Common RRB Group D mistakes

Most people who miss RRB Group D selection are capable of clearing it. They make one or two avoidable mistakes, and in a crowded merit list where many candidates sit within a few marks of each other, one mistake is enough.

The mistakes fall into four groups: how you study, what you do in the exam hall, how you prepare for the PET, and your paperwork. Read all twelve, then use the self-check at the end to find the ones that are yours.

Study mistakes

1. Skipping NCERT science

General Science has 25 questions, set at about Class 9–10 level. Candidates who rely only on lists of one-liners often miss easy marks, because the questions test the idea behind the fact: why a reaction happens, which lens forms which image, what a unit measures.

Fix: read the NCERT Class 9 and 10 science chapters once, properly, and make your own short notes. Then use one-liners for revision, not as your first reading.

2. Weak arithmetic basics

A percentage question that should take 40 seconds takes two minutes when the basics are shaky, and those minutes come out of reasoning and science.

Fix: learn tables up to 20, squares up to 30 and the common fraction–percentage pairs (1/8 = 12.5%, 1/6 = 16⅔%). Do 20 arithmetic questions a day with a timer. Our maths plan sets out the order.

3. Too many books and channels

Collecting material feels like progress. Finishing material is progress.

Fix: one book per section, a set of past papers and one mock series. Finish them before you add anything.

4. Leaving General Awareness to the last month

Twenty GA questions are twenty marks. Current affairs from the last six months or so cannot be crammed in one week.

Fix: 20 minutes of news and notes every day from the start. Revise your notes every Sunday.

Exam-hall mistakes

5. Mocks without analysis

Taking test after test without checking the mistakes gives you a number, not an improvement.

Fix: spend about 30 minutes studying each mock, section by section: right, wrong, skipped and time taken. Write down why each wrong answer went wrong.

6. Blind guessing

Each wrong answer costs ⅓ mark. With four options, a blind guess is right one time in four. On average, over 12 blind guesses you get 3 right and 9 wrong: 3 − 3 = 0. All risk, no gain.

Fix: guess only after ruling out at least one option, and ideally two. With two gone, 12 guesses average 6 right and 6 wrong: 6 − 2 = +4.

7. Getting stuck on one question

Spending four minutes on one hard puzzle costs you four or five easy questions at the end.

Fix: if a question is not moving after about a minute and a half, mark it for review and go on. Come back if time allows.

8. Misreading the question

"Which of the following is NOT…" read as "which is…" is a lost mark you actually knew.

Fix: read every question to the last word, and read the options only after you know what is being asked.

PET mistakes

9. Starting PET training late

The 1,000 m run (4 minutes 15 seconds for men, 5 minutes 40 seconds for women) and the weight carry (35 kg or 20 kg for 100 m in 2 minutes) need weeks of steady training. The PET usually comes a few months after the CBT, but starting after the CBT result leaves too little time for many candidates.

Fix: start a walk–jog routine in your first week of preparation. See the PET standards guide.

10. Overtraining and injury

Running too hard, too soon leads to shin pain or knee injuries just before the PET, and the PET usually gives you one chance.

Fix: increase your weekly distance slowly, wear proper shoes, and rest at least one day a week.

Paperwork mistakes

11. Careless post preferences

Listing posts whose medical standard you cannot meet wastes preferences. Leaving out posts you would accept can cost a selection. For example, Pointsman-B is in medical category A-2, which needs 6/9 vision in each eye without glasses, as reported for recent notices.

Fix: get an eye test before applying, check each post's medical category in the CEN, and rank only posts you would join.

12. Certificate problems

Name spelt differently on two documents, a caste certificate in the state format instead of the central government format, an OBC non-creamy layer certificate not valid for the period in the notice. Any of these can cost a reserved seat or the whole selection at document verification.

Fix: check every document now, months before DV, and start corrections early. Our document verification guide has a full list.

The twelve at a glance

A self-check

Tick each line that is true for you today.

• I have read the NCERT science chapters at least once.
• I practise arithmetic every day with a timer.
• I read GA for 20 minutes every day.
• I analyse every mock, section by section.
• My mock accuracy is above 80%.
• I guess only after ruling out options.
• I train for the PET at least four days a week and rest one.
• I know the medical category of every post I will list.
• My name and date of birth match on every document.

The first line you could not tick is your mistake for this week. Fix it, then come back to the list next week.