Defence Technology Archives

21. Suppose you are the head of the security unit of an airport and an aer

Suppose you are the head of the security unit of an airport and an aeroplane has been hijacked there. While dealing with the hijackers, what precautions will be taken by you ?

1. Follow the instructions of the flight crew, as they are trained to deal with such contingencies
2. Do not provoke the hijackers in any circumstances
3. Convey to the hijackers that you are a Sky Marshal
4. Do not make eye contact with the hijackers

Select the correct answer using the code given below :

1, 2 and 4 only

1, 3 and 4 only

1, 2, 3 and 4

2 and 3 only

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

The correct answer is A.

Dealing with an aeroplane hijacking requires careful crisis management, prioritizing safety and avoiding provocation, while utilizing the expertise of those involved.

1. While ground forces typically take command, coordination with the flight crew is essential. Flight crew are trained in handling onboard emergencies and have crucial situational awareness of what is happening inside the aircraft. Following their instructions (interpreted as close coordination and valuing their input) is plausible, especially in initial stages or for specific onboard conditions.
2. Not provoking the hijackers is a fundamental principle in any hostage or hijacking situation. Actions should aim to de-escalate tension and minimize risk to those onboard. This is a correct precaution.
3. Conveying to the hijackers that you are a Sky Marshal from the ground is unlikely to be a standard procedure and could potentially complicate the situation or reveal security measures unnecessarily. Sky Marshals operate onboard.
4. Avoiding eye contact can be a tactic used in initial interactions or negotiations to avoid appearing confrontational or challenging, contributing to de-escalation. This is a plausible precaution.

Based on typical crisis management principles in hijacking scenarios, avoiding provocation (2 and 4) and coordinating with key personnel (1) are appropriate measures, while revealing identities like Sky Marshal (3) from the ground is not. Therefore, 1, 2, and 4 are the most likely correct precautions among the options.

Join Our Telegram Channel

22. Suppose you are working as the head of the CISF security unit of an in

Suppose you are working as the head of the CISF security unit of an industrial unit. You are supposed to act against the kidnapping of the Managing Director of the industrial unit. Which of the following will be done by you ?

Join Our Telegram Channel

1. Try to make contact with the kidnappers through informal sources
2. Convey message to the Managing Director that he should not resist at any cost
3. Do not try to be heroic, rather engage the kidnappers in negotiations
4. Always assume that you can reason out with kidnappers and win them over

Select the correct answer using the code given below :

1, 2 and 4 only

1, 2 and 3 only

3 and 4 only

1, 2, 3 and 4

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

The correct answer is B.

Handling a kidnapping requires a strategic approach focused on the safe recovery of the victim, often involving negotiation and intelligence gathering, while avoiding actions that could endanger the victim.

1. Trying to make contact through informal sources can be a valuable way to gather intelligence or initiate indirect communication channels with the kidnappers. This is a plausible step.
2. Advising the victim not to resist is standard protocol in kidnapping scenarios as resistance can provoke violence from the perpetrators, endangering the victim’s life. This is a plausible and important step.
3. Engaging in negotiations rather than immediately attempting a heroic intervention is often preferred to ensure the victim’s safety and explore possibilities for a peaceful resolution. This is a plausible strategy in crisis management.
4. Assuming you can *always* reason out with kidnappers and win them over is unrealistic and dangerous. Kidnappers’ motivations, mental state, and intentions can vary greatly, and they may not be amenable to reason or persuasion. This is a flawed assumption in crisis management.

Therefore, actions 1, 2, and 3 are generally considered appropriate approaches in handling a kidnapping situation, while action 4 is not.

23. Which of the following factors are responsible for the success of warn

Which of the following factors are responsible for the success of warning and detection by a dog ?

1. Ability of the Handler to read his dog
2. Concentration of scent
3. Density of vegetation
4. Condition of fitness of the dog

Select the correct answer using the code given below :

1, 2 and 4 only

2, 3 and 4 only

1 and 3 only

1, 2, 3 and 4

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

The correct answer is D) 1, 2, 3 and 4. All the listed factors are responsible for the success of warning and detection by a dog. The handler’s ability to read the dog’s signals, the concentration of the scent the dog is detecting, the environmental conditions like density of vegetation affecting scent and movement, and the dog’s physical fitness and health all significantly impact its performance in detection and warning tasks.

Successful K9 detection and warning depend on a combination of the dog’s innate abilities and training, the handler’s skill, the specific scent conditions, and the surrounding environment.

A skilled handler is crucial for interpreting subtle changes in the dog’s behaviour that indicate a find or warning. Scent concentration affects how easily and quickly the dog can locate the source. Vegetation density can disperse scent, obstruct the dog’s path, or hide the target. A dog’s fitness ensures it has the stamina and focus required for prolonged search or patrol duties.

Join Our Telegram Channel

24. Which of the following is/are most relevant for surveillance ? 1. C

Which of the following is/are most relevant for surveillance ?

