Try the multiple choice questions below to test your knowledge of Chapter 1. Once you have completed the test, click on 'Submit Answers for Grading' to get your results.

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This activity contains 10 questions.

	Which one of the following is a fully correct statement?   Combustion is an exothermic redox reaction. Redox reactions are those that involve the complete transfer of electrons from one chemical species to another. The chemical species that gains electrons is known as the reductant or reducing agent. Combustion is an exothermic redox reaction. Redox reactions are those that involve the complete transfer of electrons from one chemical species to another. The chemical species that loses electrons is known as the oxidant or oxidising agent. Combustion is an endothermic redox reaction. Redox reactions are those that involve the complete transfer of electrons from one chemical species to another. The chemical species that gains electrons is known as the oxidant or oxidising agent. Combustion is an exothermic redox reaction. Redox reactions are those that involve the complete transfer of electrons from one chemical species to another. The chemical species that gains electrons is known as the oxidant or oxidising agent.

	Which of the following is not true?   Well-ventilated char that is undergoing smouldering combustion can produce small flames. Given sufficient time and enough ventilation, a smouldering fire will always convert into a full flaming, char-producing fire. A flammable material that is used to facilitate and/or increase the rate of spread of fire and/or increase the intensity of fire in known as a fire accelerant. In conventional fires, the flammable gas that is necessary for the presence of flames may arise from the pyrolysis of a sold fuel.

	Which of the following describes the phenomenon known as flashover?   The involvement in a fire, over a very short time span, of essentially all of the fuel items in a room or similar compartment as radiation from hot gases present in the upper parts of the compartment causes ignition of the exposed surfaces of fuel items. The ignition of, and rapid spread of flame within, the hot gases that have accumulated in, or are venting from, the upper part of a burning room or similar compartment. An explosion that occurs during a fire when fresh air is suddenly allowed to mix with air in a compartment that is both oxygen-depleted and rich in flammable, volatile pyrolysis products. The falling of burning materials during a fire, thereby producing secondary ignition at low elevation.

	Which of the following describes the phenomenon known as flashback?   The involvement in a fire, over a very short time span, of essentially all of the fuel items in a room or similar compartment as radiation from hot gases present in the upper parts of the compartment causes ignition of the exposed surfaces of fuel items. The ignition of, and rapid spread of flame within, the hot gases that have accumulated in, or are venting from, the upper part of a burning room or similar compartment. An explosion that occurs during a fire when fresh air is suddenly allowed to mix with air in a compartment that is both oxygen-depleted and rich in flammable, volatile pyrolysis products. The falling of burning materials during a fire, thereby producing secondary ignition at low elevation.

	Which of the following describes the phenomenon known as flameover?   The involvement in a fire, over a very short time span, of essentially all of the fuel items in a room or similar compartment as radiation from hot gases present in the upper parts of the compartment causes ignition of the exposed surfaces of fuel items. The ignition of, and rapid spread of flame within, the hot gases that have accumulated in, or are venting from, the upper part of a burning room or similar compartment. An explosion that occurs during a fire when fresh air is suddenly allowed to mix with air in a compartment that is both oxygen-depleted and rich in flammable, volatile pyrolysis products. The falling of burning materials during a fire, thereby producing secondary ignition at low elevation.

	Which of the following is not true?   In some cases, the nature of the motive of an arsonist will help shape his or her modus operandi. The presence of dropdowns is an indicator of arson. Arsonists may create fires with multiple seats. In cases of arson, trailers may be used to spread fire from one location to another.

	Read the following statements and then decide which of the answers is correct. (i) During fire scene investigations, indicators of the intensity of destruction –such as char depth measurements – can be of significant value in establishing the location of the seat of the fire. (ii) Factors such as the degree of ventilation, fuel loading and fire-fighting activities can have a significant impact on the intensity of destruction that is wrought at any one location within a given fire scene.   Both statement (i) and statement (ii) are true. Statement (i) is false but statement (ii) is true. Statement (i) is true but statement (ii) is false. Both statement (i) and statement (ii) are false.

	The act, omission or defect that allowed the conditions necessary for the ignition of the fire to occur and the fire to be started is known as:   the cause of the fire. fire setting. the seat of the fire. arson.

	Under most circumstances, the most efficient mechanism for the transfer of heat from burning fuel to fuel that is yet to ignite is:   conduction. convection. radiation. none of the above.

	The main technique used to analyse samples suspected of containing liquid fire accelerants is:   atomic absorption spectroscopy. gas chromatography. ultraviolet-visible spectroscopy. X-ray diffraction.

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