Firefighters are often asked to speak to school and community groups about the importance of fire safety, particularly fire prevention and detection. Because smoke detectors reduce the risk of dying in a fire by half, firefighters often provide audiences with information on how to install these protective devices in their homes. Specially, they tell them these things: A smoke detector should be placed on each floor of a home. While sleeping people are in particular danger of an emergent fire, and there must be a detector outside each sleeping area. A good site for a detector would be a hallway that runs between living spaces and bedrooms. Because of the dead-air space that might be missed by turbulent hot air bouncing around above a fire, smoke detectors should be installed either on the ceiling at least four inches from the nearest wall, or high on a wall at least four, but no further than twelve inches from the ceiling. Detectors should not be mounted near windows, exterior doors, or other places where drafts might direct the smoke away from the unit. Nor should they be placed in kitchens and garages, where cooking and gas fumes are likely to cause false alarms.
The passage states that, compared with people who do not have smoke detectors, persons who live in homes with smoke detectors have a
50% better chance of surviving a fire.
The correct answer is a 50% better chance of surviving a fire.
The passage explicitly states that smoke detectors cut the risk of dying in a home fire roughly in half, meaning residents of homes with working smoke detectors have approximately a 50% better chance of surviving a fire compared to those without detectors.
The claim about a 50% better chance of preventing a fire is incorrect — smoke detectors detect fires, they do not prevent them from starting.
The claim about a 75% chance of detecting a hidden fire introduces a figure not stated in the passage.
The claim about a 100% better chance of avoiding injury also introduces a figure the passage does not make — the stated benefit relates specifically to survival, not to complete injury prevention.
Similar Questions
The passage indicates that one of the responsibilities of a firefighter is to.
A smoke detector should not be installed near a window because
A smoke detector must always be placed
Subliminal communication is part of.
What is the main focus of this passage?
The relation between democracy and development can be seen through their
The central theme of the passage is:
The interpretation of democracy depends upon
Development should be comprehensively measured in terms of
The consequential analysis of democracy as related to development should take into account
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A sphere of volume V is made of a material with lower density than water. While on Earth, it floats on water with its volume f1V (f1 < 1) submerged. On the other hand, on a spaceship accelerating with acceleration a < g (g is the acceleration due to gravity on Earth) in outer space, its submerged volume in water is f2V. Then:
A railway wagon (open at the top) of mass M1 is moving with speed v1 along a straight track. As a result of rain, after some time it gets partially filled with water so that the mass of the wagon becomes M2 and speed becomes v2. Taking the rain to be falling vertically and the water stationery inside the wagon, the relation between the two speeds v1 and v2 is :
Consider the following statements:
1. Distance between the longitudes becomes zero on North Pole and South Pole.
2. Distance between the longitudes is maximum on the Equator.
3. Number of longitudes is more than number of latitudes.
Which of the statements given above is/are correct?
One block of 2⋅0 kg mass is placed on top of another block of 3⋅0 kg mass. The coefficient of static friction between the two blocks is 0⋅2. The bottom block is pulled with a horizontal force F such that both the blocks move together without slipping. Taking acceleration due to gravity as 10 m/s2, the maximum value of the frictional force is :
