Knowledge Booster: NAIR Edition (25 May 2026)
Welcome to today's NAIR Knowledge Booster! We've handpicked 10 essential questions from our database to help you sharpen your skills. Dive in and test your knowledge!
Q1. When does the 'A' marker get illuminated in a Semi-Automatic Stop signal?
- A) When the signal works as a Manual Stop signal
- B) When the signal works as an Automatic Stop signal
- C) When the signal works as a Semi-Automatic Stop signal
- D) When the signal works as an Advance Stop signal
Correct Answer: When the signal works as an Automatic Stop signal
Explanation: The 'A' marker indicates the signal is operating in its automatic (uncontrolled) state. [cite: 461, 479]
Q2. When the control is interrupted and no communication with the controller is possible who will be responsible for working and regulating of train?
- A) Station Master
- B) Chief Controller
- C) AOM/DOM (Control)
- D) Sr.DOM
Correct Answer: Station Master
Explanation: In the absence of centralized control communication, the local Station Master assumes full responsibility for train regulation[cite: 1490, 1503].
Q3. When the train is required to stop and the restriction is likely to last only for a day or less three detonators shall be placed at a distance of in BG."
- A) 1200m
- B) 800m
- C) 600m
- D) 400m
Correct Answer: 1200m
Explanation: For short-duration stops, detonators are placed at 1200 meters to provide stopping distance. [cite: 291, 302]
Q4. Formula of Loco outage is?
- A) Total engine hours from shed/24
- B) Engine hours for traffic use/12
- C) Total engine hours from shed/12
- D) Engine hours for traffic use/24
Correct Answer: Engine hours for traffic use/24
Explanation: Loco outage is calculated by taking the total hours locomotives were available for traffic and dividing by 24 hours[cite: 3668, 3676, 3688].
Q5. How many dead engines can be attached to Mail/Express/Superfast trains?
- A) 1
- B) cannot be attached
- C) 2
- D) None of these
Correct Answer: 1
Explanation: High-speed passenger trains are restricted to hauling only one dead (non-functional) locomotive for safety and weight reasons[cite: 3774, 3775, 3796].
Q6. Free time for un-loading of BTPN type of wagon under Engine on load scheme is given as?
- A) 5 hours
- B) 6 hours
- C) 9 hours
- D) None of these
Correct Answer: 5 hours
Explanation: Under the EOL scheme, BTPN tank wagons are allotted a strict 5-hour window for unloading to ensure high loco and wagon turnaround[cite: 3502, 3503, 3521].
Q7. Premium Examination' pattern pertains to?
- A) Freight Traffic
- B) Passenger Traffic
- C) Parcel Traffic
- D) All the given options
Correct Answer: Freight Traffic
Explanation: Premium Examination is a maintenance pattern specifically designed for high-utilization freight rakes.
Q8. Under which section of the Railways Act, 1989, accidents are reportable to CRS?
- A) Section 111
- B) Section 112
- C) Section 113
- D) Section 114
Correct Answer: Section 113
Explanation: Section 113 of the Railways Act mandates that serious accidents involving loss of life or grievous injury must be reported to the CRS.
Q9. In case of double exit siding target time for turning out the Medical Van is-
- A) 25 Minutes
- B) 15 Minutes
- C) 35 Minutes
- D) 30 Minutes
Correct Answer: Deleted
Explanation: This question regarding accident relief medical van timing was removed from the official key. [cite: 33, 43]
Q10. What does RTIS stands for?
- A) Right Time Train Information System
- B) Real Time Train Information System
- C) Real Time Terminal Information System
- D) None of the given options
Correct Answer: Real Time Train Information System
Explanation: RTIS uses satellite tracking to provide accurate, live updates on train location and speed to control offices.
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