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100+ Free RRB Radiographer Practice Questions

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Key Facts: RRB Radiographer Exam

100 MCQs

CBT question count

RRB CEN 04/2024 Paramedical Categories

90 minutes

Exam duration

RRB CEN 04/2024 Paramedical Categories

1/3 negative

Marking scheme deduction

RRB CEN 04/2024 Paramedical Categories

70% weight

Professional Ability section

RRB CEN 04/2024 Paramedical Categories

INR 500 / 250

UR-OBC / SC-ST-Female fees

RRB CEN 04/2024 Paramedical Categories

RRB Radiographer is a 90-minute CBT with 100 MCQs testing radiographic physics, anatomy, positioning, safety protocols, and general aptitude with 1/3 negative marking.

Sample RRB Radiographer Practice Questions

Try these sample questions to test your RRB Radiographer 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 electromagnetic waves has the shortest wavelength?
A.Gamma rays
B.Visible light
C.Microwaves
D.Radio waves
Explanation: Gamma rays have the shortest wavelength and highest frequency in the electromagnetic spectrum, followed by X-rays, ultraviolet, visible light, infrared, microwaves, and radio waves. In physics, wavelength and frequency are inversely proportional, and energy is directly proportional to frequency.
2Which bone is the longest and strongest bone in the human body?
A.Femur
B.Humerus
C.Tibia
D.Fibula
Explanation: The femur is the longest, heaviest, and strongest bone in the human body, extending from the hip to the knee. It plays a critical role in supporting body weight and facilitating movement.
3What is the primary target material used in the anode of a diagnostic X-ray tube?
A.Tungsten
B.Copper
C.Molybdenum
D.Lead
Explanation: Tungsten (W) is the primary target material used in diagnostic X-ray tube anodes due to its high atomic number (Z=74), high melting point (3422°C), and high thermal conductivity. These properties allow it to withstand the extreme heat generated during X-ray production without melting.
4Which organ system is primarily responsible for the exchange of oxygen and carbon dioxide?
A.Respiratory system
B.Circulatory system
C.Digestive system
D.Nervous system
Explanation: The respiratory system is primarily responsible for taking in oxygen from the air and expelling carbon dioxide from the body. This exchange occurs across the alveolar-capillary membrane in the lungs.
5In an X-ray tube, the cathode acts as the source of what particles?
A.Electrons
B.Protons
C.Neutrons
D.X-ray photons
Explanation: In an X-ray tube, the cathode (specifically the filament) is heated to release electrons via thermionic emission. These electrons are then accelerated toward the anode to produce X-rays.
6What type of radiation is produced when high-speed electrons are decelerated or deflected by the nuclei of target atoms?
A.Bremsstrahlung radiation
B.Characteristic radiation
C.Photoelectric effect
D.Compton scattering
Explanation: Bremsstrahlung radiation (braking radiation) is produced when projectile electrons lose kinetic energy and change direction as they interact with the electrostatic field of the target nucleus. This deceleration is converted into X-ray photons of varying energy levels.
7If the wavelength of an electromagnetic wave decreases, what happens to its frequency and energy?
A.Frequency increases and energy increases
B.Frequency decreases and energy increases
C.Frequency increases and energy decreases
D.Frequency decreases and energy decreases
Explanation: According to electromagnetic equations, wavelength is inversely proportional to frequency (c = f * lambda), and energy is directly proportional to frequency (E = h * f). Therefore, as wavelength decreases, frequency and energy must increase.
8Why is the anode rotated in diagnostic rotating anode X-ray tubes?
A.To dissipate heat over a larger area
B.To increase the velocity of electrons
C.To focus the electron beam onto a smaller spot
D.To increase the energy of the produced X-rays
Explanation: In diagnostic X-ray tubes, rotating the anode spreads the heat generated by the electron beam over a larger circular track (focal track). This prevents localized melting of the target and allows for higher tube currents and shorter exposure times.
9How many cervical vertebrae are present in the normal adult human vertebral column?
A.7
B.12
C.5
D.4
Explanation: The human spine contains 7 cervical vertebrae (labeled C1 through C7) in the neck region. These are followed by 12 thoracic vertebrae, 5 lumbar vertebrae, the sacrum (5 fused), and the coccyx (4 fused).
10What percentage of electron kinetic energy is converted into X-rays at the anode target in a typical diagnostic X-ray tube?
A.Approximately 1%
B.Approximately 99%
C.Approximately 50%
D.Approximately 10%
Explanation: In diagnostic X-ray tubes, only about 1% of the kinetic energy of the projectile electrons is converted into X-ray photons. The remaining 99% is converted into thermal energy (heat) due to constant excitation and ionization of outer-shell electrons of the target atoms.

About the RRB Radiographer Exam

RRB Radiographer Recruitment Exam is a computer-based test conducted for recruiting Radiographers in Indian Railways. The exam consists of 100 questions testing professional radiography knowledge, general math, reasoning, and science.

Assessment

Single-stage CBT. 70 professional questions and 30 general questions (General Awareness, Arithmetic/Reasoning, General Science). Negative marking of 1/3 per wrong answer.

Time Limit

90 minutes

Passing Score

Minimum qualifying marks: UR/EWS 40%, OBC/SC 30%, ST 25%

Exam Fee

INR 500 (General/OBC/EWS); INR 250 (SC/ST/PwBD/Female/Minorities) (Railway Recruitment Board (RRB))

RRB Radiographer Exam Content Outline

~25%

Anatomy, Physiology & Radiographic Physics

Human anatomy & physiology, general physics, electromagnetic spectrum, X-ray production, anode/cathode design, and Bremsstrahlung radiation

~20%

Equipment Maintenance & Accessories

X-ray machines & accessories, grid ratios, collimator checks, filtration, KVp and mAs adjustments

~20%

Clinical Radiography & Positioning

Routine radiographic positioning (chest, skull, spine, abdomen, pelvis, extremities)

~20%

Contrast & Special Radiography

Contrast procedures (barium swallow, IVP, HSG), X-ray Film/Image processing, dark room techniques, CR/DR sensors, developer/fixer chemistry

~15%

Radiation Safety, Quality Control & Ethics

ALARA, shielding, lead aprons, dosimetry badges (TLD/film), quality control tests, medical ethics, patient care, and contrast reactions

How to Pass the RRB Radiographer Exam

What You Need to Know

  • Passing score: Minimum qualifying marks: UR/EWS 40%, OBC/SC 30%, ST 25%
  • Assessment: Single-stage CBT. 70 professional questions and 30 general questions (General Awareness, Arithmetic/Reasoning, General Science). Negative marking of 1/3 per wrong answer.
  • Time limit: 90 minutes
  • Exam fee: INR 500 (General/OBC/EWS); INR 250 (SC/ST/PwBD/Female/Minorities)

Keys to Passing

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

RRB Radiographer Study Tips from Top Performers

1Deeply study radiation physics: X-ray production, Bremsstrahlung vs characteristic radiation, and grid/inverse square law calculations.
2Memorize standard positioning protocols (e.g. chest PA vs lateral, skull positioning lines like the radiographic baseline).
3Understand radiation protection guidelines (AERB/ICRP standards, TLD working mechanism, shielding thicknesses).

Frequently Asked Questions

What is the exam structure for RRB Radiographer?

The exam consists of 100 questions in 90 minutes. 70 questions are from Radiography Professional Ability, and 30 are from general areas (science, math, reasoning, awareness). There is a 1/3 negative marking.

What are the minimum qualifying marks for RRB Radiographer?

Candidates must score at least 40% for UR/EWS, 30% for OBC and SC, and 25% for ST to qualify.