C
HVAC NATE HEAT PUMP verified A+ questions and
answers.
Terms in this set (244)
is free from fraud and deception, is credible, is marked with
an honest person
integrity, and is fair in their dealings with others.
a legally binding agreement must always be in writing.
a feature is a special characteristic of a product
the benefit is the value received from using the product.
the department of transportation is responsible for the shipping and labeling of all refrigerants.
(DOT)
customers most often describe dry bulb temperature.
their comfort in terms of
Combustion is a chemical process.
a sling psychrometer measures relative humidity.
dry bulb
and wet bulb temperatures, which
are then used to determine
refrigerant vapors in high heart irregularities and unconsciousness.
concentration, if inhaled, can
cause
when possible, avoid working high risk of slipping and falling.
on slate tile roofs because
there is a
the damper on a bypass humidifier open in the winter.
must be
a wet bulb thermometer is a bulb covered with a water moistened cotton covering.
conventional liquid thermometer
with the
start Capacitor in series with the the start winding, connected
Capacitor start, induction run
motors use a by a potential relay in parallel with the start winding.
, start Capacitor in series with the start winding, connected
Capacitor-Start, Capacitor-Run
by a potential relay in parallel with the start winding, and a
Motors use a
permanent run Capacitor connected across both the start
and run windings.
Permanent split Capacitor one Capacitor installed permanently across both the start and
motors (PSC) use run windings, to both increase Starting torque and improve
running efficiency.
PSC motors are less have a limited starting torque. a hard start kit can be installed
expensive to to improve starting under load.
manufacture and use
but
motors above 5 horsepower used 240/460 volt 3 phase.
on belt- drive fans are typically
motors can have 2, 4, 6, or 8 poles. faster RPMs
fewer poles =
2 poles = 3600 rpm sync
4 poles = 1800 rpm sync
6 poles = 1200 rpm sync
8 poles = 900 rpm sync
properly run motors run at about slip speed.
95% of synchronous speed,
called
to change rotation direction of a 3 reverse the connection of any two terminals.
phase motor,
pictorial wiring diagrams components in their approximate positions in the equipment.
generally show
ladder diagrams are useful for troubleshooting.
the two lines on the sides of each leg of line voltage.
a ladder diagram
represent
the maximum safe temperature 125 degrees Fahrenheit. above that temp the cylinder pressure can
to store R- 410A cylinders is exceed safe limits and the safety disc may open.
if the 410a cylinder has been thermal expansion of the liquid can cause extremely dangerous
filled to greater than 80% hydrostatic pressure and a violent release of refrigerant or
liquid level, rupture of the cylinder itself.
a coil cleaning solution that 1/15 cleaner and 14/15 water
mixes at 1:14 (1 part cleaner to
14 parts water) has 15 parts in
HVAC NATE HEAT PUMP verified A+ questions and
answers.
Terms in this set (244)
is free from fraud and deception, is credible, is marked with
an honest person
integrity, and is fair in their dealings with others.
a legally binding agreement must always be in writing.
a feature is a special characteristic of a product
the benefit is the value received from using the product.
the department of transportation is responsible for the shipping and labeling of all refrigerants.
(DOT)
customers most often describe dry bulb temperature.
their comfort in terms of
Combustion is a chemical process.
a sling psychrometer measures relative humidity.
dry bulb
and wet bulb temperatures, which
are then used to determine
refrigerant vapors in high heart irregularities and unconsciousness.
concentration, if inhaled, can
cause
when possible, avoid working high risk of slipping and falling.
on slate tile roofs because
there is a
the damper on a bypass humidifier open in the winter.
must be
a wet bulb thermometer is a bulb covered with a water moistened cotton covering.
conventional liquid thermometer
with the
start Capacitor in series with the the start winding, connected
Capacitor start, induction run
motors use a by a potential relay in parallel with the start winding.
, start Capacitor in series with the start winding, connected
Capacitor-Start, Capacitor-Run
by a potential relay in parallel with the start winding, and a
Motors use a
permanent run Capacitor connected across both the start
and run windings.
Permanent split Capacitor one Capacitor installed permanently across both the start and
motors (PSC) use run windings, to both increase Starting torque and improve
running efficiency.
PSC motors are less have a limited starting torque. a hard start kit can be installed
expensive to to improve starting under load.
manufacture and use
but
motors above 5 horsepower used 240/460 volt 3 phase.
on belt- drive fans are typically
motors can have 2, 4, 6, or 8 poles. faster RPMs
fewer poles =
2 poles = 3600 rpm sync
4 poles = 1800 rpm sync
6 poles = 1200 rpm sync
8 poles = 900 rpm sync
properly run motors run at about slip speed.
95% of synchronous speed,
called
to change rotation direction of a 3 reverse the connection of any two terminals.
phase motor,
pictorial wiring diagrams components in their approximate positions in the equipment.
generally show
ladder diagrams are useful for troubleshooting.
the two lines on the sides of each leg of line voltage.
a ladder diagram
represent
the maximum safe temperature 125 degrees Fahrenheit. above that temp the cylinder pressure can
to store R- 410A cylinders is exceed safe limits and the safety disc may open.
if the 410a cylinder has been thermal expansion of the liquid can cause extremely dangerous
filled to greater than 80% hydrostatic pressure and a violent release of refrigerant or
liquid level, rupture of the cylinder itself.
a coil cleaning solution that 1/15 cleaner and 14/15 water
mixes at 1:14 (1 part cleaner to
14 parts water) has 15 parts in
