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ESE 2022 CE Technical Quiz 17

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Question 1

Identify which among the following pairs of systems are same?
I.

II.

III.

IV.

Question 2

A construction concrete mixer of capacity 0.9 m³ is used and the mixer discharges the entire batch of concrete into a single hopper. The time per cycle for charging, mixing and discharging may be taken as 1.5 minutes and lost time may be taken as 0.15 minutes. The number of batches per hour is equal to:

Question 3

Which of the following artificial stone is produced by moulding a mixture of iron slag and port land cement.

Question 4

A thermal power plant burns coal at the rate of 8 t/h. The coal has sulphur content of 4.5%. The rate of emission of SO₂ Will be

Question 5

If the cost of purlins/unit area is p and the cost of roof covering/unit area is r, then cost of trusses/unit area l for an economical spacing of the roof trusses will be

Question 6

Following date is given for a active sludge process of waste water treatment plant :

Waste water flow = 0.6m³/s

Influent BOD = 50 mg/l

Efficient BOD = 5 mg/s

Volume of aeration tank = 1000 m³

MLSS = 3600 mg/l

MLVSS = MLSS/1.2

Compute F/M ratio (day^-1)

Question 7

A vertical cylindrical tank, 2m diameter has at the bottom, a 5 cm diameter, sharp-edged orifice, for which C_d = 0.6. Water enters the tank at a constant rate of 9l/sec. At what depth above the orifice will the level in the tank become steady?

Question 8

A 6 m high retaining wall with a vertical back has a backfill of silty sand with a slope of 10° for the backfill with values of K_H = 760 kg/m²/m and K_V =100 kg/m²/m, the total active earth pressure will approximately be

Question 9

A body is subjected to a direct tensile stress of 400 MPa in one plane accompanied by a simple shear stress of 150 MPa. The maximum normal stress will be

Question 10

Consider the following statements :

1. Sight distance available on the road to a driver at any instant depends on the height of the object above the road surface and height of the driver's eye above the road surface.

2. IRC has suggested the height of the object as 0.15 m and the height of the driver's eye as 1.2 m above the road surface

3. Sight distance depends upon the total reaction time of the driver and speed of the vehicle

4. Stopping sight distance will be more in case of downward gradient

Correct statement(s) is/are:

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Jun 6ESE & GATE CE