F-Gas English Low GWP
Všetky otázky
HFC | Flammable | CO₂ | NH₃
Ľahké otázky |
Stredne ťažké otázky |
Ťažké otázky
1
Ľahká
What is the requirement regarding the labelling of an installation containing a flammable substance?
| Colour-coding of pipes is sufficient |
| Labelling is not required for hermetically sealed systems |
| Labelling is required only in technical rooms |
| The labelling must indicate the type of substance and the flammability hazard |
2
Ľahká
What are the potential consequences of using unsuitable connections in a system containing a flammable substance?
| No impact on safety |
| Merely installation difficulties |
| Merely a reduction in efficiency |
| Risk of leakage and the formation of an explosive mixture |
3
Ľahká
How should an employee respond when a gas alarm is triggered?
| Switch off the system and wait for the alarm to stop |
| Carry on working until they see a leak |
| Reduce the pressure in the system |
| Leave the room immediately and notify their supervisor |
4
Ľahká
Gas detectors should be installed in rooms where:
| The amount of refrigerant exceeds a specified permissible threshold |
| Ventilation is natural |
| The room is less than 5 m² |
| Any refrigerant is present, regardless of the quantity |
5
Ľahká
How do leaks affect systems using flammable refrigerants?
| They improve efficiency |
| Have no effect |
| They lower the temperature |
| They cause refrigerant loss, reduced efficiency and a fire hazard |
6
Ľahká
Why is the cleanliness of heat exchangers in HC systems important?
| It doesn’t matter |
| It increases the pressure |
| Causes leaks |
| It improves heat transfer and reduces energy consumption |
7
Ľahká
What maintenance measures improve the efficiency of a system using a flammable refrigerant?
| Regular checks for leaks and operating parameters |
| Disabling safety devices |
| Lack of servicing |
| Increasing the refrigerant charge |
8
Ľahká
How does the correct selection of components affect a system using a flammable refrigerant?
| It lowers the temperature |
| It ensures safe and optimal operation and minimises energy losses |
| It increases the amount of refrigerant |
| It doesn’t matter |
9
Ľahká
Why is it important to use the correct service tools in HC systems?
| It doesn’t matter |
| It ensures operational safety and reduces refrigerant losses |
| Causes leaks |
| It increases energy consumption |
10
Ľahká
How does pipe insulation affect the efficiency of systems containing HC?
| It reduces energy losses and improves efficiency |
| It increases the pressure |
| It doesn’t matter |
| Causes leaks |