BARC OCES 2022 Quiz 22

The main constituent of cement which is responsible for initial setting of cement is

In the design of a plate girder, the outstand of web stiffener from the face of the web is restricted to (thickness of stiffener = t_q; and yield stress ratio = ε)

The BOD₅ of a wastewater sample is 200 mg/ litre at 20°C. The value of the reaction constant is K = 0.2 day^-1 with base 'e’. The ultimate BOD of the sample is :

Match List-I (Typical occurrence) with List –II (Relevant flow condition) and select the correct answer using the codes given below the lists:

List-I (Typical occurrence)

A) Cavitation

B) Separation

C) Stagnation point

D) Wake

List-II (Relevant flow condition)

1) Absence of fluid velocity

2) Fluid pressure reduces to vapour pressure

3) Bluff body in flow

4) Adverse pressure gradient in widening Boundaries of flow

A vertical cut in a clayey soil with unit weight of 19 kN/m³ failed when the depth of cut was 4.0 m. The cohesive strength of clay is:

The probability that a 100 year flood is equalled or exceeded at once in 100 year is

A doubly reinforced beam is used when:

Principal stresses at a point in a plane stressed element are σ_x = σ_y = 500 N/mm². Normal stress on the plane inclined at 45° to the x axis will be

The longitudinal gradient on a road is 1 in 20. If the radius of curve is 76 m, compensated gradient is

The artificial seasoning method that causes timber to become brittle and easy to break is

A compression member having gross effective cross-sectional areas of 1500 mm² and 1250 mm², respectively. If the compressive stress is 150 MPa, the design compressive strength of the column will be:

A grit chamber of dimension 12mx 1.5 m x 0.8 m liquid depth has a flow of 720 m³/hour. The surface loading rate and detention time of the grit chamber would be respectively:

If the dynamic viscosity of the fluid shown in the diagram is 0.001 N.s/m², what is the shear stress 30 cm from the wall?

A retaining wall retains a sand strata with ϕ = 30° up to its top. If a uniform surcharge of 12 t/m² is subsequently put on the sand strata, then the increase in the lateral earth pressure intensity on the retaining wall will be

For a catchment area of 120 km², the equilibrium discharge in m³/hour of an S-curve obtained by the summation of 6 hour unit hydrograph is

A reinforced cement concrete beam section has a size of 300 mm width and 400 mm effective depth, the grade of concrete used is M20 and grade of steel is Fe 415. If the ultimate bending moment of 150 kN-m acts at the section, the beam has to be designed as

A steel bar ABC of uniform cross-section 100 mm² is suspended vertically and loaded as shown in the figure. If the lower end of bar C does not move when loads are applied (neglect self-weight), then the value of force P is (E_S = 200 kN/mm²)

In an area of heavy rainfall, a state highway of high-type bituminous surface with four lanes (14.0 m wide) is to be constructed. What will be the height of the crown of the road relative to the edges for a composite camber (i.e. middle half as parabolic and rest as straight lines)?

The principal rafter of roof truss is inclined at an angle of 15°. No access is provided except maintenance. The roof is subjected to imposed d of 0.75 kN/m², the design imposed load is:

The maximum super elevation to be provided on a road curve is 1 in 15. If the rate of change of super elevation is specified as 1 in 120 and the road width including widening is 12 m then the minimum length of the transition curve is (when the outer edge is raised with respect to inner edge)

An isolated ‘T’ beam is used on walkway. The beam is simply supported with an effective span of 6 m. Effective width of flange for shown figure is :

The Euler’s crippling load for a 2 m long slender steel rod of uniform cross-section hinged at both the ends is 1 kN. The Euler’s crippling load for aim long steel rod of the same cross-section and hinged at both the ends will be

A symmetrical two-hinged parabolic arch when subjected to a uniformly distributed load on the entire horizontal span, is subject to

If the R.L of a B.M. is 100 .00 m, the back-sight is 1.215 m and the foresight is 1 .870 m, the R.L. of the forward station is:

A queen closer is

A steel plate of size 250 mm × 150 mm × 10 mm with holes for two number of 16 mm diameter bolts having ultimate strength of 410 MPa, the design strength of plate in rupture of critical section is

Three turbines each of capacity 10000 kW are installed at a hydel power station. If the peak load and the average load produced during a certain period are 25000 kW and 15000 kW respectively, then load factor and plant factor are respectively equal to

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 capacities is

Relation between Young’s modulus and cube strength of concrete is ____(Given by IS 456:2000)

A bar AC shown in the figure given below is fixed at both ends and is subjected to a torque t at B where AB = . Then torque at end A is

Two straight lines intersect at an angle of 60°. The radius of a curve joining the two straight lines is 600 m. The length of long chord and mid-ordinates, in metres, respectively of the curve are

What is the shape of the interaction curve for bolts subjected to both tension and shear?

Bolts A, B, C, D, E, F form a regular hexagon. Which sets of bolts will be equally stressed?

For an eccentric connection, what is the likely location of the Neutral Axis.?

Statement I: In an out of plane eccentrically loaded connection as shown in the figure, criticality test for axial stress in the lower bolt can be skipped.

Statement II: The lower bolt is unstressed since all compressive load is transferred through bearing.

For the given bracket column assembly, the force carried by the central bolt will be:

Diurnal declination is

Which of these statements is wrong?

A 3m thick clay layer over an impervious stratum is underlain by a 2m thick layer of sand. The region is initially dry. Find out the change in the value of effective stress in the short term at the middle of the clay layer if the region is suddenly flooded.

AssertionA.: For a saturated clayey soil, the effective stress increases immediately after increasing the surcharge.

Reason(R): Effective stress is given as the difference between total stress and pore water pressure.

A 2m × 2m footing exists at a depth of 1m below ground level in sandy soil. Calculate the increase in effective stress at 3m below the footing if the load on the column is 2000 kN. Assume 2:1 load distribution.