At atmospheric pressure - Study guides, Class notes & Summaries

BOMA – HVAC QUESTIONS AND ANSWERS 100% PASS Two basic categories of chillers are the compression cycle and absorption The five requirements for comfort are proper temperature, humidity, filtration, and ventilation circulation The primary function of an expansion device is to produce a reduction in the pressure on the liquid refrigerant, regulate the flow of refrigerant into the evaporator, lower the boiling point of the refrigerant far enough below the temperature of the load to g...

MN Boiler License Questions With Complete Solutions Graded A+ a question an answer what are the conditions necessary for good combustion? a) low sulfur content b) Thermal, thermocoupler, tubular c) turbulence, temperature, time 3T's c) turbulence, temperature, time 3T's why is secondary air necessary in hand fired boilers? a) Necessary to burn the combustible gases b) if primary air should fail c) used only if sulfur content is high a) Necessary to burn the combustible gases whe...

Back siphonage - ANSWER backflow due to negative or reduced pressure in water system. occurs during low pressure events such as a line leak Reverse flow caused by a loss of supply pressure Back Pressure - ANSWER Is caused when a potable water system is connected to a non potable supply operating under a higher pressure that pushes contaminated liquid back into the public water system Back Pressure - ANSWER Occurs when the pressure of the connected system exceeds the pressure of the drin...

What does PSIA stand for? - Psig + atmospheric pressure Carryover can lead to: - Water Hammer Water column & gauge glass should be blown down: - Daily If water leaves the boiler at 170•, what temperature does it return at? - 150• What is the most common cause of cast iron boiler failure? - Cracking The positioning control cannot function without: - Air

Upper respiratory system correct answers Nostrils Nasal cavity Guttural pouch Pharynx Larynx Trachea Sinus emphysema correct answers Pus in the sinuses Most common disease of paranasal sinuses Causes of sinus emphysema correct answers Dental disease Trauma Penetrating foreign body Complications from tumors/cysts Clinical signs of sinus emphysema correct answers Unilateral nasal discharge Head-shaking Facial asymmetry and distortion Weight loss Treatment of sinus emphysem...

In a reciprocating feedwater pump, the _______________ A. water piston is larger than the steam piston B. water and steam piston are the same size C. steam piston is larger than the water piston D. steam valve has to be as large as the water valve correct answer: C. steam piston is larger than the water piston An ignition arch is used with a(n) ________________ stoker A. sidefeed B. spreader C. underfeed D. chain grate correct answer: D. Chain grate The try cocks on a wat...

Low GWP Refrigerant Practice Exam With Verified And Updated Questions And Answers. The minimum concentration of a refrigerant that can propagate a flame through a consistent mixture of the refrigerant and air is known as the: Acute toxicity exposure limit (ATELL). Immediately dangerous to life or health concentration (IDLH). Lower flmmability limit (LFL). Upper explosive limit (UEL). - answerLower flmmability limit (LFL). The first stage of the evacuation process which removes non-conde...

internal respiration and external respiration - correct answerWhat are the 2 types of respiration? from a high area to a low area - correct answerIn which direction does air flow due to pressure differences? Gas exchange that occurs between the aleveoli and RBCs, and between the RBCs and tissue - correct answerWhat is internal respiration? air movement between the lungs and the atmosphere - correct answerWhat is external respiration? when air moves from the atmosphere into the lungs ...

Combustible Liquid - A liquid with a flash point ABOVE 100F 12.5 - If the current flowing out from an electrical panel is 12.5 amps, and it then flows through an electrical load of 1500 watts, what is the amperage of the remaining current flow of the return circuit? 1000 - If a hair dryer draws 8.3amps (in a home with 120-volt service), what is the wattage? *Power (P) = current (I) x voltage (V) Watts = amps x volts 1987 - The year of the first edition of NFPA 1033 1.5 times - ...

MD Stationary Engineer Practice Questions and Answers Latest Updated 2024/2025 (100% Correct) Gases of Combustion that cool on Contact with the boiler heating Surface before combushion is completed Cause a(n) _________ - Answer Formation of soot and smoke In the event of a flame failure, the programmer will______ - Answer Secure the fuel, purge the firebox, and then shut down Boil the water must be conditioned to prevent ______ (3 Answers) - Answer Formation of scale, oxygen pitting, carry...