Unit 6 - Practice Quiz

An earthquake is a natural event caused by the movement of tectonic plates. The other options are caused by human activities and are classified as man-made disasters.

Building fires, especially those caused by human error or technical faults like a short circuit, are classified as man-made disasters. The other options are natural phenomena.

The main objective of disaster management is to reduce the negative consequences of disasters, which includes saving lives and protecting property through preparedness, response, and recovery efforts.

A seismograph is the scientific instrument used to detect and record the ground motion caused by earthquakes. A barometer measures air pressure, a thermometer measures temperature, and an anemometer measures wind speed.

A flood is defined as an inundation of land that is not normally covered by water. It is a common natural disaster.

NDMA stands for the National Disaster Management Authority, which is the apex body for disaster management in India.

A drought is a disaster characterized by a lack of precipitation over an extended period, resulting in a water shortage.

Over-speeding is a major human error that significantly increases the risk of road accidents. The other options are measures to prevent accidents.

The local community, including neighbors and community-based organizations, are almost always the first to respond in any disaster situation before outside help can arrive.

Cyclones (also known as hurricanes or typhoons in other parts of the world) are large-scale, rotating storm systems with high-speed winds that originate over tropical or subtropical waters.

Preparedness involves planning, training, and educational activities for events that cannot be mitigated. It is a key pre-disaster activity. Response and Recovery happen during and after the event.

A landslide is a geological phenomenon that includes a wide range of ground movements, such as rockfalls and debris flows, down a slope.

The Bhopal Gas Tragedy in 1984 involved the release of a highly toxic gas (Methyl Isocyanate) from a pesticide plant, making it a classic and devastating example of a chemical disaster.

The Sendai Framework for Disaster Risk Reduction (2015-2030) is an international document adopted by UN member states to guide efforts in reducing disaster risks and losses.

Molten rock is called magma when it is beneath the Earth's surface. Once it erupts from a volcano and flows onto the surface, it is called lava.

The Prime Minister of India is the ex-officio chairperson of the NDMA, highlighting the high level of importance given to disaster management in the country's governance structure.

A pandemic is a type of biological disaster defined as an epidemic of an infectious disease that has spread across a very large region, affecting a substantial number of people globally.

The media plays a crucial role in disaster management by providing the public with timely warnings, safety instructions, and accurate updates, which helps in reducing risk and coordinating relief efforts.

An avalanche is specifically defined as a rapid flow of snow, often mixed with ice and debris, down a mountainside or slope.

Mitigation refers to the actions taken to eliminate or reduce the long-term risk to human life and property from hazards. Examples include building earthquake-resistant structures or enforcing zoning laws.

Non-structural measures focus on policies, awareness, and land use to reduce risk without building physical structures. Floodplain zoning is a classic example, as it keeps people and property away from high-risk areas. The other options (levees, dredging, dams) are all structural measures involving physical construction.

In most modern buildings, structural collapse is less common than the falling of non-structural items like ceilings, light fixtures, furniture, and objects from shelves. The 'Cover' step specifically aims to protect the head and neck from these falling hazards, which are the leading cause of injury and death during an earthquake.

The Disaster Management Act, 2005, establishes the National Disaster Management Authority (NDMA) as the apex body for disaster management in India, with the Prime Minister of India as its ex-officio chairperson. This high-level leadership signifies the importance given to disaster management in the country.

Chlorine gas is about 2.5 times heavier than air, so it tends to accumulate in low-lying areas. The correct 'shelter-in-place' procedure for a heavy gas leak is to go to a higher floor to avoid the densest concentration of the gas, seal the room, and turn off all ventilation.

Priority 4 of the Sendai Framework directly addresses the post-disaster phase. The concept of 'Build Back Better' means that reconstruction after a disaster should not just restore what was lost, but should also incorporate disaster risk reduction measures to make the community more resilient to future events.

The District Collector/Magistrate is the focal point for disaster management at the district level. They are the chairperson of the DDMA and are responsible for coordinating the actions of all government agencies and departments involved in disaster response and relief within the district.

CBOs are embedded within the community, giving them unparalleled local knowledge (e.g., who is most vulnerable, safe evacuation routes). They can mobilize local volunteers instantly, making them the true first responders long before government or international aid can reach the affected area.

Agricultural drought specifically refers to a deficit in soil moisture, which directly affects crop growth. It occurs after a meteorological drought (lack of rainfall) but before a hydrological drought (depletion of surface/subsurface water supplies like reservoirs and groundwater) becomes severe.

A fire requires three elements: heat, oxygen, and fuel (the 'fire triangle'). A firebreak works by removing the fuel (trees, shrubs, grass) from a wide area. When the fire reaches this cleared line, it has nothing to burn and cannot cross, effectively containing it.

