4th TSSA Part B Test (I) 150 Questions With 100% Correct Answers.

When a combustion air opening is equipped with dampers, the dampers must be - interlocked with the burner, and fully open before starting the boiler. R4B A substance that absorbs humidity inside a boiler during dry layup is: - Activated alumina (4-142-1.3) The high oil temperature shutdown device of an oil-fired heater senses the: - Oil temperature at the furnace outlet R4B A boiler furnace pre-purge: - must last a specific amount of time. R4B In a building plumbing system, the potable water pressure should not drop below: - 175 kPa (4-066-1.13) Which of the following is an example of a dissolved solid? - Magnesium sulphate (4-143-2.11) "Barking", as it occurs in a pulp mill, means: - The removal of bark from the logs R4B A collar thrust bearing: - Has boundary lubrication 4B The combustion chamber of a gas turbine: - is where fuel is added to air, andburned. R4B All semi-solid lubricants: - Are capable of sealing out dirt and water from bearings (4-074-2.7) Compression type packing: - May be saturated with a lubricating material(4-059-3.4) The set pressure of a safety valve may only be adjusted by: - the safety valve manufacturer, its authorized representative, or an assembler (4-127-1.3) Air duct velocity pressure is measured by connecting a: - Manometer to the side of a duct, with a sensing tube extending inside of the duct directed toward the airflow R4B When the fireside of a boiler is opened up, locations of water leakage may be detected by: - White dissolved solids left from water evaporation As the temperature of the air drawn into a gas turbine compressor increases, the____________________ of the gas turbine _________________. - output power, decreases (4-066-3.6) The zeolite inside a water softener is used to: - Exchange sodium ions for calcium and magnesium ions (4-059-1.18) What does the boiler inspector do to prevent tampering with the settings of a safety valve? - Installs a seal (4-117-2.1) The amount of water used in an evaporative condenser is only a small percentage of that used in a water-cooled condenser of the same capacity, because - The cooling water evaporates, removing far more heat per kilogram of system coolant. R4B The resistance of a liquid to internal deformation or shear is known as: - Viscosity Direct measurement of condensate amine can be done using: - a chromatograph or a fluorometer