Careers and Certification
HVACR generally falls into the _____ career cluster.
Architecture and Construction
The national law that covers workplace safety is _____.
OSHA
Service required to fix a system that is not operating correctly describes ______.
What is a repair
The base unit for mass in the US Customary measurement system is _____.
pound (lb)
As a substance is heated, its volume tends to _____.
increase
The initial setup of HVACR equipment and systems is _____ work.
What is installation
Lockout/tagout procedures _____.
ensure that electrical circuits remain de-energized while they are being worked
Many HVAC units use LEDs to flash a ______, which indicates that there is an equipment malfunction.
trouble code
The following are the three physical states of a substance, except _____.
force
Pascal’s law states that pressure applied on a confi ned fl uid is _____.
transmitted equally and undiminished
Employers value good work habits. These include the following, except _____.
being a gossip
Refillable refrigerant cylinders should not be filled more than _____.
80%
A hasty diagnosis and temporary fix to a system will likely result in a ______.
callback
Which two categories can energy be classified into?
Kinetic and potential
5.2
Refrigerant passing through a compressor quickly undergoes _____ compression, which means it is compressed without losing heat to its surroundings.
adiabatic
All persons who intend to install, maintain, service, or repair HVACR equipment should first acquire _____ certification.
EPA
When lifting heavy objects, _____.
A. lift with your legs, not your back
B. use a hand truck or dolly
C. wear a back brace for additional support
D. All of the above
D. All of the above
If a system is low on refrigerant, a technician should check for ______.
refrigerant leaks
A Btu is the amount of heat required to raise one pound of water _____.
by 1°F
Absolute pressure is gauge pressure plus _____ pressure.
atmospheric
All HVACR technicians who work with refrigerants that have the potential to harm the environment must be certifi ed by the EPA in accordance with Section 608 of the _____.
Clean Air Act
When an extension ladder is placed against a roof, the top of the ladder should extend a minimum of _____ beyond the support point.
3'
During a service call, information provided by the customer concerning previous problems with the equipment should be written on ______.
a work order or service contract
How many Btu per hour is equivalent to one ton of refrigeration?
12,000 Btu/hr
5.3
According to Boyle’s law, if a gas's temperature is held constant but its volume is doubled, its pressure will _____.
reduce by half