Absa 4Th Class Part A Review Exam Questions And Verified Answers.

ABSA 4TH CLASS PART A REVIEW EXAM
QUESTIONS AND VERIFIED ANSWERS
Question 1
Fluidized bed boilers can successfully burn coal with ash contents as high as Select
one:
a. 30%
b. 55%
c. 60%
d. 70%
Correct Answer
d. 70%



Question 2
A boiler blowoff system is equipped with slow and fast opening valves. The quick
opening valve is placed: Select one:
a. Closest to the boiler and opened first
b. Furthest from the boiler and opened first
c. Closest to the boiler and opened last
d. Furthest from the boiler and opened last
Correct Answer
a. Closest to the boiler and opened first



Question 3
An induced draft fan handles:
Select one:
a. Air from the combustion chamber
b. Air going to the combustion chamber
c. Flue gases going to the combustion chamber
d. Flue gases from the combustion chamber
Correct Answer
d. Flue gases from the combustion chamber




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,Question 4
The main purpose of insulation on piping systems is to:
Select one:
a. Reduce heat transfer between the pipe and its surroundings
b. Allow for the application of line identifier stickers and flow arrows
c. Provide a paint surface
d. Prevent condensate from evaporating in the lines
Correct Answer
a. Reduce heat transfer between the pipe and its surroundings



Question 5
What are the welds called which are carried out on the parts of a pressure vessel
which directly contains the internal forces generated?
Select one:
a. pressure containment welds
b. pressure mitigation welds
c. pressure integrity welds
d. pressure boundary welds
Correct Answer
d. pressure boundary welds



Question 6
The field strength of an alternator can be adjusted by varying the amplitude of the DC
power supply to the: Select one:
a. Rotating field
b. Stator windings
c. Rotating stator
d. Pole pieces
Correct Answer
a. Rotating field




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,Question 7
The valve that is least susceptible to wire drawing and seat erosion is the _________
valve. Select one:
a. Globe
b. Gate
c. Plug
d. Wedge gate
Correct Answer
a. Globe



Question 8
One of the main advantages of verbal communication is:
Select one:
a. Talking to people on the other side of the office
b. Immediate feedback and clarification
c. There is a permanent record of the communication
d. It takes longer to process the wording than written communication
Correct Answer
b. Immediate feedback and clarification



Question 9
Sound pressure level is expressed in:
Select one:
a. pounds per square inch
b. kiloPascals
c. Decibels
d. Pascals
Correct Answer
c. Decibels




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, Question 10
In a vertical sectional boiler, the sections are placed:
Select one:
a. One above the other
b. Side by side
c. On the furnace
d. Above the draft hood
Correct Answer
b. Side by side



Question 11
A simple wheel and axle has a wheel diameter of 2.3m and an axle diameter of 92mm.
If an effort of 26N is required to raise a mass of 16kg, what is the efficiency of the
machine?
Select one:
a. 2.46%
b. 95.3%
c. 24.1%
d. 20.1%
Steam is
Correct Answer
c. 24.1%



Question 12
The Act then has _____ which are pursuant to the enforcement of the Act.
Select one:
a. Proclamations
b. Laws
c. Edicts
d. Regulations
e. Bills
Correct Answer
d. Regulations




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