DDA JE Civil Paper 29 March 2023 Shift 1 Part 1

Q1 Activated carbon is used in water treatment for:

1. removing corrosiveness
2. removing hardness
3. removing odour
4. disinfection

Correct Option: 3

Q.2 Identify the type of truss shown in the figure.

1. Redundant truss
2. Space truss
3. Perfect truss
4. Deficient truss

Correct Option:1

DDA JE Civil Paper 29 March 2023 Shift 1 Part 1

Q3 What is the maximum permissible limit of chemical oxygen demand present in wastewater effluent when discharging into an inland river or stream as per Central Pollution Control Board norms?

1250 mg/1
2. 350 mg/1
3. 100 mg/1
4. 500 mg/l

Correct Option:1

Q4, The principle of “incoming sewage is not allowed to get mixed up with the sludge produced, and the outgoing effluent is not allowed to carry with it large amounts organic load” is found in

1. sludge digestion tank
2. detention tank
3. septic tank
4. Imhoff tank

Correct Option: 4

Q5. A 20 m chain used for a survey was found to be 20.10 m at the beginning and 20.30 m at the end of the work. The area of the plan to a scale of 1 cm-8 m was measured with the help of a planimeter and was found to be 32.56 sq. cm. What is the true area of the field?

1.2122.51 sq. m
2. 2126.80 sq. m
3. 2125.52 sq. m
4. 2120.50 sq. m

Correct Option: 3

DDA JE Civil Paper 29 March 2023 Shift 1 Part 1

Q6. Select the correct option with regard to wastewater treatment.

1. Stabilisation ponds are open flow-through earthen basins designed to treat sewage and provide long detention periods up to 36 hours.
2. Septic tanks are primary sedimentation tanks to treat sewage with a longer detention period of several days.
1. Both statements are incorrect.
2. Statement 1 is incorrect, and statement 2 is correct.
3. Both statements are correct.
4. Statement I is correct, and statement 2 is incorrect.

Correct Option:1

Q7 The unsupported length between the end restraints of a column shall NOT exceed lateral dimension of a column as given in IS456-2000.
times the least

1 50
2.60
3. 40
4.70

Correct Option: 2

DDA JE Civil Paper 29 March 2023 Shift 1 Part 1

Q8 Which of the following factors does NOT affect workability of the concrete?

1. Grading of Aggregate
2. Water Content
3. Mix Proportions
4. Curing Temperature

Correct Option: 4

Q.9 The vertical component of the hydrostatic force on a submerged curved surface is the

1 mass of the liquid vertically above it
2. product of pressure at the centroid and the surface area
3. weight of the liquid vertically above it
4. force on a vertical projection of the surface

Correct Option: 3

Q.10 The maximum shear stress for the concrete grade of M25 is:

1.3.1 N/mm2
2. 4.0 N/mm2
3.2.8 Num?
4.2.5 Nimm

Correct Option:1

Q.11 The error due to the non-verticality of the vertical axis of a theodolite:

1. cannot be eliminated by any method
2. is eliminated in the methods of repetition and reiteration
3. is eliminated in the method of repetition only
4. is eliminated in the method of reiteration only

Correct Option: 1

Q13 Which of the following options is true with respect to the point of contraflexure?

1. Point of contraflexure occurs for a simply supported beam carrying point loads.
2. Point of contraflexure occurs when shear force changes its sign within the span length.
3. Point of contraflexure occurs for the overhanging beam subjected to uniformly distributed load.
4. Point of contraflexure occurs at the maximum bending moment.

Correct Option: 3

Q14 Which of the following is the Bogue compound in Ordinary Portland Cement?

1. Ettringite
2. Allite
3. Monosulphate
4. Calcium hydroxide

Correct Option: 2

Q15. The maximum area of compression reinforcement in a reinforce concrete beam shall NOT exceed IS456-2000, where b is the breadth of the beam and D is the overall depth of the beam.
as per

1 0.06 bD
2. 0.04 bD
3. 0.1 bD
4. 0.08 bD

Correct Option: 2

Q.16 Modem EDM instruments work on the principle of measuring:

1. the change in frequency of the electromagnetic waves
2. the reflected energy generated by electromagnetic waves
3. the phase difference between the transmitted and the reflected electromagnetic waves
4. the total time taken by electromagnetic waves in travelling the distance

Correct Option: 3

Q17. A rectangular footing of size 3 m 2 m exerts a pressure of 100 KN/m2 on a cohesive soil whose Young’s modulus is 5 x 10+ KN/m2 and mu is 0.5. What is the immediate settlement at the centre for flexible footing? Assume that for an
ratio of 1.5, shape factor (1) -1.36 for flexible footing at centre.

1. 3.18 mm
2. 5.2 mm
3. 4.68 mm
4. 4.08 mm

Correct Option: 4

Q.18 According to IS 456-2000, the unit weight of reinforced concrete made with sand and gravel stone aggregate may be taken as:

1 25 kN/m2
2. 26 kN/m2
3. 24 kN/m3
4 28 kN/m2

Correct Option: 1

Q.19. The following statements are related to the curing of concrete. Select the correct option 1. Concretes cured at higher temperatures initially lead to lower early strengths.
2. Curing is a process that facilitates (eases) hydration.

1. Statement I is correct, and statement 2 is incorrect.
2. Both statements are incorrect.
3. Statement 1 is incorrect, and statement 2 is correct.
4. Both statements are correct.

Correct Option: 3

Q.21 The value of the coefficient of curvature for well-graded soil lies between:

1. 1 and 3
2. 0 and 1
3. 5 and 8
4. 3 and 5

Correct Option: 1

Q.23 Soundness of aggregate test is important for which of the following types of atmosphere conditions?

1. Concrete exposed the action of frost
2. Concrete exposed to action of sunlight
3. Concrete exposed to action of rain
4. Concrete exposed to action of water

Correct Option: 1

Q.24 Which of the following pairs is NOT correctly matched with regard to the defects of timber?

1. Foxiness – It is a sign of decay appearing in the form of yellow or red tinge or discolouration on overmatured trees.
2.Star shakes – They are radial splits or cracks that are wide at the circumference, diminishing towards the centre of the tree.
3. Rind gall – It is caused due to injury or impact.
4. Heart shake – It occurs due to the shrinkage of heart wood when the tree is overmatured.

Correct Option: 3

Q.27 The concrete mix design for M25 grade was prepared to construct a highway pavement. What is the target mean strength of concrete mix if the standard deviation of 30 samples was found to be 4 N/mm2?

1. 30.4 N/mm2
2. 26.4 N/mm2
3. 31.4 N/mm2
4. 28.4 N/mm2

Correct Option: 3

Q.28 A standard 90° V-notch weir is used to measure discharge. The discharge is Q1 for height H1 above the sill, and Q2 is the discharge for height H2. If H1/H2 is 4, then Q2/Q1 is:

1.8
2. 16
3. 64
4. 32

Correct Option: 1

Q.29 Following are the tests conducted on Ordinary Portland Cement. Select the INCORRECT pair of the match between the type of test and apparatus used.

1. Soundness – Autoclave
2. Fineness of cement – Blaine’s air permeability
3. Heat of hydration test – Calorimeter test
4. Setting time – Cone slump cone

Correct Option: 4