ABSA 4th Class Part B - Comprehensive Exam 4 questions with answers,

ABSA: 4th Class Part B - Comprehensive |\ |\ |\ |\ |\ |\ |\




Exam 4 questions with answers |\ |\ |\ |\




One of the legal responsibilities of the engineer during an
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inspection is: |\




Select one: |\




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 - CORRECT
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ANSWERS ✔✔b |\




The _____ tubes of a fired hot oil heater have fins on their outer
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surfaces.
Select one: |\




a. Water
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b. Radiant
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c. Extended type
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d. Fire - CORRECT ANSWERS ✔✔c
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The injection pump of a diesel engine is driven by:
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Select one: |\

,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 - CORRECT ANSWERS ✔✔a
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Ammonia, as well as being toxic, is also:
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Select one: |\




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 - CORRECT ANSWERS ✔✔b
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When a boiler primes, it means that:
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Select one: |\




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 - CORRECT
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ANSWERS ✔✔b |\




The slide valve of a steam engine is designed to:
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,Select one:|\




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 -
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CORRECT ANSWERS ✔✔a |\ |\




A journal bearing:
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Select one:|\




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 - CORRECT ANSWERS ✔✔a
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Smaller spark ignition engine use ____________ to vapourize
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gasoline:
Select one:|\




a. Carburetion
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b. Atomization
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c. Electric heaters
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d. Vapourizers - CORRECT ANSWERS ✔✔a
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, Heat load from people in a room is mostly affected by:
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Select one: |\




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 - CORRECT ANSWERS ✔✔b
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Testing a safety valve on a boiler by pulling the try-lever
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Select one: |\




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 - CORRECT ANSWERS
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✔✔a


The ______________ is a type of unitary air conditioning system
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that uses a direct expansion refrigeration system to provide
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cooling and dehumidification, without using ductwork.
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Select one: |\




a. Rooftop unit
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b. Window air conditioner
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c. Multi-zone system
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