Exam (elaborations)
ABSA: 4th Class Part B -Comprehensive Exam 4 150 Multiple Choice, 4th Class Part B , Units 1-12.
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ABSA: 4th Class Part B -Comprehensive Exam 4 150 Multiple Choice, 4th Class Part B , Units 1-12.
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ABSA: 4th Class Part B -ComprehensiveExam 4 150 Multiple Choice, 4th
Class Part B , Units 1-12.
One of the legal responsibilities of the engineer during an inspection is:
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Select one: ii
a. To notify the Workers Compensation Board of the inspection
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b. Point out any known or suspected defects to the inspector
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c. To have at least two staff members present at all times
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d. To be in possession of an inspection certificate - b
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The _____ tubes of a fired hot oil heater have fins on their outer surfaces.
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Select one: ii
a. Water
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b. Radiant
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c. Extended type
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d. Fire - c
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The injection pump of a diesel engine is driven by:
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Select one: ii
a. A camshaft
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b. The governor
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c. The gudgeon pin
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d. Piston action - a
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Ammonia, as well as being toxic, is also:
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Select one: ii
a. A low pressure refrigerant
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b. Flammable
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c. Miscible with oil
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d. Odourless - b
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When a boiler primes, it means that:
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Select one: ii
a. The steam vent is open, to allow it to fill
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b. Water is being carried over with the steam
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c. The boiler is being over fired
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d. The water has not been chemically treated - b
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,The slide valve of a steam engine is designed to:
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Select one: ii
a. Allow steam to enter and leave the cylinder
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b. Prevent the engine from over-speeding
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c. Provide lubrication for the steam engine
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d. Drain the condensate from the cylinder during warm-up - a
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A journal bearing:
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Select one: ii
a. Supports a shaft
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b. require cooling water
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c. Does not require lubrication
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d. Controls thrust movement - a
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Smaller spark ignition engine use ____________ to vapourize gasoline:
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Select one: ii
a. Carburetion
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b. Atomization
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c. Electric heaters
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d. Vapourizers - a
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Heat load from people in a room is mostly affected by:
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Select one: ii
a. The building occupancy class
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b. The activity of the people
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c. The number of people
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d. The age of the people - b
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Testing a safety valve on a boiler by pulling the try-lever
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Select one: ii
a. Ensures the valve is free to operate
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b. Takes approximately two seconds
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c. Ensures the closing pressure is correct
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d. Ensures the popping pressure is correct - a
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The ______________ is a type of unitary air conditioning system that uses a direct
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expansion refrigeration system to provide cooling and dehumidification, without using
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ductwork.
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Select one: ii
a. Rooftop unit
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, b. Window air conditioner
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c. Multi-zone system
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d. Unit ventilator - b
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The property of oil that indicates its ability to support a load is:
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Select one: ii
a. Viscosity
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b. Viscosity index
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c. Pour point
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d. Floc point - a
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The inner walls and floor of a fired heater furnace are lined with:
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Select one: ii
a. Ceramic tile
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b. Refractory
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c. Asbestos blocks
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d. Fiberglass insulation - b
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A collar thrust bearing:
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Select one: ii
a. Has boundary lubrication
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b. Is used with steam turbines only
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c. Is an anti-friction type bearing
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d. Can support more load than a Michell thrust bearing - a
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With regard to hot oil leaving the heater, the operating parameter of particular importance
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is the oil:
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Select one: ii
a. Viscosity
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b. Temperature
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c. Velocity
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d. Pressure - b
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Buildings require heat sources to:
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Select one: ii
a. Offset the building's heat losses
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b. Replace the exhaust air
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c. Replace the ventilation air
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d. Offset the heat gain from the atmosphere - a
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ii Grooving and general thinning of the condensate return system is a result of:
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