Chapter- 100-119 Flashcards
How many BTUs are raise 2 lbs of water from 32f to 212f
180
360
970
- 212 -32= 180 x 2
A stoker that uses a feed RAM is a
Underfeed stoker
Over feed stoker
A chain grate stoker
Underfeed stoker
Water scale can be removed by boiling or raising water temperature is
Calcium
Magnesium
Temporary
Temporary
What is the proper way of testing a safety calve
Allow pressure to build up 75% before lifting the test level
Allow pressure to raise up to 20%
Allow pressure to build up to 75% before lifting the test lever
What s safety valve discharge it should relieve the boiler so that the pressure does not exceed more than
1%
6%
5%
10%
6%
When conducting a evaporation test the operator must secure what
The flame to the burner
The feed water to the boiler
The power to the boiler
The feed water to the boiler
What steam trap has one movable device that rises to allow steam through and reset on condensate
Thermodynamics
Thermostatic trap
Inverter bucket trap
Float trap
Float trap
What part in a refrigeration cycle discharges hight temperature pressure of vapor
Condenser
Compressor
Evaporator
Metering device
Compressor
What part in a refrigeration cycle discharges low pressure liquid
Evaporator
Compressor
Condenser
Expansion valve
Expansion vave
The chief heat producing elements in fuels contents are
Carbon and hydrogen
Hydrogen and oxygen
Sulfur and hydrogen
Carbon and hydrogen
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
What is the maximum range of pressure settings of all the saturated steam safety valves on boilers
3% of the highest set valve
6% of the highest set valve
10% of the highest set valve
12% of the highest set valve
10% of the highest set valve
How is a boiler hydrostatic test performed
The same way an accumulation test is performed
Fill the boiler with 70f of water and raise the pressure to 1.5 MAWP
Fire the boiler to max pressure
Fill the boiler with 70f of water and raise the pressure to 1.5 MAWP
Element feed regulator senses what to control water flow
Air pressure, water level, steam flow
Water level, steam flow, water flow
Steam pressure, steam flow, water leve
Water level, steam flow, water flow
On/off controls that active device using a one variable pressure are called
Analog controls
Discrete controls
Telemetry controls
Discrete controls
