F-Gas English Low GWP
Všetky otázky
HFC | Flammable | CO₂ | NH₃
Ľahké otázky |
Stredne ťažké otázky |
Ťažké otázky
1
Ľahká
What is the base unit of mass according to the International System of Units (Système International d’Unités)?
| Pound |
| kg |
| N |
| t |
2
Ľahká
What does the GWP indicator mean?
| This is an indicator expressing the potential to deplete the ozone layer. |
| It is a unit expressing the ability to enhance the ozone layer. |
| It is the global warming potential. The impact on global warming caused by 1 kg of a given gas or chemical substance, expressed as a GWP value, where GWP=1 represents the global warming caused by 1 kg of CO₂ over a period of 100 years (the global warming potential of a unit mass of a given gas over a 100-year period, relative to the warming caused by a unit mass of CO₂). |
| It is an expansion of the abbreviation ‘Global Warming Potential’ and indicates the rate of increase in air temperature |
3
Ľahká
What is the main function of a relief valve?
| Relieves pressure in the system in the event of excessive pressure |
| Prevents the evaporator from freezing |
| It controls the oil level in the compressor |
| It monitors the moisture content of the refrigerant |
4
Ľahká
What is the base unit of pressure according to the International System of Units (SI)?
| Psi |
| bar |
| Pa |
| Atm. |
5
Ľahká
What is superheat?
| It is the amount of heat required to cause the vapour formed from a liquid to become superheated. |
| It is the amount of heat required to heat a liquid. |
| It is the amount of heat required to turn a liquid into vapour. |
| It is the amount of heat required to increase the pressure. |
6
Ľahká
What is the compressor’s compression ratio?
| It is the ratio of the suction pressure to the discharge pressure of the compressor (po/pk). |
| It is the ratio of the discharge pressure to the suction pressure of the compressor (pk/po). |
| It is the amount of refrigerant that will be compressed in a single compressor cycle relative to the heat capacity. |
| It is the ratio of the discharge pressure to the effective capacity of the compressor (p/Vk). |
7
Ľahká
What is the theoretical displacement of a compressor?
| The displacement capacity of a compressor is expressed by the coefficient of performance (COP) |
| This is the volume of refrigerant that flows through a reciprocating compressor during a single piston cycle. |
| It is the volume of refrigerant delivered by a reciprocating compressor per unit of time, usually referred to by the manufacturer as the displacement. It depends on the compressor’s geometric dimensions and rotational speed. |
| The displacement of a compressor is determined by the dimensions of the cylinder – its volume (cm³) |
8
Ľahká
What is the dead volume of a compressor?
| It is the space between the valve plate and the top of the piston. |
| This is the space between the side surface of the piston and the cylinder. |
| It is the space between the valve plate and the bottom dead centre of the piston. |
| This is the space between the bottom of the piston and the crankshaft cover. |