Questions On Review 31-40 Flashcards
What is platinum used in RTD (resistive temperature device)
Because of its ability at high temperature
Down comers
Booster pump
Because of its ability at high temperature
In a HVAC system controlled by thermostat the difference is the difference between the
Set point and the temperature at which the switch turns the system on
Set point and the temperature at which the switch turns the system off
Set point and the temperature at which the switch turns the system off
What is the purpose of a suction accumulation
It prevents moisture that condenses on refrigerant lone from getting in the compressor
It contains liquid refrigerant to allow evaporation prior to entering the compressor
It contains liquid refrigerant to allow evaporation prior to entering the compressor
What do you call a reading from the center point of an impeller across to the gauge
Static pressure
Head pressure
Static pressure
Status suction
Static pressure
One psi equals
3
2,5
2.31
2.31
What is the proper way of testing a safety valve
Allow pressure to build up to 75% before lifting the test lever
Allow pressure to rise up to 30%
Allow pressure to build up to 75% before lifting the test lever
What steam trap has one movable device that rises to allow steam through and resets
Thermodynamic
Thermostatic trap
Float trap
Float trap
Proximate analysis reports which of the following
The chemical content
The volatile matter percent of moisture, fixed carbon and ash
The volatile matter percent of moisture, fixed carbon and ash
How is the boiler hydrostatic test performed
The same way an accumulation test is performed
Fill the boiler with 70 f of water and raise the pressure to 1.5 MAWP
Fill the boiler with 70 f of water and raise the pressure to 1.5 MAWP
A 3 element feed regulator senses what to control water flow
Air pressure water level steam pressure
Water level steam flow water flow
Steam pressure steam flow water level
Water level steal flow water flow
