Why should a worker working in a noisy environment of high intensity be placed on short roasters?     To avoid ear damage     To make the worker happy     To enable him go for smoking     To allow the worker to see his family any time.

Q: Explain the operation of Thermal system with neat diagram

A: Required :- Operation of the thermal system

Q: a) Why should check-valves be fitted to gas welding torches? b) Why should fuel tanks be…

A: (a) Check valves are used as to prevent gasses from mixing upstream of them. As, when a flammable…

Q: Explain the two main dangers from oxygen cylinders and what causes them. b) Why is cleanliness very…

A: Hazards from oxygenOxygen gas in cylinders is used by many people at work and sometimes at home.It…

Q: A technician is inspecting a vehicle and finds the upper radiator hose is collapsed, and the cooling…

A: Given :-  A technician is inspecting a vehicle and finds the upper radiator hose is collapsed, and…

Q: Two techs are discussing oil coolers. Technician A says that when inspecting oil- to-water type…

A: Solution:

Q: What is the challenge and solution of natural gas compressor

A: Given Natural gas compressor To find Challenges and solution

Q: Which of the following is NOT the all air system?

A: To find :-  Correct option

Q: the tip of the inner cone is the location of the maximum temperature in a neutral oxyacetylene…

A: Solution:   The Correct Option with necessary explanation is given below:

Q: Why does a turbine blade which breaks during the operation of an aeroengine need to be contained…

A: During the operation of aerodynamics there is very high speed in very very high altitude. If the…

Q: Why is it unsafe to carry butane lighters or matches inyour pockets while welding?

A: Because welding cylinders quickly catch fire, one should take care not to use butane lighters when…

Q: It prevent knocking because fuel with greater octane number has lower flame speed  True False

A: It prevent knocking because fuel with greater octane number has lower flame speed  True False

Q: The device that receives heat energy from source and that rejects heat into sink is known as a. Heat…

A: The device that receives heat energy from source and that rejects heat into sink is known as a. Heat…

Q: The optimum effective temperature for human comfort is ?

A: For a human being,

Q: In general, steel produced by the Basic Oxygen Furnace is of a better quality than the one produced…

A: Basic Oxygen Furnace It is a pear-shaped structure with a closed bottom and an open top. It is used…

Q: What would operating an engine with 100% water in the cooling system cause? Select one: a. Corrosion…

A:

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.