100+ Free DSSSB AE Practice Questions

Pass your DSSSB Assistant Engineer Recruitment Examination exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

N/A Pass Rate

100+ Questions

100% Free

Loading practice questions...

Same family resources

Explore More DSSSB Engineering Recruitment Exams (Delhi)

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

DSSSB Junior Engineer Examination

Practice Questions100 questions

2026 Statistics

Key Facts: DSSSB AE Exam

200

Tier-I MCQs

DSSSB Scheme

40%

Qualifying Score

General Category

₹100

Exam Fee

Exemptions apply

0.25

Negative Mark

Per wrong answer

2 hours

Exam Time

Tier-I Limit

Degree

Prerequisite

Engineering degree

The DSSSB Assistant Engineer (AE) exam is a computer-based competitive recruitment test. It comprises a Tier-I screening exam with 200 MCQs (100 in general sections, 100 in core engineering disciplines) and a Tier-II main exam. A negative marking of 0.25 is applied for wrong answers.

Sample DSSSB AE Practice Questions

Try these sample questions to test your DSSSB AE exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following constituents of cement is responsible for the initial setting time of cement and reacts fastest with water?

A.Tricalcium aluminate ($C_3A$)

B.Tricalcium silicate ($C_3S$)

C.Dicalcium silicate ($C_2S$)

D.Tetracalcium aluminoferrite ($C_4AF$)

Explanation: Tricalcium aluminate ($C_3A$) reacts fastest with water and is responsible for the flash set (initial setting) of cement. It produces a high heat of hydration. Gypsum is added during grinding to retard this rapid setting action.

2According to Abrams' water-cement ratio law, how is the compressive strength of fully compacted concrete related to the water-cement ratio?

A.Inversely proportional to the water-cement ratio

B.Directly proportional to the water-cement ratio

C.Independent of the water-cement ratio

D.Directly proportional to the square root of the water-cement ratio

Explanation: Abrams' law states that for a given workability and full compaction, the strength of concrete is inversely proportional to the water-cement ratio by volume. The general formula is $S = A / B^x$, where $x$ is the water-cement ratio, and $A$ and $B$ are constants.

3As per IS 4031, what is the specified minimum initial setting time and maximum final setting time for Ordinary Portland Cement (OPC)?

A.30 minutes and 600 minutes

B.45 minutes and 480 minutes

C.60 minutes and 120 minutes

D.30 minutes and 300 minutes

Explanation: Indian Standards (IS 269/4031) state that for Ordinary Portland Cement (OPC), the initial setting time must not be less than 30 minutes, and the final setting time must not be more than 600 minutes (10 hours).

4Using Bogue's equations, calculate the approximate percentage of Tricalcium Silicate ($C_3S$) in a clinker having the following oxide composition: $SiO_2 = 21.5\%$, $Al_2O_3 = 5.2\%$, $Fe_2O_3 = 3.2\%$, and $CaO = 63.5\%$. (Assume free lime and minor oxides are negligible, and Bogue's multiplier for $C_3S$ is $4.071 \cdot CaO - 7.600 \cdot SiO_2 - 6.718 \cdot Al_2O_3 - 1.430 \cdot Fe_2O_3$).

A.55.3%

B.42.5%

C.68.1%

D.28.4%

Explanation: Substitute the oxide values into the Bogue's equation for $C_3S$: $C_3S = 4.071 \cdot (63.5) - 7.600 \cdot (21.5) - 6.718 \cdot (5.2) - 1.430 \cdot (3.2)$ $C_3S = 258.5085 - 163.4 - 34.9336 - 4.576 = 55.6\%$. The closest match is 55.3%.

5For wearing course aggregates in road pavements, what is the maximum permissible Aggregate Impact Value (AIV) according to Indian Road Congress (IRC) specifications?

A.30%

B.45%

C.20%

D.35%

Explanation: As per IRC guidelines, the aggregate impact value (AIV) should not exceed 30% for wearing courses (surfacing) and 45% for base courses of road construction.

6What causes the bulking of sand (fine aggregate) when it contains surface moisture?

A.Surface tension of water forming a thin film around sand particles

B.Absorption of water into the molecular structure of quartz

C.Chemical hydration reaction between sand particles and water

D.Electrostatic repulsion between dry sand grains

Explanation: Bulking of sand occurs because moisture forms a thin film of water around the sand grains. This film exerts surface tension, pushing the particles apart and increasing the overall bulk volume of the sand. It is maximum at a moisture content of around 4-6%.

7During the standard consistency test of cement using Vicat's apparatus, what should be the depth of penetration of the plunger from the top of the mold?

A.33 to 35 mm

B.5 to 7 mm

C.10 to 12 mm

D.20 to 25 mm

Explanation: Standard consistency of cement paste is defined as that consistency which permits the Vicat plunger to penetrate to a depth of 33 to 35 mm from the top of the mold (or 5 to 7 mm from the bottom).

