What Does 1 Tonne Tr In Refrigeration Mean *?


Explanation: 1 Tonne Rating (TR) means that the capacity is such that it can convert 1 tonne of water to ice i.e. 0C in 24 hours.



What is Cyaniding?

noun. a process for recovering gold and silver from ores by treatment with a weak solution of sodium cyanide. Also called: cyaniding.


What is STP in Kelvin?

STP stands for Standard Temperature and Pressure. It is defined to be 273 K (0 degrees Celsius) and 1 atm pressure (or 105 Pa).


What is pack carburizing?

The earliest method of case hardening, in which components were packed into a suitable box, together with carbon-bearing materials such as charcoal, hooves, hide, animal fat and horn, and heated to the carburising temperature.


What kind of carbon rich material is used in the carburizing mixture?

What kind of carbon-rich material is used in the carburizing mixture? Explanation: The carburizing mixture contains a carbon-rich material like charcoal or charred leather, along with an energizer. The energizer is composed of sodium carbonate (soda ash) and barium carbonate.


What is the difference between case hardening and carburizing?

Case hardening is the process of hardening just the surface of the part. It is also known as carburizing. In the carburizing process, the low carbon component is placed in a furnace which contains a carefully controlled carbon atmosphere.


Is carburization temperature dependent?

The increased carbon levels also lead to loss of ductility, which can lead to various forms of fracture. The carburization rate of an alloy is affected by alloy composition, exposure gas composition, temperature, and time.


What is carburising in heat treatment?

Carburizing is a case hardening process in which a metal part or component of low carbon content is heated in a carbon-rich gas atmosphere. The process of heating the metal component in a high carbon environment allows for diffusion of carbon atoms directly into the surface of the part that needs to be case hardened.


Which of the following can be used for measuring temperature Mcq?

Which of the following can be used for measuring temperature? Explanation: Fluid expansion system is a method for measuring temperature, in which expansion of liquid is measured with temperature. Explanation: IPTS is the short form of name International Standard Temperature Scale.


What is the refrigerant number of water Mcq?

R-118


What is the temperature of carburizing?

870 to 940 ÂșC


What is SL unit of refrigeration?

The SI unit is watt (W). Another unit common in non-metric regions or sectors is the ton of refrigeration, which describes the amount of water at freezing temperature that can be frozen in 24 hours, equivalent to 3.5 kW or 12,000 BTU/h.


What is the difference between gas carburizing and pack carburizing?

Gas carburizing is theoretically similar to pack carburizing aside from the supply of carbon monoxide gas to the heated furnace and the carbon decomposition. Many of the problems with pack carburizing are eliminated in this process. The carbon monoxide gas needs to be contained safely.


What is a temperature sensor used for?

A temperature sensor is a device used to measure temperature. This can be air temperature, liquid temperature or the temperature of solid matter. There are different types of temperature sensors available and they each use different technologies and principles to take the temperature measurement.


What is a gas carburizing process discuss with neat sketches in brief?

Gas Carburising Process is a surface chemistry process, which improves the case depth hardness of a component by diffusing carbon into the surface layer to improve wear and fatigue resistance.


What is gas carburizing?

Carburizing is a heat treating process in which iron or steel absorbs carbon liberated when the metal is heated in a carbon enriched atmosphere. The process leads to a hardening of the metal which allows the product to be used in a wider variety of outputs due to the increased hardness.


What are the three types of carburizing?

There are three types of carburising commonly used:

  • gas carburising.
  • liquid carburising (or cyaniding)
  • solid (pack) carburising.


What are the basic differences between Cyaniding and nitriding?

The key difference between cyaniding and carbonitriding is that cyaniding uses sodium cyanide liquid, whereas carbonitriding process uses a gaseous atmosphere consisting of ammonia and hydrocarbons.


What is the value of 110 C on the Fahrenheit scale Mcq?

What is the value of 110 C on the Fahrenheit scale? F = 230 F.


Why BaCO3 is added in solid Carburizer?

"Carburizing process is often done to harden the surface of the gear and the cam or cam (Malau, V., 1999)". To accelerate the penetration of carbon into the specimen during pengarbonan process, it is necessary to add other elements such as BaCO3, NaCO3 and others.


What are two methods of case carburizing?

Most carburizing is done by heating components in either a pit furnace, or sealed atmosphere furnace, and introducing carburizing gases at temperature.


Dated : 31-May-2022

Category : Education

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