ABSA: 4th Class Part B - Comprehensive Exam 1 Questions and Answers 100% Pass

ABSA: 4th Class Part B - Comprehensive Exam 1 Questions and Answers 100% Pass Temporary hardness in feedwater is caused by: Select one: a. Magnesium sulphate b. Calcium carbonate c. Magnesium bicarbonate d. Sodium nitrate - Answer- c What is the recommended boiler water pH for wet layup? Select one: a. 10 b. 12 c. 7.5 d. 7 - Answer- a A photoelectric flame scanner: Select one: a. Produces a steady voltage signal b. Requires a clear line of sight to the flame c. conducts current through the flame d. uses a pilot-stat - Answer- b Heavy oil recovered using SAGD or CSS is properly referred to as Select one: a. bottoms b. crude c. tar d. bitumen - Answer- d Humidifying units that force warm air through a wet pad, and return the air to the room, are called: Select one: a. Wetted element humidifiers b. Pan type humidifiers with plates c. Atomizing humidifiers d. Bypass type humidifiers - Answer- a The kind of grease used for heavily loaded machinery operating at slow speeds is the: Select one: a. Sodium base grease b. Specialty grease c. Calcium base grease d. Aluminum base grease - Answer- b One of the advantages of gas-fired infrared heating over other types of heating systems is: Select one: a. Gas-fired infrared heaters can be used as the main heating source for a large building b. Gas-fired infrared heaters can provide effective spot heating c. Gas-fired infrared heaters require no fuel handling equipment d. Gas-fired infrared heaters can heat large volume enclosures with little fuel - Answer- b The normal loss of zeolite in a sodium zeolite softener is about _______ per year. Select one: a. 0.1 b. 0.15 c. 0.03 d. 0.05 - Answer- c A form of lubrication that requires continual motion of a shaft or surface is: Select one: a. Fluid film lubrication b. Forced lubrication c. Continuous lubrication d. Boundary lubrication - Answer- a A ________ is a fired heater installed where the heat is needed, that heats the air directly without the use of any ducting. Select one: a. Rooftop unit b. Unit ventilator c. Convector d. Unit heater - Answer- d