1. CCTV
2. Key control
3. Access control

Select the correct answer using the code given below :

1 and 2 only

2 and 3 only

1, 2 and 3

1 only

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

The correct answer is D) 1 only. Surveillance involves monitoring activities. CCTV (Closed-Circuit Television) is a direct and primary tool for visual surveillance. Key control and access control are measures to manage who can enter specific areas; they are part of overall security and access management but are not forms of surveillance themselves, which focuses on observation and monitoring of behaviour or events.

Surveillance is the act of observing or monitoring. CCTV performs this function directly. Access control and key control prevent or restrict access but do not primarily involve observation.

A comprehensive security system often integrates surveillance (like CCTV) with access control (like card readers or key systems) and other measures. However, when distinguishing the primary function, only CCTV from the list is fundamentally a surveillance technology.

Join Our Telegram Channel

25. Which of the following statements about fences is/are correct ? 1.

Which of the following statements about fences is/are correct ?

1. Fences are the first line of protection
2. Fence posts should be placed at least 30 feet apart
3. Anti-climb paints should be used in fences as an additional measure of security

Select the correct answer using the code given below :

Join Our Telegram Channel

1 and 3 only

2 and 3 only

1 only

1, 2 and 3

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

The correct answer is A) 1 and 3 only. Statement 1 is correct as fences serve as the primary physical barrier and the first line of protection in layered security. Statement 3 is correct as anti-climb paints are used as an additional security measure on fences. Statement 2 is incorrect; fence posts are typically placed much closer than 30 feet (usually 8-10 feet apart) for structural integrity and security effectiveness.

Security fences are outer perimeter barriers, and their effectiveness relies on proper construction (including post spacing) and supplementary measures like anti-climb paint.

Standard security fencing involves posts placed relatively close together to maintain tension, stability, and prevent easy distortion or penetration. 30 feet spacing would make the fence highly vulnerable. Anti-climb paints add a deterrent and detection layer to physical barriers.

26. Prior information on which of the following issues is/are essential fo

Prior information on which of the following issues is/are essential for foot patrolling ?

Topography of the area
Population density of the area
Location of the terrorist camps

Select the correct answer using the code given below :

1 and 2 only

2 and 3 only

1 only

1, 2 and 3

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

The correct answer is D) 1, 2 and 3. All three factors – topography, population density, and location of terrorist camps (or potential threat locations) – are essential prior information for effective and safe foot patrolling.

Effective foot patrolling requires comprehensive intelligence about the patrol area to plan routes, assess risks, identify potential threats, and manage interactions with the environment and population.

Topography influences mobility, visibility, and potential cover/concealment. Population density helps in understanding the usual activity levels and identifying anomalies. Knowing the location of potential threats, such as terrorist camps or areas of known criminal activity, is crucial for planning patrol patterns, resource allocation, and ensuring officer safety.

Join Our Telegram Channel

27. The composition, grouping and strength of escorts is determined on the

The composition, grouping and strength of escorts is determined on the basis of :

Nature and size of the convoy to be escorted
Nature of route and terrain to be passed through

Select the correct answer using the code given below :

Join Our Telegram Channel

1 only

2 only

Both 1 and 2

Neither 1 nor 2

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

The composition (types of personnel, vehicles, equipment) and strength (number of personnel, vehicles) of an escort for a convoy are determined by a threat assessment that considers various factors. Two of the most critical factors are:
1. Nature and size of the convoy to be escorted: The value, size, and vulnerability of the convoy dictates the level of protection required. A larger or more valuable convoy requires a stronger escort. The type of goods or personnel being transported also influences the risk.
2. Nature of route and terrain to be passed through: The anticipated threats along the route (e.g., ambush risk, type of enemy forces) and the terrain characteristics (e.g., open vs. restricted, visibility, potential ambush sites) determine the tactics, required mobility, and overall strength needed for the escort to effectively counter threats and ensure safe passage.

– Escort planning considers the asset being protected and the environment it traverses.
– Both the convoy’s characteristics and the route’s characteristics are essential factors.

Other factors that influence escort planning include the overall security situation in the area, available resources, time constraints, and rules of engagement. However, the nature of the convoy and the route/terrain are primary determinants of the escort’s configuration.

28. What are the likely places of putting anti-vehicle mines ? In rocky

What are the likely places of putting anti-vehicle mines ?

In rocky areas
On tracks running along a river
On roads, where water has accumulated

Select the correct answer using the code given below :

2 and 3 only

1 and 2 only

1 and 3 only

1, 2 and 3

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

Anti-vehicle mines are designed to target vehicles and are placed in locations where vehicle movement is anticipated or restricted, making detection and avoidance difficult.
1. In rocky areas: Vehicle movement might be limited to specific trails, making them predictable routes for mining. Rocky terrain can also aid concealment and hinder clearing.
2. On tracks running along a river: Rivers often define mobility corridors. Tracks along rivers are strategic lines of communication where traffic is channeled, presenting ideal targets for mining. Riverine terrain can also complicate clearing operations.
3. On roads, where water has accumulated: Water conceals mines visually and makes detection and clearing more hazardous. Mines designed for underwater use can be effectively employed here to deny or disrupt movement.
All three locations are tactically advantageous for employing anti-vehicle mines.

