Refrigeration and Air Conditioning
Technology (2025/2026 Update) – Complete
Questions and Verified Answers
Introduction:
This document provides a comprehensive collection of
Refrigeration and Air Conditioning Technology questions and
verified answers for the 2025/2026 academic year. It covers key
topics such as refrigeration principles, heat pump systems, HVAC
safety practices, mechanical piping, and electrical components. The
material includes both theoretical and practical knowledge, ideal
for exam preparation and professional certification review.
Questions and Answers:
Describe the procedure for preparing and threading the end of a
steel pipe. -Answer:-Make sure the lines square up with the pipe
using the die, apply cutting oil, turn the die and make sure the
pipe is flushed.
,Describe each part of the thread dimension 1/4-18 NPT. -
Answer:-1/4 pipe and 18 thread
Name 4 types of plastic pipe. -Answer:-ABS, CPCV, PE, and PVDF
Describe three alternative mechanical piping methods. -Answer:-
Tubing connectors, metal teeth, and crimping
superheat -Answer:-the temperature of vapour refrigerant above
its satuation ( change of state) temperature
subcooled -Answer:-the temperature of a liquid when it is cooled
below its condensing temperature
condense -Answer:-changing a vapor to a liquid
compressor -Answer:-a vapour pump that pumps refrigerant or
air from one pressure level to a higher pressure level
specific volume -Answer:-is the amount of space a pound of vapor
or gas will occupy
, specific gravity -Answer:-is the property used to compare the
density of substances
BTU -Answer:-British Thermal Unit - 1 btu of heat energy is
required to raise the temp of 1 pound of water
daltons law -Answer:-the total pressure of a confined mixture of
non reactive gases
F -----> C -Answer:-C = ( F - 32) ÷ 1.8
C ----> F -Answer:-F= (1.8 x C) + 32
how many BTU per watt -Answer:-3.4313
1 hp equals how many watts -Answer:-746 watts
psia -Answer:-14.696
Technology (2025/2026 Update) – Complete
Questions and Verified Answers
Introduction:
This document provides a comprehensive collection of
Refrigeration and Air Conditioning Technology questions and
verified answers for the 2025/2026 academic year. It covers key
topics such as refrigeration principles, heat pump systems, HVAC
safety practices, mechanical piping, and electrical components. The
material includes both theoretical and practical knowledge, ideal
for exam preparation and professional certification review.
Questions and Answers:
Describe the procedure for preparing and threading the end of a
steel pipe. -Answer:-Make sure the lines square up with the pipe
using the die, apply cutting oil, turn the die and make sure the
pipe is flushed.
,Describe each part of the thread dimension 1/4-18 NPT. -
Answer:-1/4 pipe and 18 thread
Name 4 types of plastic pipe. -Answer:-ABS, CPCV, PE, and PVDF
Describe three alternative mechanical piping methods. -Answer:-
Tubing connectors, metal teeth, and crimping
superheat -Answer:-the temperature of vapour refrigerant above
its satuation ( change of state) temperature
subcooled -Answer:-the temperature of a liquid when it is cooled
below its condensing temperature
condense -Answer:-changing a vapor to a liquid
compressor -Answer:-a vapour pump that pumps refrigerant or
air from one pressure level to a higher pressure level
specific volume -Answer:-is the amount of space a pound of vapor
or gas will occupy
, specific gravity -Answer:-is the property used to compare the
density of substances
BTU -Answer:-British Thermal Unit - 1 btu of heat energy is
required to raise the temp of 1 pound of water
daltons law -Answer:-the total pressure of a confined mixture of
non reactive gases
F -----> C -Answer:-C = ( F - 32) ÷ 1.8
C ----> F -Answer:-F= (1.8 x C) + 32
how many BTU per watt -Answer:-3.4313
1 hp equals how many watts -Answer:-746 watts
psia -Answer:-14.696