The NDRF is a dedicated fund for meeting the immediate expenses related to disaster response and relief. It is used when a disaster is of such severity that a state's own resources (from the State Disaster Response Fund) are insufficient. It is not primarily for mitigation projects or salaries, which are budgeted separately.

Excavating the base (or 'toe') of a slope removes its natural support, making the entire slope unstable. This is a common cause of human-induced landslides, as the over-steepened slope can easily fail, especially when saturated with rainwater. The other options are mitigation measures that help stabilize slopes.

Unlike most natural or chemical disasters, biological disasters involve a propagating agent (like a virus or bacterium). Therefore, a primary management strategy is to break the chain of transmission through public health measures like quarantine (for exposed individuals) and isolation (for sick individuals), which are not central to managing earthquakes or floods.

The Mitigation/Prevention phase involves actions taken to eliminate or reduce the long-term risk to human life and property from hazards. Early warning systems, structural measures like building codes, and non-structural measures like awareness campaigns are all proactive steps taken before a disaster strikes to lessen its potential impact.

The storm surge is often the most destructive element of a cyclone. It is not a wave, but a large dome of water pushed towards the shore by the force of the winds. This rise in sea level, combined with normal tides, can inundate coastal areas with several meters of water.

The 'Golden Hour' is a critical time window for medical intervention after a severe injury. It is recognized that a patient's chances of survival are greatest if they receive definitive care within this first hour, making rapid response and transport to a hospital extremely important.

While many organizations can provide relief, the Armed Forces possess unique assets like helicopters, transport aircraft, and robust communication systems. Their ability to establish air-bridges, transport heavy equipment, and reach cut-off areas quickly is a critical logistical capability that is often unmatched by civilian agencies.

One of the most common and dangerous radioisotopes released in a nuclear accident is Iodine-131. The thyroid gland naturally absorbs iodine. By taking potassium iodide (a stable, non-radioactive salt), a person's thyroid becomes 'full' of safe iodine, which prevents it from taking up the harmful radioactive version, thus reducing the risk of thyroid cancer.

Vulnerable populations often lack access to air conditioning or even safe shelter. Public cooling centers provide a direct, life-saving intervention by offering a cool space, hydration, and medical monitoring during the hottest parts of the day. While other options are useful, cooling centers offer the most immediate and targeted relief for those at highest risk.

By spacing out, the group distributes its weight over a larger area, reducing the stress on the snowpack and making it less likely to trigger an avalanche. More importantly, if an avalanche does occur, spacing ensures that only one or two members are caught, leaving the others safe and able to mount an immediate rescue.

In the pre-disaster phase, the media's primary role is proactive: educating the public about risks and spreading official warnings. After a disaster, its role becomes reactive and investigative: informing the public about the extent of the damage, coordinating relief information, and acting as a 'watchdog' to ensure the response is effective and equitable.

This is a key distinction. The NCMC, chaired by the Cabinet Secretary (the country's top bureaucrat), is the primary body for operational coordination at the national level during a severe disaster. The NEC, chaired by the Union Home Secretary, has a broader mandate under the DM Act, 2005, including preparing the National Plan, monitoring its implementation, and providing information to the NDMA, but the NCMC handles the immediate, high-level operational command for severe calamities.

While a state submits a memorandum, the crucial verification step is the visit and report of the IMCT. This team, comprising representatives from various central ministries, conducts a field assessment of the damages. Its report is the primary technical input considered by the Sub-Committee of the National Executive Committee and subsequently the HLC (chaired by the Home Minister) to approve the quantum of relief from the NDRF.

Priority 3 of the Sendai Framework focuses on structural and non-structural measures to enhance resilience. Retrofitting critical infrastructure is a prime example of a structural measure that involves direct financial investment to reduce existing risk and prevent future losses. The other options relate more to Priority 1 (Understanding risk), Priority 2 (Strengthening governance), and Priority 4 (Enhancing preparedness).

A 'soft storey' has less stiffness and strength compared to the floors above it. During an earthquake, lateral forces are concentrated on the more flexible ground floor columns, which are unable to resist the shear forces, leading to their catastrophic failure. This causes the upper, more rigid block of the building to collapse vertically onto the ground floor, a phenomenon known as 'pancaking'.

Ammonia is extremely soluble in water (a property known as high aqueous solubility). Water curtains or fog nozzles create a fine mist with a large surface area that effectively 'scrubs' the ammonia from the air, dissolving it and bringing it to the ground, thereby preventing the toxic plume from reaching the community. The other options are flawed: evacuating to lower ground is wrong for a lighter-than-air gas, fans may not be effective for a large plume, and releasing acid is impractical and dangerous.

A core principle of the Sphere Project is that assistance must be provided in a way that respects the dignity of the recipients. This includes being culturally and socially appropriate. Providing food that is rejected due to cultural unfamiliarity, even if nutritionally sound, fails to meet the needs of the affected population respectfully and effectively, thus violating their right to life with dignity.

