of a material which is equally strong in tension and compression. It is used as a simply supported beam with its web horizontal to carry vertical loads. It will

be strongest if the web is used as bottom face

be strongest if the web is used as top face

be strongest if the web is used as bottom face

be equally strong in (a) and (b) above

not be possible to state which of the above statements is correct

The resultant of the coplanar, concurrent system of forces F1, F2, F3 and F4 shown in the above figure is

20 kN acting vertically downwards

20 kN acting horizontally from left to right

What is the predominating coagulation mechanism for raw water having high turbidity and high alkalinity?

Adsorption and charge neutralization

For the continuous beam (EI constant) loaded as shown in the figure given, the moment at 'B' is

same as the free moment at mid-span of AB

0.75 times free moment at mid-span of AB

same as the free moment at mid-span of AB

1.50 times free moment at mid-span of AB

2.00 time free moment at mid-span of AB

What is the probable maximum precipitation (PMP) ?

Projected precipitation for a 100-yr return period

Maximum precipitation for all past recorded storms

Upper limit of rainfall, which is justified climatologically

1888 + Mcqs in Upsc Civil Service Exam Questions in Civil Engineering Page 33 McqOptions

1601.	The rigid portal frame shown in the given figure will not have any sidesway ifI1 = the moment of inertia of the column cross-section I2 = the moment of inertia of the beam cross-section
A.	it is subjected to vertical loading only
B.	I2 = 2I1
C.	the loading is symmetrical about its centre line
D.	loaded in any manner.
Answer» D. loaded in any manner.

Discussion

1602.	What does super-saturation of water body with DO cause ?
A.	Eutrophication
B.	Gas bubble disease in fish
C.	Methamoglobinemia
D.	Endemic goitre
Answer» B. Gas bubble disease in fish

Discussion

1603.	If a composite bar of steel and copper is heated, then the copper bar will be subjected to
A.	compression
B.	shear
C.	tension
D.	torsion
Answer» B. shear

Discussion

1604.	In a tilted aerial photograph, if the swing is 230¬∞, then the rotation angle is equal to
A.	140¬∞
B.	130¬∞
C.	50¬∞
D.	25¬∞
Answer» C. 50¬∞

Discussion

1605.	The role of superplasticizer in a cement paste is to
A.	disperse the particles
B.	disperse the particles and to remove air bubbles
C.	disperse the particles, remove air bubbles and to retard setting
D.	retard setting
Answer» E.

Discussion

1606.	If the stress on the cross-section of a circular short column of diameter D is to be wholly compressive, the load should be applied within a concentric circle of diameter
A.	D/2
B.	D/8
C.	D/4
D.	D/6
Answer» D. D/6

Discussion

1607.	A square framework formed of uniform heavy rods of equal weight joined together is hung by one corner. A weight W is suspended from each of the three lower corners and the shape of the square is preserved .with the help of a light rod along the horizontal diagonal. The thrust of the light rod is
A.	2 W
B.	3 W
C.	4 W
D.	6 W
Answer» D. 6 W

Discussion

1608.	To make certain that the backfill material is more pervious than the soil to be drained, the relationship used in
A.	(D15)Filter ‚â§ 5 (D85)Protected soil
B.	(D15)Filter ‚â• 5 (D85)Protected soil
C.	(D15)Filter ‚â• 5 (D15)Protected soil
D.	(D15)Filter ‚â§ 5 (D15)Protected soil
Answer» E.

Discussion

1609.	The shear force diagram of a beam is shown in the given figure. The absolute maximum bending moment in the beam is
A.	(2P x a)
B.	(5P x a)
C.	(4P x a)
D.	(7P x a)
Answer» C. (4P x a)

Discussion

1610.	A circular sewer of diameter 1 m carries storm water to a depth of 0.75 m. The hydraulic radius is approximately
A.	0.3 m
B.	0.4 m
C.	0.5 m
D.	0.6 m
Answer» B. 0.4 m

Discussion

1611.	A line of true length 500 m when measured by a 20 m tape is reported to be 502 m long. The correct length of the tape is
A.	19.92 m
B.	20.08 m
C.	20.80 m
D.	21 m
Answer» C. 20.80 m