8A brick wall of dimensions $5\text{ m} \times 3\text{ m} \times 0.2\text{ m}$ is to be constructed using modular bricks of size $19\text{ cm} \times 9\text{ cm} \times 9\text{ cm}$. Assuming a $10\text{ mm}$ thick mortar joint and $5\%$ waste during execution, calculate the total number of bricks required.

A.1575 bricks

B.1500 bricks

C.1425 bricks

D.1650 bricks

Explanation: 1. Volume of the brick wall = $5 \times 3 \times 0.2 = 3.0\text{ m}^3$. 2. Nominal size of modular brick with mortar = $20\text{ cm} \times 10\text{ cm} \times 10\text{ cm} = 0.2\text{ m} \times 0.1\text{ m} \times 0.1\text{ m} = 0.002\text{ m}^3$. 3. Theoretical number of bricks = $\text{Wall Volume} / \text{Nominal Brick Volume} = 3.0 / 0.002 = 1500\text{ bricks}$. 4. Adding 5% wastage: $1500 \times 1.05 = 1575\text{ bricks}$.

9According to IS 456, what is the recommended slump range for concrete used in heavily reinforced sections like slabs, beams, and columns under normal placing conditions?

A.50 to 100 mm

B.25 to 75 mm

C.100 to 150 mm

D.0 to 25 mm

Explanation: As per IS 456:2000, concrete placement in medium workability applications such as heavily reinforced sections in slabs, beams, walls, and columns should have a slump value in the range of 50 to 100 mm.

10What is the primary objective of seasoning timber before using it in construction?

A.To reduce the moisture content to an equilibrium level to prevent decay and warping

B.To increase the content of natural resins and sap within the wood fibers

C.To darken the wood fibers and improve aesthetic appeal

D.To soften the wood so that it can be easily cut and carved

Explanation: Seasoning is the process of drying timber to remove excess sap and moisture. This reduces its weight, increases its strength, renders it less susceptible to decay/fungal attack, and prevents shrinkage, warping, or cracking.

About the DSSSB AE Exam

Computer-based recruitment examination for Assistant Engineer positions under various departments of the Government of Delhi.

Questions

200 scored questions

Time Limit

2 hours

Passing Score

40%

Exam Fee

₹100 (DSSSB (Delhi Subordinate Services Selection Board))

DSSSB AE Exam Content Outline

15%

Building Materials & Construction

Cement, concrete technology, bricks, stones, timber, and estimating

15%

Surveying & Levelling

Levelling, corrections, traverse balancing, curves, Simpson's rule, GPS

20%

Structural Analysis & RCC/Steel Designs

Indeterminacy, deflections, stress limits, column buckling, RCC and steel design details

15%

Soil Mechanics & Foundation Engineering

Physical index properties, permeability, stress distribution, bearing capacity, slope stability

15%

Fluid Mechanics & Hydraulic Machinery

Fluid properties, pipe flow losses, hydraulic jump, specific speed of turbines, cavitation, pumps

20%

Environmental & Water Resources Engineering

Water treatment, BOD kinetics, wastewater, noise/air pollution controls, hydrology, dams and spillways

How to Pass the DSSSB AE Exam

What You Need to Know

Passing score: 40%
Exam length: 200 questions
Time limit: 2 hours
Exam fee: ₹100

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

DSSSB AE Study Tips from Top Performers

1Dedicate balanced time to both Section A (General) and Section B (Technical), as passing both separately is mandatory.

2Practice numerical problems in RCC design, soil mechanics, and hydrology regularly to gain speed.

3Understand the application of Indian Standards (IS 456 for concrete, IS 800 for steel) as codes are frequently tested.

4Attempt mock tests to practice time management, keeping in mind the 0.25 negative marking penalty.

5Revise core definitions and unit conversions which are essential for screening exams.

Frequently Asked Questions

What is the exam structure for the DSSSB AE Recruitment?

The recruitment consists of two tiers. Tier-I is a screening exam containing 200 multiple-choice questions (100 from General sections like Reasoning, Hindi, English, GK, and Math; 100 from the core engineering discipline) with a duration of 2 hours. Tier-II is a descriptive/objective main exam focused entirely on the relevant engineering field.

Is there negative marking in the DSSSB AE exam?

Yes, a negative marking of 0.25 marks is applied for each incorrect answer in both Tier-I and Tier-II examinations. Unanswered questions do not attract negative marks.

What is the minimum qualifying score for DSSSB AE?

The minimum qualifying marks for the written exam are 40% for General/EWS, 35% for OBC (Delhi), and 30% for SC/ST/PH categories. This qualifying mark must be obtained separately in Section A (General) and Section B (Technical).

Are candidates from other states eligible to apply?

Yes, Indian citizens from any state can apply for DSSSB AE recruitment. However, reservation benefits (such as OBC reservation) are restricted to candidates holding valid Delhi-issued certificates.

What is the application fee for DSSSB AE?

The application fee is ₹100 for General and OBC male candidates. Women candidates and candidates belonging to Schedule Caste (SC), Schedule Tribe (ST), and PwD categories are exempted from paying the fee.