## DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q1. What is the main purpose of providing a ventilation column in the sewerage line?

1. To provide sunlight inside the sewer line

2. To clear off the foul gas generated in the sewage while flowing

3. To allow stormwater into the sewer

4. To make provision for a person to enter inside for cleaning

Correct Option: 2

Q2. According to IS 456-2000, the maximum permissible limit of Chlorides present in freshwater used for reinforced concrete work is

1. 1000 mg/1

2. 200 mg/1

3. 2000 mg/l

4. 500 mg/l

Correct Option: 4

Q.3 The following statements are related to the sewers. Select the correct option from the following.

1. Circular sewers are suitable only where a variation of discharge is not large, thus suitable even for a combined sewerage system.

2. Oval shape sewers are suitable for a combined sewerage system as they carry varying discharges.

1. Both statements 1 and 2 are false.

2. Both statements 1 and 2 are true.

3. Statement 1 is false and 2 is true.

4. Statement 1 is true and 2 is false.

Correct Option: 3

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q4. The primary properties of a building materials are:

Density, specific weight, hardness, durability, elasticity and strength.

Select only the mechanical properties from the following options.

1. Density, durability, hardness

2. Strength, durability, hardness

3. Strength, hardness, elasticity

4. Specific weight, strength, hardness

Correct Option: 3

Q5. The maximum permissible limit of calcium concentration present in drinking water in the absence of an alternate source of water as per IS code 10500-2012 is

1. 30 mg/1

2. 75 mg/1

3. 200 mg/1

4. 100 mg/l

Correct Option: 3

Q.6 Match the following hydraulic machineries and their types of operating principles.

Hydraulic machinery

1. Centrifugal pump

2. Reciprocating pump

3. Pelton wheel

Type of operating principle

A. Positive displacement

B. Axial flow

C. Priming

4. Kaplan turbine

D. Impulse

1. 1-C, 2-B, 3-D, 4-A

2. 1-B, 2-A, 3-D, 4-C

3. 1-C, 2-A, 3-D, 4-B

4. 1-C, 2-D, 3-A, 4-B

Correct Option: 3

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q.7 Which of the following statements is valid for the shear strength of a cohesionless soil?

1. The shear strength is directly proportional to the tangent of the angle of shearing resistance.

2. The shear strength is proportional to the cosine of the angle of shearing resistance.

3. The shear strength of soil is independent of the angle of internal friction of soil.

4. The shear strength is inversely proportional to the tangent of the angle of shearing resistance.

Correct Option: 4

Q.8 The placing of concrete in an underwater environment, which of the following methods or techniques is NOT suitable?

1. Bucket placing method

2. Grouting method

3. Chute method

4. Tremie method

Correct Option: 3

Q.12 The particle size analysis of fine grained soils can be more accurately determined in the laboratory by the

1. pipette method

2. cone penetrometer method

3. sand bath method

4. pycnometer method

Correct Option: 1

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q.13 Darcy’s law is applicable for which type of soils?

1. Fine sand

2. Coarse aggregates

3. Boulders

4. Gravel

Correct Option: 1

Q.14 The average compressive strength of a class-10 burnt clay brick as per IS 1077-1992 should NOT be less than

1. 20 N/mm2

2. 30 N/mm2

3- 40 N/mm2

4- 10 N/mm2

Correct Option: 4

Q.15 1.Which of the following statements is NOT correct with respect to the slow sand filter in the drinking water treatment plant?

1.Slow sand filtration is suitable when raw water turbidity does not exceed 30 NTU, EXCEPT occasionally for a few days.

2. Backwashing is used for cleaning the filter bed.

3. The effective size of sand used is in the range between 0.15 and 0.3 mm.

4. It removes bacteria effectively up to 90%.

Correct Option: 2

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q.16 Select the correct statement with respect to the concept of equivalent pipe used in flow through pipes.

1.The velocity of flow in the equivalent pipe is equal to the sum of the velocities of the compound pipe consisting of different pipes.

2 The length of an equivalent pipe is equal to the sum of the lengths of the compound pipe consisting of different pipes and not equal to the sum of the head loss of compound pipes.

3. The diameter of the equivalent pipe is equal to the sum of the diameter of a compound pipe consisting of different pipes.

4. The discharge and loss of head in the equivalent pipe are equal to the sum of the discharges and loss of head of a compound pipe consisting of several pipes of different lengths.

Correct Option: 4

Q.17 Soils are classified into 8 groups of coarse-grained, 9 groups of fine-grained and one of peat in which type of soil classification?

1. AASHTO soil classification system

2. Unified soil classification system

3. Indian standard classification system

4. Massachusetts Institute of Technology classification system

Correct Option: 3

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q22. Statistical based quality control for concrete is carried out for a highway project in which 37 concrete samples were tested randomly. The average strength was found to be 40 MPa with a square of deviation of 400 MPa2. What is the standard deviation of the test samples?

1. 4.33 MPa

2. 8.33 MPa

3. 6.33 MPa

4. 3.33 MPa

Correct Option: 4

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q.24 A mild steel rod of 4 mm diameter is bent into a circular shape of a 4 m radius. Find the maximum stress induced in the rod. Take Young’s Modulus of the rod equal to 200GPa.

1. 100 MPa

2. 85 MPa

3. 75 MPa

4. 120 MPa

Correct Option: 1

Q.27 A subtense bar in a tacheometric survey is used to measure the

1. elevation of a point with respect to mean sea level

2 bearing of a point with respect to North

3. slope of terrain

4. horizontal distance between two points

Correct Option: 4

Q.28 In a traverse surveying, the direction of a line AB of length 150 m measured in the whole circle bearing system is found to be 60°00′. Calculate its latitude.

1. 75 m

2. 150 m

3. 100 m

4. 50 m

Correct Option: 1

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

Q.29 Which of the following is NOT a mode of failure of an axially loaded RCC column?

1. Combined compression and bending failure

2. Pure compression failure

3. Failure by elastic instability

4. Failure by punching

Correct Option: 4

Q.30 A manometer containing mercury and water has a gauge difference of 500 mm. What is the difference in pressure?

1. 8.3 m of water

2. 7.3 m of water

3. 6.3 m of water

4. 9.3 m of water

Correct Option: 3

DDA JE Civil Paper 29 March 2023 Shift 3 Part 1

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