Discussion

1612.	The wall friction of the retaining wall:
A.	decreases active earth pressure but increases passive earth pressure
B.	decreases passive earth pressure but increases active earth pressure
C.	decreases both active and passive earth pressures
D.	increases both active and passive earth pressures
Answer» B. decreases passive earth pressure but increases active earth pressure

Discussion

1613.	A sewer is laid from a manhole A to a manhole B, 250 m apart along a downward gradient of 1 in 250. If the reduced level of the invert at A is 205.75 m and the height of the boring rod is 3 m, then, reduced level of the sight rail at B, is
A.	202.75 m
B.	206.75 m
C.	208.75 m
D.	211.75 m
Answer» C. 208.75 m

Discussion

1614.	The side AD of the square block ABCD as shown in the given figure is fixed at the base and it is under a state of simple shear causing shear stress œÑ and shear strain œÄ, where The distorted shape is AB'C'D. The diagonal strain (linear) will be
A.
B.
Answer» B.

Discussion

1615.	For one cubic metre of brick masonry, the number of modular bricks needed is
A.	400 or less
B.	400 to 450
C.	500 to 550
D.	600 to 650
Answer» D. 600 to 650

Discussion

1616.	Consider the following statements related to Los Angeles Abrasion test on aggregates :1. It evaluates hardness of source - rock2. It has a coefficient of variation of about 30 percentWhich of the statements given above is/are correct ?
A.	1 only
B.	2 only
C.	Both 1 and 2
D.	Neither 1 nor 2
Answer» B. 2 only

Discussion

1617.	When is a masonry wall known as a shear wall ?
A.	If the earthquake load is out-of-plane
B.	If the earthquake load is in-plane
C.	If it is under reinforced
D.	If it is placed as infill to the frame
Answer» C. If it is under reinforced

Discussion

1618.	The effective length of a fillet weld of length 'L' and size 's' is given by
A.	L - s
B.	L - 2s
C.
Answer» C.

Discussion

1619.	Drop panel is a structural component in :
A.	grid floor
B.	flat plate
C.	flat slab
D.	slab-beam system of floor
Answer» D. slab-beam system of floor

Discussion

1620.	In a gusseted base, when the end of the column is machined smooth for complete bearing, the axial load is transferred to base slab :
A.	Fully through fastening
B.	Fully by direct bearing
C.	50 % by direct bearing and 50% through fastening
D.	60 % by direct bearing and 40% through fastening
Answer» C. 50 % by direct bearing and 50% through fastening

Discussion

1621.	Consider the following systems :1. Trusses and purlins2. Suspension system3. Flat grid roof 4. ShellsWhen these are used in single deck industrial structures, the correct sequence in increasing order of spans will be
A.	3, 1, 2, 4
B.	1, 3, 2, 4
C.	3, 1, 4, 2
D.	2, 4, 1, 3
Answer» B. 1, 3, 2, 4

Discussion

1622.	A jet of water issues from a 5 cm diameter nozzle, held vertically upwards, at a velocity of 20 m/sec. If air resistance consumers 10% of the initial energy of the jet, then it would reach a height, above the nozzle, of
A.	18.35 m
B.	19.14 m
C.	19.92 m
D.	20.00 m
Answer» B. 19.14 m

Discussion

1623.	At the same mean velocity, what is the ratio of head loss per unit length for a sewer pipe flowing full to that for the same pipe flowing half full ?
A.	2
B.	1.7
C.	1
D.	0.6
Answer» B. 1.7

Discussion

1624.	The stress distribution at a depth beneath a loaded area is determined using Newmark's influence chart which indicates an influence value of 0.005. The number of segments covered by the loaded area in the chart is 20 and the intensity of loading on the area is 10 T/m2. The intensity of stress distribution at that depth is
A.	1 T/m2
B.	2 T/m2
C.	5 T/m2
D.	10 T/m2
Answer» E.

