Online Civil Engineering Test - Previous GATE Exam Papers Test 4

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The cylinder strength of the concrete is less than the cube strength because of

the difference in the shape of the cross section of the specimens

the difference in the slendeness ratio of the specimens

the friction between the concrete specimens and the steel plate of the testing machine

the cubes are tested without capping but the cylinders are tested with capping

[#]

The permissible bending tensile stress in concrete for the vertical wall of an R.C. water tank made of M 25 concrete is :

8.5 N/mm²

6.0 N/mm³

2.5 N/mm²

1.8 N/mm²

[#]

Vane tester is normally used for determining in situ shear strength of :

soft clays

sand

stiff clays

gravel

[#]

The basic assumption of plane sections normal to the neutral axis before bending, remaining plane and normal to the neutral axis after bending, leads to :

uniform strain over the beam cross section

uniform stress over the cross section

linearly varying strain over the cross section

stresses which are proportional to strains at all cross sections

[#]

Negative skin friction occurs when :

an upward drag exists in the pile

the surrounding soil settles more than the pile

the pile passes continuously through a firm soil

the driving operation begins

[#]

Both Reynolds and Froude numbers assume significance in one of following examples :

Motion of submarine at large depths

Motion of ship in deep seas

Cruising of a missile in air

Flow over spillways

[#]

Two footings, one circular and the other square, are founded on the surface of a purely cohesionless soil. The diameter of the circular footing is same as that of the side of the square footing. The ratio of their ultimate bearing capcities is

3/4

4/3

1.0

1.3

[#]

Design rate of super elevation for horizontal highway curve of radius 450 m for a mixed traffic condition, having a speed of 125 km/hour is

1.0

0.05

0.07

0.154

[#]

If YY is the centroidal axis of a T beam-section subjected to plastic moment, Mp, the neutral axis lies,

above the line ZZ

between the lines YY and ZZ

between the lines XX and YY

below the line XX

[#]

10.

The main constituents of gas generated during the anaerobic digestion of sewage sludge are :

carbon dioxide and methane

methane and ethane

carbon dioxide and carbon monoxide

carbon monoxide and nitrogen

[#]

11.

If soil is dried beyond its shrinkage limit, it will show :

Large volume change

Moderate volume change

Low volume change

No volume change

[#]

12.

Two samples of water A and B have pH values of 4.4 and 6.4 respectively. How many times more acidic sample A is than sample B ?

100

200

[#]

13.

The Piezometric head at point C, in the experimental set-up shown in the below figure when the flow takes place under a constant head through the soils A and B is

0 cm

40 cm

80 cm

120 cm

[#]

14.

Delta (Δ) in cm. Duty (D) in hectare Cumec and Base period (B) in days are related as

Δ = 864 B/D

B = 864 D/Δ

B = 864 Δ/D

D = 8.64 B/Δ

[#]

15.

Rapid curing cut back bitumen is produced by blending bitumen with

Kerosene

Benzene

Diesel

Petrol

[#]

16.

A river 5 m deep consists of a sand bed with saturated unit weight of 20 kN/m³ . v_w = 9.81 kN/m³. The effective vertical stress at 5 m from the top of sand bed is

41 kN/m²

51 kN/m²

55 kN/m²

53 kN/m²

[#]

17.

A prestressed concrete rectangular beam of size 300 mm x 900 mm is prestressed with an initial prestressing force of 700 kN at an eccentricity of 350 mm at midspan. Stress at top of the beam due to prestress alone, in N/mm² is

46 (tension)

2.59 (compression)

zero

8.64 (compression)

[#]

18.

Base course is used in rigid pavements for

prevention of subgrade settlement

prevention of slab cracking

prevention of pumping

prevention of thermal expansion

[#]

19.

The ultimate bearing capacity of a soil is 300 kN/m². The depth of foundation is 1 m and unit weight of soil is 20 kN/m³. Choosing a factor of safety of 2.5, the net safe bearing cacpacity is

100 kN/m²

112 kN/m²

800 kN/m²

100.5 kN/m²

[#]

20.

The type of surveying in which the curvature of the earth is taken into account is called

Geodetic surveying

Plane surveying

Preliminary surveying

Topographical surveying

[#]

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