Practice Respiratory System RRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise Biology question set covers important concepts related to the human respiratory system, respiratory organs, breathing and the exchange of gases.
The questions cover important areas such as the nose, nasal cavity, pharynx, larynx, trachea, bronchi, lungs, alveoli, diaphragm, breathing mechanism, inhalation and exhalation, exchange of oxygen and carbon dioxide, and cellular respiration. These concepts are important for General Science and Biology preparation for Railway examinations.
Start practicing Respiratory System RRB PYQs with answers and explanations and strengthen your Railway Biology preparation.
21
All the statements below regarding inhalation in humans are correct except one. Which is NOT correct? A. Ribs move inward and diaphragm is raised. B. Ribs are lifted up and diaphragm becomes flat. C. Chest cavity becomes larger. D. Air is sucked into the lungs.
RRB Group-D
26/08/2022 (Shift-III)
2022
✓ Answer:AA
During inhalation, the diaphragm contracts and flattens, and the ribs move upward and outward. Thoracic volume increases and air enters the lungs. Statement A describes the opposite movement.
22
How many times does an adult human breathe per minute at rest?
RRB Group-D
12/09/2022 (Shift-I)
2022
✓ Answer:C15–18
The source gives about 15–18 breaths per minute as the typical resting rate. The usual adult reference range is broader, commonly 12–20 breaths per minute.
23
How many times on average does an adult human being at rest breathe in and out in a minute?
RRB Group-D
26/08/2022 (Shift-IV)
2022
✓ Answer:B15–18 times
The source gives about 15–18 breaths per minute as a typical resting value. Resting adult breathing rates vary within a broader normal range.
24
Aerobic respiration requires the presence of _____.
RRB Group-D
30/08/2022 (Shift-III)
2022
✓ Answer:DOxygen
Aerobic respiration uses oxygen to support the complete oxidation of food molecules, releasing energy and producing carbon dioxide and water.
25
What is the reason that the lungs have alveoli?
RRB Group-D
07/10/2022 (Shift-III)
2022
✓ Answer:DTo increase the surface area
The many alveoli provide a large surface area for efficient exchange of oxygen and carbon dioxide between air and blood.
26
What happens when we exhale during normal breathing?
RRB Group-D
19/09/2022 (Shift-I)
2022
✓ Answer:BA residual amount of air remains in the lungs
Air remains in the lungs after normal expiration, allowing gas exchange to continue. Strictly, the amount remaining after a normal expiration is functional residual capacity.
27
Which of the following has the fastest breathing rate?
RRB Group-D
08/09/2022 (Shift-I)
2022
✓ Answer:AFish
The source selects fish, using the textbook principle that aquatic animals ventilate rapidly because water contains less available oxygen than air. Actual rates vary by species and conditions.
28
What is exhaled in human respiration?
RRB NTPC (Stage-I)
05/04/2016 (Shift-III)
2016
✓ Answer:DCarbon dioxide
The source key selects carbon dioxide as the respiratory waste gas. Exhaled air is actually a mixture containing nitrogen, oxygen, carbon dioxide and water vapour, so option A is also scientifically valid under this wording.
29
Identify the correct labels a, b and c in the human respiratory-system diagram. Text description: a points to the passage behind the nasal and oral cavities; b points to the voice-box region; c points to the windpipe below it.
RRB Group-D
09/09/2022 (Shift-III)
2022
✓ Answer:Ca–Pharynx, b–Larynx, c–Trachea
The pharynx is the throat passage, the larynx is the voice box, and the trachea is the windpipe leading toward the bronchi.
30
What is the function of alveoli?
RRB NTPC (Stage-I)
04/02/2021 (Shift-I)
2021
✓ Answer:DTo provide a surface where exchange of gases takes place
Alveoli provide a large, thin surface where oxygen enters the blood and carbon dioxide leaves it by diffusion.
Each question includes the correct answer and a clear explanation, helping you understand the concept behind the answer and revise important Biology topics effectively. Practising Respiratory System Previous Year Questions can also help you become familiar with the types of Biology questions asked in RRB examinations.
Whether you are preparing for RRB NTPC Respiratory System PYQ, RRB Group D Respiratory System PYQ, RRB JE Respiratory System PYQ, RRB ALP Respiratory System PYQ, or RRB Technician Respiratory System PYQ, practice these previous year questions regularly to strengthen your Biology preparation.
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