Discussion

1625.	Which one of the following is tne correct statement? In beam to column connections in steel construction, if torsion is permitted at the ends of simply supported beams by not providing the cleats, the
A.	effective length'of the beam increases by 20 %
B.	effective length remains same as the actual length
C.	Permissible bending stresses are increased by around 10 %
D.	joint has to be designed for torsion
Answer» B. effective length remains same as the actual length

Discussion

1626.	A symmetrical channel section is made of a material which is equally strong in tension and compression. It is used as a simply supported beam with its web horizontal to carry vertical loads. It will
A.	be strongest if the web is used as top face
B.	be strongest if the web is used as bottom face
C.	be equally strong in (a) and (b) above
D.	not be possible to state which of the above statements is correct
Answer» B. be strongest if the web is used as bottom face

Discussion

1627.	A shaft turns at 150 rpm under a torque of 1500 Nm. Power transmitted is
A.	15 œÄ kW
B.	l0 œÄ kW
C.	7.5 œÄ kW
D.	5 œÄ kW
Answer» D. 5 œÄ kW

Discussion

1628.	The following quantities refer to a channel section used as a beam : b = width of flange (upto centre of web thickness).h = depth of web (c/c of flange thickness). t = thickness of flange and web.I = moment of inertia of channel about xx axis.e = distance of shear centre, outside the channel from the mid thickness of the web.The value of 'e' is given by
A.	tb2/4Ih2
B.	th2b2/4I
C.	h2I/4tb2
D.	h2b2/4tI
Answer» C. h2I/4tb2

Discussion

1629.	On which one of the following factors, does strength of concrete depend primarily ?
A.	Quality of coarse aggregate
B.	Quality of fine aggregate
C.	Fineness of cement
D.	Water-cement ratio
Answer» E.

Discussion

1630.	The magnitude of acceleration is given by the
A.	slope of distance-time curve
B.	length of velocity-time curve
C.	slope of velocity-time curve
D.	length of distance-time curve
Answer» B. length of velocity-time curve

Discussion

1631.	An imaginary line passing through the optical centre of the objective and the optical centre of the eye-piece in the telescope of a surveying instrument is called the
A.	horizontal axis
B.	line of collimation
C.	optical axis of the telescope
D.	reference axis
Answer» C. optical axis of the telescope

Discussion

1632.	The following steps are involved in making a spigot and socket joint of cast iron pipes used in water supply systems :1. Tarred gasket or hemp yarn in wrapped around the spigot.2. The sipgot end is centered into the socket end of the preceding pipe.3. A joining ring end is placed around the barrel and against the face of the socket.4. The gasket or hemp yarn in caulked slightly.5. Molten pig lead is poured and then caulked.The correct sequence of these steps is
A.	2, 1, 4, 3, 5
B.	2, 1, 3, 4, 5
C.	1, 2, 4, 5, 3
D.	1, 2, 3, 5, 4
Answer» D. 1, 2, 3, 5, 4

Discussion

1633.	Consider the following limitations :1. Can be performed only on purely cohesionless soils2. Plane of failure is predetermined3. There is virtually no control on drainage4. Non-uniform distribution of stresses5. Principal stresses in the sample cannot be determined The limitations inherent in direct shear test include
A.	1, 2 and 3
B.	2, 3 and 4
C.	3, 4 and 5
D.	1, 2 and 5
Answer» E.

Discussion

1634.	The resultant of the coplanar, concurrent system of forces F1, F2, F3 and F4 shown in the above figure is
A.	20kN acting vertically upwards
B.	zero
C.	20 kN acting vertically downwards
D.	20 kN acting horizontally from left to right
Answer» C. 20 kN acting vertically downwards

Discussion

1635.	What is the predominating coagulation mechanism for raw water having high turbidity and high alkalinity?
A.	Ionic layer compression
B.	Adsorption and charge neutralization
C.	Sweep coagulation
D.	Inter particle bridging
Answer» C. Sweep coagulation

Discussion

1636.	The optimistic, most likely and pessimistic time estimates of an activity are 5, 10 and 21 days respectively. What are the expected time and standard deviation respectively ?
A.	12, 3
B.	11, 4
C.	11, 2.67
D.	10, 16
Answer» D. 10, 16

Discussion

1637.	The figure refers to a channel section of uniform thickness of 1 cm used as a beam with the cross-sectional dimensions shown in cm units. If the Moment of Inertia of channel Ixx be equal to 246 cm4 and C be the shear centre, then the value of e in cm is equal to
A.	1.5
B.	2.5
C.	2.25
D.	1.67
Answer» B. 2.5

