Power Engineering Technology Quiz

When the pressure in the safety valve exceeds a certain threshold, the spring inside the valve will lift off the seat. This is because the spring is designed to release excess pressure and prevent any potential damage or explosion. Therefore, the statement "When the pressure in the safety valve is too high, the spring will lift off the seat" is true.

The leading Supervisor is responsible for the recovery of a worker who is injured on the job upon returning to the workplace. This is because the leading Supervisor is typically in charge of overseeing the safety and well-being of the workers, and is responsible for ensuring that appropriate measures are taken to support the injured worker's recovery and reintegration into the workplace.

To achieve complete combustion, two conditions must be met: enough air must be supplied and enough time must be given. Sufficient air is necessary to provide the oxygen required for the combustion process. Without enough air, incomplete combustion may occur, leading to the formation of harmful byproducts such as carbon monoxide. Additionally, enough time is needed to allow for the complete oxidation of the fuel. If the combustion process is rushed, there may not be enough time for all the fuel molecules to react with the oxygen, resulting in incomplete combustion.

The correct answer is Compressed Gas. The symbol for Compressed Gas typically features a gas cylinder, indicating that the hazard is associated with pressurized gas containers. This symbol is used to identify substances that are stored under high pressure and can potentially explode or cause other hazards if mishandled. Flammable & Combustible, Poisonous & Infectious, and Biohazardous & Infectious symbols represent different types of hazards and are not specifically associated with gas tanks.

Chemicals are supplied to the boiler water through a displacement motor-driven pump. This type of pump uses a mechanical mechanism to displace the chemicals and deliver them to the boiler water. It is a reliable and efficient method of supplying chemicals, ensuring that the correct amount is delivered consistently. Other options such as mechanical declaration, filtration, pressure filters, and water softening are not directly related to the supply of chemicals to the boiler water.

Water is mixed with Sulphur dioxide (SO2) in order to produce an acid or an acidic substance. When water reacts with SO2, it forms sulfurous acid (H2SO3), which is a weak acid. This reaction occurs when SO2 dissolves in water, and it is an important step in the formation of acid rain. Therefore, water is the correct answer in this case.

Boiler Feedwater should be alkaline and be kept at a pH value of 10.5. This is because alkaline water helps to prevent corrosion in the boiler system and maintain its efficiency. A pH value of 10.5 is considered to be within the optimal range for preventing corrosion and ensuring the longevity of the boiler. Acidic water can cause corrosion and damage to the boiler, while a neutral pH may not provide enough protection against corrosion. Therefore, maintaining an alkaline pH of 10.5 is necessary for the safe and efficient operation of the boiler.

The MSDS (Material Safety Data Sheet) is a document that provides information about the potential hazards and safety precautions for a specific chemical or product. It typically includes sections on fire and explosion data, chemical ingredients, and physical data such as boiling point and density. Controlled Product Regulation, on the other hand, refers to a set of regulations governing the classification, labeling, and safety data sheets for hazardous products in Canada. Therefore, Controlled Product Regulation is not a component of the MSDS, but rather a separate regulation that may apply to the product.

The correct answer is "Haycock, 1720". This answer is supported by the fact that the question asks for the name of the first boiler and the year it was made. The option "Haycock" refers to a type of boiler, and "1720" is the corresponding year. This suggests that the Haycock boiler was the first boiler made in the year 1720.