## DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

Q.62 In which of the following system is the sewage allowed to sprinkle over a bed of coarse, rough and hard filter media, and it is then collected through the under drainage system?

1. Contact beds

2. Trickling filters

3. Activated sludge process

4. Intermittent sand filters

Correct Option: 2

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

Q.63 Consider the below statements with respect to plate girders and identify the correct answer.

Statement A: The intermediate transverse stiffener increases the buckling resistance of the web caused by shear.

Statement B: When the computed shear stress in the web of a plate girder is less than the critical shear stress, intermediate stiffeners are theoretically not required.

1. Statement A is correct and B is incorrect.

2. Both statements are correct.

3. Statement B is correct and A is incorrect.

4. Both statements are incorrect.

Correct Option: 2

Q64. As per IS 456: 2000, to ensure the lateral stability in a cantilever beam, the clear distance from the free end of the cantilever to the lateral restraint shall not exceed ; where b is the breadth of the compression face midway

between the lateral restraints.

1.75 b

2.60 b

3.40 b

4. 25 b

Correct Option: 4

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

Q.65 Consider the below statements with respect to principles of surveying and identify the correct answer.

Statement A: Locate the position of a point on the ground by measurement from two reference points.

Statement B: Work from part to whole to prevent the undue accumulation of errors and thereby control and localize the minor errors.

1. Statement B is correct and A is incorrect.

2. Both statements are incorrect.

3. Statement A is correct and B is incorrect.

4. Both statements are correct.

Correct Option: 3

Q.66 Calculate the bulk modulus of an alloy body if its modulus of elasticity is found to be 180 Gpa. Consider that the Poisson’s ratio of tested material is 0.25.

1. 150GPa

2. 120GPa

3. 100GPa

4. 180GPa

Correct Option: 2

Q.67 As per IS 1130:1969, marble slabs shall be supplied with the thickness that ranges between

1. 20 and 150 mm

2. 15 and 75 mm

3. 50 and 200 mm

4.5 and 50 mm

Correct Option: 1

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

Q.68 Bernoulli’s equation is not applicable when the

1. flow is steady

2. fluid is ideal

3. flow is rotational

4. flow is incompressible

Correct Option: 3

Q.69 A soil sample has a porosity of 25%, calculate its void ratio.

1. 0.33

2. 0.67

3. 0.25

4. 0.50

Correct Option: 1

Q.70 The specific surface of cement is a property cement used to know the

1. soundness of cement

2. strength of cement

3. fineness of cement

4. specific gravity of cement

Correct Option: 3

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

Q.71 Identify the INCORRECT statement with respect to asbestos material.

1.When asbestos is heated at 550°C, asbestos loses elasticity and strength, becomes brittle and restores its properties on cooling.

2. Asbestos is used to make sheets (A.C. sheets) and boards for roofing.

3. Non-acid-resistant asbestos is represented by chrysotile asbestos.

4. Asbestos molecules are strongly bound together only in one direction, whereas the lateral bond with adjacent molecules is quite weak.

Correct Option: 1

Q72. Consider the below statements with respect to the design of RCC beams and identify the correct answer.

Statement A: Spacing of shear reinforcement in a simply supported RCC rectangular beam shall be reduced at the middle portion along the length of the beam when compared to a portion of the beam near the supports.

Statement B: The position of longitudinal reinforcement shall be above the neutral axis in case of a cantilever beam subjected to uniformly distributed load directed towards down.

1. Statement B is correct and A is incorrect.

2. Both statements are correct.

3. Statement A is correct and B is incorrect.

4. Both statements are incorrect.

Correct Option: 1

Q.73 Which of the following type of vibrators is suitable for compacting screed concrete layer laid on existing floors with a thickness of less than 20 cm?

1. Internal vibrator

2. Surface vibrators

3. Vibrating tables

4. Form vibrators

Correct Option: 2

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

Q.74 pick the odd one out with respect to the type of failure of tension members.

1. Block shear failure

2. Gross section yielding

3. Net section rupture

4. Lateral torsional flexural buckling

Correct Option: 4

Q.76 At the time of grinding of cement clinker, a small quantity of Gypsum is added to the clinker

1. to prevent the flash setting of cement

2. to reduce the amount of sulphates in cement

3. to reduce the shrinkage of cement

4. to increase the rate of hardening of cement

Correct Option: 1

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

Q.77 The average shear stress in a rectangular wooden beam 100 mm wide, 250 mm deep and 3 m long carrying a uniformly distributed load with an intensity of 40 KN/m is found to be 2.4 Mpa, calculate the maximum shear stress.

1. 2.4 MPa

2. 4.8 MPa

3. 5.2 MPa

4. 3.6 MPa

Correct Option: 4

Q.78 Which of the following tests on workability allows the concrete to fall from a certain height, so that concrete is compacted partially?

1. Flow test

2. Compacting factor test

3. Vee Bee consistometer test

4. Slump test

Correct Option: 2

Q.79 For open channel flow with hydraulic radius as characteristic length, the flow is classified as turbulent, if Reynold’s number of the flow is

1. more than 2000

2. less than 2000

3. more than 1000

4. less than 500

Correct Option: 1

Q80. In a traverse surveying, the direction of a line PQ of length 320 m measured in the whole circle bearing system is found to be 30°00′. Calculate its departure.

1. 160 m

2. 125.27

3. 277.12 m

4. 320 m

Correct Option: 1

DDA JE Civil Paper 1 April 2023 Shift 1 Part 3

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