Discussion

1638.	In a laminar boundary layer, the velocity distribution can be assumed to be given, in usual notations, asWhich one of the following is the correct expression for the displacement thickness Œ¥* for this boundary layer ?
A.	Œ¥* = Œ¥
B.	Œ¥* = Œ¥/2
C.	Œ¥* = Œ¥/4
D.	Œ¥* = Œ¥/6
Answer» C. Œ¥* = Œ¥/4

Discussion

1639.	Purlins are provided, in industrial buildings, over roof trusses to carry dead loads, live loads and wind loads. As per IS code, what are they assumed to be ?
A.	Simply supported
B.	Cantilever
C.	Continuous
D.	Fixed
Answer» D. Fixed

Discussion

1640.	In a rectangular channel, the depths of flow before and after the hydraulic jump are respectively 0.2 m and 1.2 m. What is the energy loss in the jump ?
A.	1.042 m
B.	2.084 m
C.	3.126 m
D.	4.168 m
Answer» B. 2.084 m

Discussion

1641.	For the continuous beam (EI constant) loaded as shown in the figure given, the moment at 'B' is
A.	0.75 times free moment at mid-span of AB
B.	same as the free moment at mid-span of AB
C.	1.50 times free moment at mid-span of AB
D.	2.00 time free moment at mid-span of AB
Answer» B. same as the free moment at mid-span of AB

Discussion

1642.	Consider the following oxides : 1. Al2O32. CaO3. SiO2The correct sequence in increasing order of their percentage in an ordinary portland cement is
A.	2, 1, 3
B.	1, 3, 2
C.	3, 1, 2
D.	1, 2, 3
Answer» C. 3, 1, 2

Discussion

1643.	Consider the following types of soil tests :1. California bearing ratio2. Consolidation3. Unconfined compressionThe soil tests required to be done in the case of undisturbed samples include
A.	1, 2 and 3
B.	1 and 2
C.	1 and 3
D.	2 and 3
Answer» D. 2 and 3

Discussion

1644.	A vertical photograph of a chimney was taken from an elevation of 500 m above M.S.L, The elevation of the base of the chimney was 250 m. If the relief displacement of the chimney was 51.4 mm and the radial distance of the image of the top of the chimney was 110 mm, the height of the chimney is
A.	233.64 m
B.	133.2 m
C.	116.82 m
D.	58.41m
Answer» D. 58.41m

Discussion

1645.	Consider the following statements :Bearing stiffness, in plate girders, are :1. provided at supports.2. provided under concentrated loads.3. provided alternately on the web.Which of the statements given above is/are correct ?
A.	1 only
B.	2 only
C.	1 and 2
D.	1, 2 and 3
Answer» D. 1, 2 and 3

Discussion

1646.	The slenderness ratio of lacing bars should not exceed :
A.	100
B.	200
C.	145
D.	180
Answer» D. 180

Discussion

1647.	What is the probable maximum precipitation (PMP) ?
A.	Projected precipitation for a 100-yr return period
B.	Maximum precipitation for all past recorded storms
C.	Upper limit of rainfall, which is justified climatologically
D.	Effective precipitable water
Answer» D. Effective precipitable water

Discussion

1648.	What is the moment (approximate) of the force acting on a railway sign post shown in the figure about the point ?
A.	1135 Nm
B.	1205 Nm
C.	980 Nm
D.	1300 Nm
Answer» B. 1205 Nm

Discussion

1649.	For three-dimensional movement of a weight, which one of the following is most suitable ?
A.	Chain hoist
B.	Winch
C.	Crane
D.	Jack
Answer» D. Jack

Discussion

1650.	A round steel bar of overall length 40 cm consists of two equal portions of 29 cm each having diameters of 10 cm and 8 cm respectively. If the rod is subjected to a tensile load of 10 tones, the elongation will be given by :(E = 2 x 106 kg/cm2)
A.	1/10œÄ (1/25 + 1/16) cm
B.	2/10œÄ (1/25 + 1/16) cm
C.	3/10 œÄ (1/25 + 1/16) cm
D.	4/10 œÄ (1/25 + 1/16) cm
Answer» B. 2/10œÄ (1/25 + 1/16) cm

Discussion

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