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ABSA: 4th Class Part B - Comprehensive Exam 4 150 Multiple Choice, 4th Class Part B , Units CA$18.32   Add to cart
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ABSA: 4th Class Part B - Comprehensive Exam 4 150 Multiple Choice, 4th Class Part B , Units

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ABSA: 4th Class Part B - Comprehensive Exam 4 150 Multiple Choice, 4th Class Part B , Units 2 Temporary hardness in feedwater is caused by: Select one: a. Magnesium sulphate b. Calcium carbonate c. Magnesium bicarbonate d. Sodium nitrate c What is the recommended boiler water pH for w...

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  • April 16, 2024
  • 28
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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  • absa 4th class part b comprehensive exam 4 150

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ABSA: 4th Class Part B - Comprehensive
Exam 4 150 Multiple Choice, 4th Class Part
B , Units 2
Temporary hardness in feedwater is caused by:
Select one:

a. Magnesium sulphate
b. Calcium carbonate
c. Magnesium bicarbonate
d. Sodium nitrate
c


What is the recommended boiler water pH for wet layup?
Select one:

a. 10
b. 12
c. 7.5
d. 7
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
b


Heavy oil recovered using SAGD or CSS is properly referred to as
Select one:

a. bottoms
b. crude
c. tar
d. bitumen
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
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
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
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
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
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
d


With antifriction bearings using grease, the bearings:
Select one:

a. Never require cleaning
b. Are cleaned less often than oil-lubricated bearings
c. can be cleaned by adding solvent to the grease cartridge
d. Must be cleaned twice as often as oil-lubricated bearings
b

, In a reaction turbine the steam ____________ when passing through moving blades.
Select one:

a. Velocity decreases
b. Velocity remains constant
c. Pressure decreases
d. Pressure increases
c


Which one of these government agencies or regulations covers the use and erection of work
platforms?
Select one:

a. Provincial elevator and hoisting device inspection branch
b. Industrial Accident Prevention Association
c. Occupational Health and Safety Act and Regulation
d. Boilers and Pressure Vessels Branch
c


An evaporator that can easily be cleaned and defrosted manually without interrupting the cooling
process is which type of evaporator?
Select one:

a. Shell and tube evaporator
b. Plate surface evaporator
c. Finned evaporator
d. Liquid recirculating evaporator
b


Air removal prior to a hydrostatic test:
Select one:

a. Is critical, because the air will compress during the test
b. Will prevent oxygen corrosion.
c. Is done by adding oxygen scavenging chemicals to the test water.
d. Is done with a vacuum pump.
a


Rust in the gauge glass is an indication that:
Select one:

a. Corrosion is occurring in the system
b. The continuous blowdown setting needs to be increased.
c. The dissolved solids concentration has peaked.
d. The boiler should be blown off.
a


The purpose of humidification is to:
Select one:

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