ABB Placement Papers 2026: Test Pattern, Syllabus & Sample Questions

ABB recruits engineers in India through a three-stage process: an online aptitude and technical test, a technical interview, and an HR round.

ABB Ltd. is a Swiss multinational in electrification, motion, process automation, and robotics. Indian offices are spread across Bengaluru, Pune, Vadodara, and Nelamangala. Campus drives run both on-campus at partner engineering colleges and off-campus through ABB’s careers portal. The online test is the first filter, and clearing it is a matter of understanding the structure and then drilling branch-specific technical topics until time pressure stops being the binding constraint.

ABB Recruitment Process

The selection process has three mandatory stages and one conditional stage:

Stage	Format	What It Evaluates
Online Test	Proctored MCQ	Aptitude, reasoning, technical fundamentals
Group Discussion	Conditional; depends on drive	Communication, current-affairs awareness
Technical Interview	Face-to-face or virtual	Domain knowledge, problem-solving depth
HR Interview	Face-to-face or virtual	Cultural fit, communication, goals

ABB has not published official stage details in a publicly accessible recruitment FAQ. The breakdown above reflects reported campus placement experiences. Confirm the current format with your campus placement officer before the drive date.

ABB Online Test: Pattern and Structure

The online test covers three sections. ABB has not disclosed an official question count or per-section time limit, so the approximate weights below are drawn from reported campus drives:

Section	Core Topics	Approximate Weight
Verbal Ability	Reading comprehension, sentence correction, para-jumbles	Lower
Analytical Reasoning	Quantitative aptitude, logical reasoning, data interpretation	Moderate
Technical	Branch-specific (EEE/ECE or CSE/IT track)	Higher

The technical section carries the most weight in differentiation. Candidates applying through proctored platforms should expect a browser-lockdown environment. FACE Prep’s guide to the HirePro test format covers technical setup and test-day logistics for online campus assessments.

ABB Aptitude and Reasoning Syllabus

Verbal Ability

• Reading Comprehension: factual and inferential questions from short passages
• Sentence Completion and Correction
• Para-Jumbles: reordering jumbled sentences into a coherent paragraph
• Error Identification: spotting grammatical errors in underlined segments

Analytical Reasoning

• Numbers and Percentages, Ratios and Proportions
• Mixtures and Alligations
• Time and Work; Pipes and Cisterns
• Distance, Speed, and Time
• Data Interpretation: bar charts, pie charts, tables
• Coding-Decoding
• Blood Relations
• Syllogisms
• Attention to Detail and Visual Reasoning

The logical reasoning questions tend to be more time-consuming than the verbal ability questions within the same total time window. Practicing each topic type under a strict timer is more effective than untimed practice sets. FACE Prep’s Reliance placement paper guide covers similar aptitude patterns with additional worked solutions worth cross-referencing.

ABB Technical Section Syllabus

The technical section is branch-differentiated. Prepare the track that matches your degree.

EEE and ECE Track

• Electrical Machines: DC motors, transformers, three-phase induction motors
• Power Systems: switchgear, circuit breakers, protection relays
• Electronics: diodes, BJTs, MOSFETs, op-amps, filters
• Control Systems: transfer functions, Bode plots, PID controllers
• Signals and Systems: Fourier transforms, sampling theorem
• Power Electronics: rectifiers, inverters, DC-DC converters

The control systems and power electronics topics reflect ABB’s core business in drives, transformers, and automation equipment. Candidates with a solid grip on these topics tend to stand out in both the written test and the technical interview. Students preparing across multiple engineering-company drives will find useful overlap with the Texas Instruments placement test, which also tests analog circuits and control fundamentals at a similar depth.

CSE and IT Track

• Programming in C and C++: pointers, object-oriented principles, memory management
• Data Structures: arrays, linked lists, trees, graphs
• Algorithms: sorting, searching, recursion
• DBMS: normalisation, SQL queries, transaction management
• Operating Systems: processes, threads, memory management, scheduling
• Computer Networks: OSI model, TCP/IP, routing basics
• UNIX: basic commands, shell scripting

Sample Questions and Worked Solutions

The average-height problem that circulates in legacy ABB placement paper sets is incomplete as written: the answer requires the initial class size, which the question does not specify. It is omitted below. All remaining examples are verified from first principles.

