Knowledge Booster: S_T_Signal Edition (07 May 2026)
Welcome to today's S_T_Signal Knowledge Booster! We've handpicked 10 essential questions from our database to help you sharpen your skills. Dive in and test your knowledge!
Q1. In mode charging, O/P of charger is slightly more than the cell voltage. मोड चार्जिंग में, चार्जर का आउटपुट सेल वोल्टेज से थोड़ा अधिक होता है।
- A) Initial
- B) Boost
- C) Float
- D) trickle
Correct Answer: Float
Explanation: Explanation : initial-2.7v boost-2.5
Q2. In a double line class B station, a block section limit board shall be provided ______________. ASTE 70% 2025. डबल लाइन क्लास बी स्टेशन में, ब्लॉक सेक्शन लिमिट बोर्ड उपलब्ध कराया जाएगा ______________। ASTE 70% 2025.
- A) where there are no points in the station
- B) the outer most points are trailing points
- C) shall be located 180 mtrs in advance of the home signal
- D) All the options
Correct Answer: All the options
Explanation: Explanation : (c) The Block section Limit Board or the Shunting Limit Board shall be so (a) At Class 'B' stations worked on Double Line Absolute Block System (with
Q3. Where a Slip Siding is located at the departure end of a Double Line Station, the interlocking shall be such that the Points can be set towards the Block section only when the block instrument is set to_______? जहां डबल लाइन स्टेशन के प्रस्थान छोर पर स्लिप साइडिंग स्थित है, वहां इंटरलॉकिंग इस प्रकार होनी चाहिए कि ब्लॉक इंस्ट्रूमेंट को _______ पर सेट करने पर ही पॉइंट्स को ब्लॉक सेक्शन की ओर सेट किया जा सके?
- A) Line Closed
- B) Train on Line
- C) Line Clear
- D) None of the given options
Correct Answer: Line Clear
Explanation: Explanation : Line Clear
Q4. System Integrity Test shall be carried out once in every _______________. ASTE 70% 2025. सिस्टम इंटीग्रिटी टेस्ट प्रत्येक _______________ में एक बार किया जाएगा। ASTE 70% 2025.
- A) year
- B) five years
- C) two years
- D) five years or earlier if interlocking is altered
Correct Answer: five years or earlier if interlocking is altered
Explanation: Explanation : Indoor & Outdoor signalling equipment for functional working & safety. To be done in a new installation, at every interlocking alteration or periodically once
Q5. For running trains up to 140 kmph the minimum standard of interlocking as per IRSEM to be provided for station is? 140 किमी प्रति घंटे तक की गति से ट्रेनें चलाने के लिए, आईआरएसईएम के अनुसार स्टेशन पर न्यूनतम इंटरलॉकिंग मानक क्या होना चाहिए?
- A) Standard -I
- B) Standard -I I
- C) Standard -I I I
- D) Standard -IV
Correct Answer: Standard -I I I
Explanation: Explanation : ADVANTAGES n Line capacity increases.
Q6. The maximum excitation voltage applied to relays other than QBAT shall be _______________. ASTE 70% 2025. QBAT के अलावा अन्य रिले पर लागू अधिकतम उत्तेजना वोल्टेज _______________ होगा। ASTE 70% 2025.
- A) 250%
- B) 125%
- C) 300%
- D) 200%
Correct Answer: 300%
Explanation: Explanation : of its rated pick up voltage under minimum ballast resistance condition and (a) DC track relays of approved design shall be used. In future installations,
Q7. Emergency point operation due to point track circuit failure shall be done _______________. ASTE 70% 2025. पॉइंट ट्रैक सर्किट की विफलता के कारण आपातकालीन पॉइंट संचालन _______________ किया जाएगा। ASTE 70% 2025.
- A) after line verification at site by traffic personnel
- B) emergency key provided is free
- C) emergency operation shall be recorded in a non-resettable counter
- D) All the options
Correct Answer: All the options
Explanation: Explanation : during track circuit failures. Each such individual operation shall be recorded on a suitable non-resettable Counter.
Q8. Which one of the following descriptions appears on IPS Status Monitoring Panel in ASM Room, when IPS Battery Bank Level is at 70% Depth of Discharge? जब आईपीएस बैटरी बैंक का डिस्चार्ज स्तर 70% होता है, तो एएसएम कक्ष में आईपीएस स्टेटस मॉनिटरिंग पैनल पर निम्नलिखित में से कौन सा विवरण दिखाई देता है?
- A) Start Generator
- B) Emergency Start Generator
- C) System Shut Down
- D) Call S&T Staff
Correct Answer: System Shut Down
Explanation: Explanation : Start Generator -50% DOD -RED Audio/ visual alarm can be acknowledged for audio cut off. Emergency Start Generator - 60% DOD - RED Audio/ visual alarm can be acknowledged for audio cut off.
Q9. In initial charging terminal voltage of cell is set to volt/cell प्रारंभिक चार्जिंग के दौरान सेल का टर्मिनल वोल्टेज वोल्ट/सेल पर सेट किया जाता है।
- A) 2.25 V
- B) 2.3V
- C) 2.4V
- D) 2.7V
Correct Answer: 2.7V
Explanation: Explanation : 2.7 initial charging
Q10. As per IRSEM-2021, for outdoor signalling circuit in 25KVAC RE area, the maximum permissible induced voltage is restricted to "X" for human safety and factor of safety "Y" has been considered. Which one of the followings is correct for the value of "X" & "Y" respectively? आईआरएसईएम-2021 के अनुसार, 25 केवीएसी आरई क्षेत्र में बाहरी सिग्नलिंग सर्किट के लिए, मानव सुरक्षा के लिए अधिकतम अनुमेय प्रेरित वोल्टेज "X" तक सीमित है और सुरक्षा गुणांक "Y" को ध्यान में रखा गया है। निम्नलिखित में से कौन सा "X" और "Y" के मान के लिए सही है?
- A) 95 Volt & 2.5
- B) 115 Volt & 2.5
- C) 230 Volt & 1.5
- D) 400 Volt & 1.5
Correct Answer: 400 Volt & 1.5
Explanation: Explanation : Maximum permissible induced voltage is restricted to 400V for human safety and factor of safety 1.5 has been considered
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