How to prepare for RPF Constable and Sub-Inspector: the CBT, the run and the measurements

A plan for the RPF Constable and SI recruitment: why General Awareness decides the 120-question CBT, how the one-third negative marking and 35% floor shape your attempt, and why the physical stages eliminate more candidates than the written test.

RPF Constable is an armed-force recruitment for the Railway Protection Force, open at Class-10 level, and it is unusual among written exams in one important way: the physical stages eliminate more candidates than the paper does. Success needs two things in parallel — a strong Computer Based Test score, which is what merit is drawn from, and the fitness and measurements to clear the qualifying physical gates. Constable and Sub-Inspector are usually notified together and prepared for the same way, so this guide covers both.

The structure, from the official pattern

Computer Based Test — 120 questions, 120 marks, a composite 90 minutes.

Section	Questions	Marks
General Awareness	50	50
Arithmetic	35	35
General Intelligence and Reasoning	35	35

A wrong answer costs one third of a mark. The minimum qualifying score is 35% for UR, OBC and EWS and 30% for SC and ST, and scores are normalised across shifts. After the CBT come the Physical Efficiency Test and Physical Measurement Test (both qualifying), then document verification and a medical examination.

Where the exam is won

The CBT decides merit, and within it the weighting is not even:

General Awareness is 50 of the 120 marks — the single largest and most improvable section. Cover the standard ground with static GK for SSC and railways and general awareness for railway and SSC, add the school-level science with general science for railway and defence exams, and read up on the Indian Railways and the RPF’s own role — those are easy marks for anyone who has looked.
Arithmetic is school level — speed and accuracy on basics matter far more than advanced technique. Build the base with elementary mathematics for 10th-level exams.
General Intelligence and Reasoning is the quickest to lift; work it with general intelligence and reasoning for SSC and police.

Respect the penalty and the floor

With a one-third-mark penalty and a 35% qualifying floor, disciplined skipping beats broad guessing. Attempt where you can rule out at least two options, and do not fling answers at questions you cannot narrow — the reasoning is in negative marking strategy. Because shifts are normalised, aim for accuracy and a strong raw score rather than trying to guess the difficulty of your slot.

Train the body from day one

The PET run and jumps, and the PST height and chest standards, decide as many outcomes as the paper — and the measurements are a hard threshold that preparation cannot change. Two rules:

Check the measurement table in the notification against yourself before you apply, since the height and chest standards differ by gender and category and eliminate candidates late.
Start stamina training immediately, not after the written result, because the gap between the two is not enough time to build fitness from cold.

A workable plan

Make General Awareness a daily habit across the whole cycle — it is the largest and most improvable block.
Drill arithmetic and reasoning for speed and accuracy until 120 questions in 90 minutes feels comfortable, and keep them warm with the daily quiz.
Run fitness training in parallel from the start.
Structure the weeks with how to build a study plan.

Practice that transfers

Rehearse under exam conditions. Take the RPF Constable full-length mock and complete details on the exam page — Sub-Inspector candidates can use the same paper — keep General Awareness current with the daily quiz, and drill each section until the 90-minute CBT is routine before you sit it.

Frequently asked questions

What is the biggest reason candidates fail RPF Constable?

The physical stages, not the written test. The Physical Efficiency Test is pass or fail, and the Physical Measurement Test applies fixed height and chest standards that no amount of study can change. Candidates who prepare only for the CBT and leave fitness until after the result are the ones most often eliminated, because the window between the written result and the physical test is short. Begin running and jumping practice from day one.

How important is General Awareness in the RPF CBT?

It is decisive. General Awareness is 50 of the 120 marks, more than either Arithmetic or Reasoning, and it is also the most improvable through steady revision. Candidates who divide their time as if all three sections were equal are under-preparing the largest one. Build a daily habit across static topics, the RPF's own role and the last year of current affairs.

How is RPF Constable different from RPF Sub-Inspector?

The written paper has the same structure, but Sub-Inspector requires a graduate degree against Class 10 for Constable, has a higher minimum age, starts at a higher pay level, and is a supervisory rank. The preparation for the CBT is essentially identical, which is why the two are usually notified together and can be prepared for in parallel.