A GLOF is specifically characterized by the failure of a natural dam, typically a moraine (an accumulation of glacial debris) or ice, that impounds a glacial lake. This breach releases a massive volume of water and debris suddenly, creating a devastating flood. While a jökulhlaup is similar, it's specifically caused by subglacial volcanic activity. Cloudbursts cause flash floods, but not from a glacial lake.

The thyroid gland readily absorbs iodine. By ingesting a high dose of stable (non-radioactive) potassium iodide, the thyroid becomes saturated. When radioactive Iodine-131 enters the body, the already-full thyroid gland cannot absorb it, and it is excreted harmlessly. This must be done shortly before or after exposure to be effective. Evacuation is also crucial, but KI is the specific medical countermeasure for I-131 exposure.

The IRS is built on the principle of Unity of Command and is agency-driven. The first responder agency on the scene assumes command. In a building fire, the Fire Services are the primary response agency with the technical expertise. Therefore, their senior-most officer on the scene would become the Incident Commander, responsible for managing the incident and coordinating all other supporting agencies until the incident is resolved or command is transferred.

Hydrological drought is concerned with the effects of precipitation shortfall on surface and subsurface water supplies (e.g., rivers, reservoirs, groundwater). Crucially, it manifests with a significant time lag after a meteorological drought begins because it takes time for water bodies to deplete. It can also persist for months or even years after normal rainfall returns, as it takes a long time to replenish these systems.

Disaster risk is understood as a function of the hazard's intensity, the vulnerability of the exposed elements, and the capacity of the system to cope. Risk increases with stronger hazards and higher vulnerability. Conversely, higher capacity (e.g., good early warning systems, strong infrastructure, trained responders) reduces the overall risk. Therefore, capacity is the denominator, mitigating the combined effect of hazard and vulnerability.

Crown fires are the most intense and destructive. They burn through the top layer of foliage on a tree (the canopy or crown). Their immense speed, intense heat, and ability to jump firebreaks by spotting (carrying embers far ahead) make them extremely difficult and dangerous for firefighters to suppress directly. They often require indirect attack methods or a change in weather to be controlled.

This option represents true empowerment. PRA methods treat community members as experts of their own environment. By having them actively map their own vulnerabilities (e.g., households of elderly or disabled people) and capacities (e.g., locations of tube wells, strong buildings), the process builds local ownership, utilizes indigenous knowledge, and ensures the resulting plan is relevant and sustainable, which is the core of CBDM.

Storm surge is primarily a function of the cyclone's intensity (related to low pressure and high wind speeds), the shape of the seafloor (a wide, shallow shelf amplifies the surge), the angle of approach, and the local tides. The central pressure deficit is a key indicator of intensity; a lower pressure creates a 'dome' of water. Ambient air temperature at the exact moment of landfall has a negligible direct effect on the surge height compared to these other powerful hydrodynamic and meteorological factors.

The Act emphasizes a consultative and participatory approach. Section 31(3) of the DM Act, 2005, explicitly states that the District Plan shall be prepared after consultation with local authorities and having due regard to the National Plan and the State Plan. This process of consultation with local bodies (horizontal integration) and alignment with state/national plans (vertical integration) is a key procedural requirement for its validity and effectiveness.

To ensure that the CRS can conduct independent and unbiased inquiries into railway accidents without any conflict of interest, it is placed under the administrative control of the Ministry of Civil Aviation. This separation from the Ministry of Railways, which is responsible for running the trains, is a crucial institutional safeguard for impartiality.

Debris flows (or mudflows) are characterized by their high water content, which transforms the material into a viscous slurry. This allows them to travel at very high speeds (often >35 mph) and for long distances down steep channels, carrying immense energy. Their consistency allows them to destroy or bury everything in their path, making them far more lethal than slower-moving slides.

This point emphasizes the need for a scientific understanding of risk. By investing in global risk mapping, countries can share data, technology (like GIS and remote sensing), and best practices. This leads to more accurate and granular hazard, vulnerability, and risk (HVR) maps, which are the foundational tools for effective disaster mitigation, from enforcing building codes in the right places to planning resilient infrastructure and early warning systems.

While the DM Act 2005 provides the overall framework, the specific legal basis for requisitioning troops and the operational relationship on the ground (where the military acts under the authority of the civil magistrate) is traditionally derived from provisions within the CrPC. The armed forces remain in aid of the civil authority, not in command of it. The DM Act does not give the NDMA chairperson direct operational command over troops.

A deliberate release, especially of an aerosolized agent like Anthrax, can expose a large number of people at once. Unlike a natural epidemic that typically starts small and grows, a bioterrorism event can lead to a massive, synchronized wave of casualties. This 'point source' outbreak puts immediate, catastrophic pressure on the public health and hospital systems, a key feature that response plans must account for. Inhalational Anthrax is also not transmitted from person to person.