UA Star Part 2.1

the proper installation height of the Hartford loop on a steam boiler is how many inches below the NOWL?

• at nowl

• 2-4 inches

• 6-10 inches

• 28 inches

to prevent priming in a steam boiler the horizontal steam main should be a minimum of what distance NOWL?

• 12 inches

• 24 inches

• 28 inches

• 2.31 feet

all except which of the following are flame proving methods?

• diode

• flame rectification

• infrared

• Ultraviolet

which type of ignition system uses a pilot flame?

• direct spark

• glow coil

• hot surface ignition

• intermittent

which of the following is NOT used to size gas regulators?

• inlet pressure

• type of ignition system

• pipe size

• Volume

if a gas regulator is located in the boiler room, typical code requires that the regulator vent needs to be piped where?

• indoors

• into the floor drain

• outdoors

• there is no connected piping required

electric heaters are usually composed of which of the following?

• capacitors

• inductors

• rectifiers

• resistors

What is the most likely cause if a technician finds that an electric heat element with voltage applied to the element has no current draw?

• lack of air flow

• low voltage to the element

• open or burned element

• too much voltage to the element

When replacing the element on an electric heater the technician should verify what the element(s) _______?

• Are not shorted to ground

• are streched as much as possible

• coils are turned clockwise

• Coil are turned counter clockwise

Which is an acceptable vent material for condensing boilers?

• a-vent

• b-vent

• pvc

• single wall vent