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Delaware-HVACR Heating, Air Conditioning and Refrigeration Online Practice Test

These are actual questions from our online practice test.

We have included a question from each chapter of the test. Every question will be multiple choice. The answers are not included with the sample.

Sample Questions

# Chapter Title Question
1 Compressors, Refrigerants, Valves, Air Conditioning and Thermostats The ability of the conductors to dissipate heat is reduced when many conductors are ____________ together.
2 Evaporators, Lubricants, Pipelines and Water Pressure

The shell and tube or shell and coil condenser acts as __________.

3 Two Pipe Cooling, Heating Systems, Pipe Configurations, Gas Pipes, Vents and Mathematics Regarding removal of pipe, the line shall be first disconnected from all sources of gas and then thoroughly purged with __________, water, or inert gas before any cutting or welding is done when piping containing gas is to be removed.
4 Speed, Curves, Motor Controls and Occupancies Energy sources used for HVAC include electricity and ________.
5 Installation, Ductwork, Gas Pipes, Vents and Pumps It takes centrifugal force to produce flow for the ________________ pump.
6 Applications, Distribution and Design Data Systems The surrounding air in which all HVAC equipment must have to operate is __________________ air.
7 Installation and Troubleshooting Flame rod sensor proves the presence of a pilot or _________ flame.
8 Temperatures, Furnaces, Valves and Hydronics

Excessive heat or pressure may cause the system to fail. At least one combination over-temperature and over-pressure relief valve is always fitted to the system to allow the steam or water to vent to the atmosphere in case of the failure.

9 Compressors, Ducts, Furnaces and Exhaust Hoods What type of valve is a slideable baffle that opens or closes to allow water flow?
11 Pump Description The two principal types of centrifugal pumps for HVAC are axial flow pumps and __________ pumps .
12 Refrigeration Venting and Service The vent pipe or chimney should extend at least _____ above the highest part of the roof.
13 Refrigeration Cooling, Heating Loads, Ventilation and Fundamentals Regarding Celsius degrees, -2 + 2/2 = _____________ degree days (C).
14 Electrical Knowledge

Voltage drop for AC Systems, should total no more than 5% under full load conditions. Drop may be significantly larger during surge or motor starting conditions -- sometimes in the 15% to 25% range if other devices on the system can withstand this momentary dip. Voltage drop for DC Systems, should be designed as low as possible or less than _________ %.

15 Testing and Symbols EPA classification Type 1 =
15 Temperatures, Furnaces, Valves and Hydronics

Excessive heat or pressure may cause the system to fail. At least one combination over-temperature and over-pressure relief valve is always fitted to the system to allow the steam or water to vent to the atmosphere in case of the failure.

16 Compressors, Refrigerants, Valves, Air Conditioning and Thermostats What are the two types of compressor drives?
17 Definitons Cryogenics
18 OSHA Safety, Dig Alert, Training, Asbestos and Code of Federal Regulations, Title 29, Part 1926 According to the APWA Uniform color code, the color red identifies ___________.
19 Basic Estimating, Blueprint Reading and Plans A revision (marker) is shown on the completed set of working drawings by _______________.
20 Mathematics and Calculations Simplify 2/15 + 2/5 = ___________.


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