Hvac oil burner - Study guides, Class notes & Summaries

______________ is to exhaust unburned gas in a combustion chamber before ignition by exhauster so the gas explodes can be prevented - Pre-purge A ______ has two or three operators physically in series but wired in parallel with one another this builtin safety feature allows any operator (pilot or main) to block - Redundant gas valve A ________ In a hydraulic piping system allows for two separate fluids at different temperatures to enter the valve and be controlled so only a single set fluid ...

NHIE-Nachi HVAC System | Questions and Answers High-efficiency condensing HVAC systems produce excessive _______________. Condensate Forced-air furnaces function primarily by ________. Convection Radiation is the transfer of heat energy by _________________. electromagnetic wave motion Heat can move from one body to another by _________. Radiation Heat is transferred _____________. in direct rays Heat transferred within a gas or liquid happens via __________. Convection Heat transferred throug...

HVAC CONTRACTOR EXAM Questions and Answers Latest Verified An instrument that measures potential differences between 2 points in an electrical circuit is called? A. potentiometer B. thermistor C. ohmeter D. voltmeter - CORRECT ANSWER-voltmeter This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and control superheat A. automatic expansion valve B. thermostatic expansion valve C. low side float D. schraeder valve - CORRECT ANSWER-thermostat...

HVAC CONTRACTOR EXAM PRACTICE QUESTIONS AND ANSWERS (100% PASS) An instrument that measures potential differences between 2 points in an electrical circuit is called? A. potentiometer B. thermistor C. ohmeter D. voltmeter - Answer️️ -voltmeter This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and control superheat A. automatic expansion valve B. thermostatic expansion valve C. low side float ©PREP4EXAMS 2024/2025 REAL EXAM DUMPS Tuesda...

Hvac Journeyman Exam Questions and Answers Updated 2024/2025 | 100% Verified. Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or repaired and retested(C) repaired by a certified welder(D) ignored, as the operating pressure is much less than the air test. - ANSWER-B. Fitting shall be replaced or repaired and retested. UMC Section 1316.4.3 Every absorption refrigerating system supported from the ground shall rest on a concrete slab extending not less than _____ the a...

An up flow furnace - Has the return air at the bottom Of the six regular grades of fuel oil,The grade most commonly used in residential and light commercial heating systems is No. - 2 How much heat is produced when 2 gallons of No. 2 fuel oil is burned? - 280,000 What could be the cause of a high steak temperature - Too much air How would you prove a furnace was stopped up with soot in the heat exchanger - Draft gauge at the inspection door What is the function of a heat exchanger - To ex...

Hvac Journeyman Exam Questions and Answers Updated 2024/2025 (100% Verified) Every absorption refrigerating system supported from the ground shall rest on a concrete slab extending not less than _____ the adjoining ground level.(A) 3 inches below(B) 3 inches above (C) 6 inches below(D) 6 inches above. - ANSWER-B. Slab extending not less than 3" above the adjoining ground level. UMC Section 1106.2 Any part of a venting system installed at an angle greater than 45 degrees from the vertical i...

HVAC OIL BURNER EXAM WITH QUESTIONS AND ANSWERS #12.

HVAC CONTRACTOR EXAM COMPLETE SOLUTIONS An instrument that measures potential differences between 2 points in an electrical circuit is called? A. potentiometer B. thermistor C. ohmeter D. voltmeter ️voltmeter This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and control superheat A. automatic expansion valve B. thermostatic expansion valve C. low side float D. schraeder valve ️thermostatic expansion valve when installing a re...

HVAC Exam Questions with Correct All A An electric heating unit in a duct system is classified as a - Answer-forced draft convector Radiant heat is transferred by? - Answer-infrared rays The limit switch is used on the electric element assembly to - Answer-open the circuit to the element if the furnace overheats Technician "A" says that a fusible link can be jumped out temporarily to allow the customer to get heat until the next business day. Technician "B" says that if the fuses...