Aquastat - Study guides, Class notes & Summaries
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4th Class Power Engineering Unit A9 Chapter 6: Electrical Control Systems 100% Verified
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4th Class Power Engineering Unit A9 
Chapter 6: Electrical Control Systems 
 
100% Verified 
 
This type of thermostat is equipped with an open-contact switch or a snap switch: 
Select one: 
a. on-off control 
b. two position 
c. modulating 
d. multipositon a 
 
A two-terminal variable resistor used for varying current in a circuit is known as a: 
Select one: 
a. potentiometer 
b. rheostat 
c. thermistor 
 
d. photoresistor b 
 
These can be either normally closed or normally open: 
 
Select one...
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MN Boiler license 2023 Exam Questions with Complete Solutions
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MN Boiler license 2023 Exam Questions with Complete Solutions 
What is the unit called that controls starting and stopping of the burner by sensing temperature of water in a hot water boiler? - Answer-Aquastat 
 
What controls the temperature of the water in a hot water boiler system? - Answer- Aquastat or remote temperature monitoring system 
 
What safety devices should be installed on a hot water heating boiler? - Answer-Code safety valve(s) 
Low water fuel cutoff 
 
What removes air from a h...
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MN Boiler license Exam Questions and Answers Graded A+
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MN Boiler license Exam Questions and Answers Graded A+ 
 
What is the unit called that controls starting and stopping of the burner by sensing temperature of water in a hot water boiler? - Aquastat 
 
What controls the temperature of the water in a hot water boiler system? - Aquastat or remote temperature monitoring system 
 
What safety devices should be installed on a hot water heating boiler? - Code safety valve(s) 
Low water fuel cutoff 
 
What removes air from a hot water boiler system? - A...
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MN Boiler License Q&A Latest 2024
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MN Boiler License Q&A Latest 2024 
What is the unit called that controls starting and stopping of the burner by sensing temperature of water 
in a hot water boiler? - Answer -Aquastat 
What controls the temperature of the water in a hot water boiler system? - Answer -Aquastat or remote 
temperature monitoring system 
What safety devices should be installed on a hot water heating boiler? - Answer -Code safety valve(s) 
Low water fuel cutoff 
What removes air from a hot water boiler system? - Answ...
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MN Boiler license 2023 Exam Questions with Complete Solutions
- Exam (elaborations) • 10 pages • 2023
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MN Boiler license 2023 Exam Questions with Complete Solutions 
 
What is the unit called that controls starting and stopping of the burner by sensing temperature of water in a hot water boiler? - Answer-Aquastat 
 
What controls the temperature of the water in a hot water boiler system? - Answer-Aquastat or remote temperature monitoring system 
 
What safety devices should be installed on a hot water heating boiler? - Answer-Code safety valve(s) 
Low water fuel cutoff 
 
What removes air from a...
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Gas Fitter 2 Practice Test - Questions and Answers
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Gas Fitter 2 Practice Test - Questions and Answers Installation of one 400,000 btu natural draft boiler in a tight enclosure would require an air supply opening of? A. 114 sq in B. 50 sq in C. 58 sq in D 112 sq in With the installation of a 75,000 btu atmospheric hot water tank in a tight house, how much free air is required when using a round duct? A. 11" B. 4" C. 7" D. 3" A portable infrared heater that cannot be interlocked shall be connected to a: A. CO2 monitor alarm B. CO monitor ala...
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MN Special Boiler License Exam Guide for MHS Custodians Questions With Verified Answers
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MN Special Boiler License Exam Guide for 
MHS Custodians Questions With Verified 
Answers 
High Pressure Boiler - answerAbove 15psi steam & 160psi water pressure 
After blowing down column and glass the water should return how? - answerQuickly 
When entering a steam boiler room what is the first thing an operator should do? - 
answerCheck water level 
What type of safety valve is required - answerA.S.M.E. approved direct spring loaded 
When operating a boiler what is most important? - answerSafe...
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Gas tech II Exam Questions And Answers
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Gas tech II Exam Questions And Answers 
 
1) What is the minimum diameter of a pressure gauge needed to perform a leak test on gas piping? - ANS 3" 
 
2) Amp meter can read what? - ANS Conductor magnetic field. 
 
3) What would be the primary voltage of a furnace? - ANS 120/1/60. 
 
4) What is the function of an intermittent pilot? - ANS Stay on during the main burner operation. 
 
5) What is the millivolts power output on a thermocouple closed circuit test? - ANS 10 to 15 ...
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G2 Gas Technician Module 12 Revised || with 100% Error-free Solutions.
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What does an Aquastat do? correct answers Its an automatic operating switch (normally open). Sense water temperature of a boiler and closes when temperature drops. 
 
What does a low water cut off do? correct answers Automatic safety control (normally closed). Senses water level in the boiler. If level drops the switch opens and shuts off the gas valve. 
 
What does a water flow switch do? correct answers Automatic safety control (normally open). Senses water flow and switch closes, in series wi...
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G2 Gas Technician Module 12 Exam Questions and answers with 100% Complete Solutions | verified &updated 2024
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G2 Gas Technician Module 12 Exam Questions and answers with 100% Complete Solutions | verified &updated 2024 
What does an Aquastat do? - Its an automatic operating switch (normally open). Sense water temperature of a boiler and closes when temperature drops. 
What does a low water cut off do? - Automatic safety control (normally closed). Senses water level in the boiler. If level drops the switch opens and shuts off the gas valve. 
in series with gas valve.,What does a water flow switch do? - A...
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