– Anti-vehicle mines are placed to disrupt enemy movement.
– Locations that channel traffic, offer concealment, or make clearing difficult are preferred.

Mining strategy involves selecting ground that the enemy is likely to use, provides good cover for the minefield, and allows for observation and defense. The listed locations meet these criteria in different ways, exploiting terrain features or environmental conditions to enhance the effectiveness and survivability of the minefield.

Join Our Telegram Channel

29. Consider the following statements: 1. CO₂ should be used to control

Consider the following statements:

1. CO₂ should be used to control ‘B’ type fire
2. Special dry chemicals can be used to control ‘B’ type fire
3. Foam extinguishers are less effective to control ‘B’ type fire
4. Steam of water should be used with caution as it may spread the ‘B’ type fire

Which of the statements given above are not correct ?

Join Our Telegram Channel

2 and 3 only

1 and 2 only

3 and 4 only

None of the above

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

Let’s evaluate each statement regarding ‘B’ type fires (flammable liquids):
1. CO₂ should be used to control ‘B’ type fire: Correct. CO2 extinguishers are effective on Class B fires as they displace oxygen.
2. Special dry chemicals can be used to control ‘B’ type fire: Correct. Dry chemical extinguishers (like BC or ABC) are effective on Class B fires.
3. Foam extinguishers are less effective to control ‘B’ type fire: Incorrect. Foam extinguishers are *highly* effective on Class B fires as they form a blanket to smother the fire and cool the fuel.
4. Steam of water should be used with caution as it may spread the ‘B’ type fire: While applying steam itself isn’t a standard method, applying liquid water to hot liquid fuels causes it to flash to steam, expanding rapidly and potentially spreading the burning liquid through splashing and frothing. So, using water or anything that generates steam requires caution due to the risk of spreading. However, the phrasing “steam of water” and the direct statement that *it* may spread the fire is potentially technically imprecise compared to the mechanism of liquid water causing spreading via steam formation. If interpreted strictly, using *steam* itself might not spread the fire, although it could cause other issues. In the context of standard firefighting practices, applying water in any form that causes significant steam can spread liquid fires. Given that statement 3 is definitively incorrect, statement 4 is also likely considered incorrect in this context, perhaps due to imprecise phrasing or focus on steam rather than the liquid-to-steam conversion effect.

– Foam is highly effective on Class B fires, making statement 3 incorrect.
– Applying water to hot liquid fires causes steam and can spread the fire. Statement 4 might be considered incorrect due to specific phrasing regarding “steam of water”.

Standard firefighting agents for Class B fires include Foam, CO2, and Dry Chemical. Water in a stream is dangerous on most Class B fires. While water fog/mist can sometimes be used on specific Class B fuels (like alcohols), it’s not universally applicable, and the risk of spreading remains a key caution when water interacts with hot liquids. Statement 3 is unequivocally false. Statement 4 is likely deemed incorrect based on a strict interpretation of “steam of water” as an agent or mechanism, rather than the effect of applying liquid water to hot fuel.

30. Match List I with List II and select the correct answer using the code

Match List I with List II and select the correct answer using the code given below the Lists :

List I (Indian Navy Training Institute)	List II (INS)
A. Anti-Submarine Warfare School	1. INS Venduruthy, Kochi
B. NBCD School	2. INS Kunjali, Mumbai
C. Music Training School	3. INS Mandovi, Goa
D. Provost and Physical Training School	4. INS Shivaji, Lonavala

Code :

Join Our Telegram Channel

A-3, B-2, C-4, D-1

A-1, B-4, C-2, D-3

A-3, B-4, C-2, D-1

A-1, B-2, C-4, D-3

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2023

Download PDF Attempt Online

Matching the Indian Navy Training Institutes with their respective locations/INS names:
– Anti-Submarine Warfare School: This school is located at INS Venduruthy in Kochi.
– NBCD School: The Nuclear, Biological, Chemical Defence School is located at INS Shivaji in Lonavala.
– Music Training School: This school is located at INS Kunjali in Mumbai.
– Provost and Physical Training School: This school is located at INS Mandovi in Goa.

– INS Venduruthy is the major base in Kochi that houses several training establishments.
– INS Shivaji in Lonavala is a technical training institute, particularly known for engineering disciplines and NBCD training.
– INS Kunjali is a naval base in Mumbai, home to various units including the Naval Band.
– INS Mandovi is a naval base in Goa, also hosting various training facilities including for Provost and PT.

Therefore, the correct matching is:
A. Anti-Submarine Warfare School – 1. INS Venduruthy, Kochi
B. NBCD School – 4. INS Shivaji, Lonavala
C. Music Training School – 2. INS Kunjali, Mumbai
D. Provost and Physical Training School – 3. INS Mandovi, Goa
This corresponds to option B.