Aptitude Questions

Mixture Problem

• Q: A 20-litre solution contains oil and kerosene in the ratio 3:5. After removing 4 litres and replacing with pure kerosene, what is the new ratio of oil to kerosene?
• Initial oil = 20 × (3/8) = 7.5 L; initial kerosene = 12.5 L.
• Remove 4 L proportionally: oil removed = 4 × (3/8) = 1.5 L; kerosene removed = 2.5 L.
• After removal: oil = 6 L; kerosene = 10 L. Add 4 L kerosene: oil = 6 L; kerosene = 14 L.
• Answer: 3:7

Train Crossing a Pole

• Q: A train 150 metres long runs at 54 km/hr. How long does it take to cross a pole?
• Convert speed: 54 km/hr = 54 × (5/18) = 15 m/s.
• Time = 150 ÷ 15 = 10 seconds

Number Series

• Q: Find the next term: 2, 6, 12, 20, 30, ?
• Differences between consecutive terms: 4, 6, 8, 10, 12 (each gap increases by 2).
• Answer: 42

Pipes and Cisterns

• Q: Pipe A fills a cistern in 6 hours; Pipe B fills it in 8 hours. Both open together, how long to fill?
• Combined fill rate = 1/6 + 1/8 = 4/24 + 3/24 = 7/24 per hour.
• Time = 24/7 ≈ 3.43 hours

Syllogism

• Q: All shares are debentures. No debentures are deposits. Which conclusion follows?
• Shares form a subset of debentures. No debenture is a deposit. Therefore no share can be a deposit.
• Answer: No shares are deposits

Technical Questions

Power Supply Voltage Regulation (EEE/ECE)

• Q: A power supply with output resistance 1.5 Ω supplies 500 mA full-load current to a 10 Ω load. What is the percent voltage regulation?
• Full-load voltage: V_FL = 0.5 A × 10 Ω = 5 V.
• No-load voltage: V_NL = 5 + (0.5 × 1.5) = 5.75 V.
• % Voltage Regulation = ((5.75 − 5) / 5) × 100 = 15%

Motor Torque-Speed Characteristic (EEE/ECE)

• Q: An electric motor with constant output power will have what form of torque-speed characteristic?
• Output power P = T × ω. At constant P, torque T = P/ω. Speed and torque vary inversely.
• Answer: Rectangular hyperbola

C Program with extern Variable (CSE/IT)

• Q: What does the following program output?

#include <stdio.h>
int main() {
    extern int a;
    printf("%d", a);
    return 0;
}
int a = 20;

• The extern int a declaration inside main tells the compiler that a is defined elsewhere, not a new local variable. The global definition int a = 20 resolves it at link time.
• Answer: 20

Python Mutable Default Argument (CSE/IT)

• Q: What does the following code print?

def func(a, b=[]):
    b.append(a)
    return b

print(func(1))
print(func(2))

• First call: b is the default empty list; append 1; return [1].
• Second call: b is the same list object from the first call (Python does not re-initialise mutable defaults); append 2; return [1, 2].
• Answer: [1] on the first line, [1, 2] on the second

Preparing for ABB: A Practical 4-Week Plan

Week	Focus	Activities
Week 1	Aptitude foundations	Arithmetic, ratios, time-work; time each practice session at 45 minutes
Week 2	Logical reasoning and data interpretation	Syllogisms, coding-decoding, bar charts and tables; full timed sets
Week 3	Branch-specific technical	Pick 3 to 5 core subjects from your track’s syllabus above; re-derive key formulas
Week 4	Full mock tests	Simulate complete test conditions; no breaks; review every wrong answer

Three rules that compound across the four weeks:

• Attempt every question until you confirm whether your specific drive has negative marking. No confirmed penalty means no reason to leave any question blank.
• Prioritise the technical section over the verbal section. Most candidate elimination happens on technical content, not grammar.
• Re-derive formulas from first principles rather than memorising answers. The technical interview will test the same understanding the written test probes.

The Gap Between the Written Test and the Interview

Clearing the online test is the first of three rounds. The technical interview is where many candidates who scored well in the written test still lose out.

ABB’s roles sit at the intersection of hardware and software. The control systems and C++ topics in ABB’s syllabus are the same foundations that industrial automation software is built on. ABB’s product lines include industrial IoT platforms and AI-assisted condition monitoring tools. The engineers who work on those products apply exactly the control theory and C++ the written test covers at a surface level. A candidate who can explain how their final-year project connects to control systems or embedded software will outperform one who prepared only for MCQ formats.

If you want to see how those engineering foundations connect to the AI tools that automation companies now build on top of them, TinkerLLM is a low-cost entry point at ₹299. The C++ and control systems groundwork in ABB’s syllabus also underlies how LLM-based tools get integrated into industrial monitoring workflows. That connection is worth understanding before the technical interview, not after.