ABSA 4TH CLASS PART A REVIEW Questions with CORRECT Answers (Grade A+)

ABSA 4TH CLASS PART A REVIEW Questions with
CORRECT Answers (Grade A+)

Question 1:
When applying to write a Power Engineer certificate of competency examination, the candidate must:
Select one: a. Undergo mandatory drug testing b. Hold the next lower class of qualification c. Pass a
criminal records check d. Pass both a written and oral examination
Answer:
b. Hold the next lower class of qualification

Question 2:
A machine lifts a load of 12kN with an applied effort of 4kN. What distance will the load move if the
effort moves a distance of 8m and the efficiency of the machine is 70%? Select one: a. 0.54 m b. 3.81
m c. 1.87 m d. 0.38 m
Answer:
c. 1.87 m

Question 3:
Which of these is the "Mechanical Refrigeration Code"? Select one: a. ASME MRC b. CSA B51. c.
CSA B52. d. ASME Section I.
Answer:
c. CSA B52.

Question 4:
In order to ensure safe and continuous operation of a pressure reducing valve, the valve station should
have _________________. Select one: a. A safety valve on the high-pressure side b. A bypass line,
plus a safety valve and pressure
Answer:
b. A bypass line, plus a safety valve and pressure gauge on the low-pressure side gauge on the
low-pressure side c. Thermometers on the inlet and outlet piping d. A strainer immediately downstream
of the valve

,Question 5:
If the power dissipated by a resistor is 1.2 kW when supplied with 110 V, the amperage will be _____
A. Select one: a. 91.666 b. 19.006 c. 10.91 d. 132
Answer:
c. 10.91

Question 6:
The inclined "U" tube manometer: Select one: a. Will measure pressure in MPa b. Can only be used
with mercury c. Is more accurate than the "U" tube manometer d. Is more difficult to read than the
U-tube manometer
Answer:
c. Is more accurate than the "U" tube manometer

Question 7:
A valve which gives good throttling action, takes less actuator force, but does not seal well is a: Select
one: a. Double seated valve b. Reverse acting valve c. Single seated valve d. Direct acting valve
Answer:
a. Double seated valve

Question 8:
The main component of any computer is the: Select one: a. Keyboard b. Screen c. Memory d. Central
processing unit
Answer:
d. Central processing unit

Question 9:
In most sizes of pipe, Schedule 40 corresponds to _____ wall thickness. Select one: a. Welded only b.
Threaded only c. Extra strong (XS) d. Standard
Answer:
d. Standard

Question 10:
A reducing agent or fuel could be: Select one: a. Carbon monoxide b. A heavy metal oxide c. Hydrogen
peroxide d. Concentrated Sulphuric acid
Answer:
a. Carbon monoxide

,Question 11:
A control device which will change one form of energy into another form of energy is the: Select one:
a. Logic device b. Primary element c. Transducer d. Transmitter
Answer:
c. Transducer

Question 12:
The __________ valve requires specific and routine lubrication. Select one: a. Butterfly b. Globe c.
Check d. Tapered plug
Answer:
d. Tapered plug

Question 13:
With reference to scalars and vectors, a space diagram: Select one: a. Shows the relationship of time to
the vector.
Answer:
b. Illustrates a system of vectors b. Illustrates a system of vectors. c. Shows the relationship of the
scalar to the vector. d. Illustrates a system of scalars.

Question 14:
Brass and bronze are alloys of: Select one: a. iron b. copper c. aluminum d. lead
Answer:
b. copper

Question 15:
PLC's for Burner Management Systems can: Select one: a. Have limited field configurations b. Be used
without any field testing c. Be set up by technicians at burner repair companies d. Be programmed by
operators
Answer:
a. Have limited field configurations

, Question 16:
Which is the workers responsibility? Select one: a. Co-operating with others on workplace safety and
health b. Issuing proper safety equipment to all workers c. Clearly stated goals and objectives of the
health and safety program d. Clearly defined roles and responsibilities for management, workers,
contractors, and visitors at the plant site
Answer:
a. Co-operating with others on workplace safety and health

Question 17:
What is one of the two main purposes of the CSA B-52 code? Select one:
Answer:
b. To promote uniform requirements among the provinces and territories a. (b) & (d) b. To promote
uniform requirements among the provinces and territories c. Terms and equipment relating to
refrigeration and air conditioning equipment are defined. d. The various classifications of buildings and
occupancies are listed and described with examples of each classification given.

Question 18:
Settling ponds and grease traps are methods used to: Select one: a. decrease liquid pollution. b. are part
of all liquid treatment facilities. c. remove solid matter from feedwater. d. very effective at removing
small colloidal particles from effluent.
Answer:
a. decrease liquid pollution.

Question 19:
A simple machine is required to raise 1 tonne of stones a vertical distance of 30m. If the efficiency of
the pulley is 100%, how much work must be done on the pulley to raise the stone? Select one: a. 294.3
J b. 30 kJ c. 35 kJ d. 294.27 kJ
Answer:
d. 294.27 kJ

Question 20:
A proportional controller: Select one: a. Is also called a multi-position controller b. Provides a
proportional output based on the error between process variable and set-point
Answer:
b. Provides a proportional output based on the error between process variable and set-point c. Provides
on-off control d. Allows the process variable to always be maintained at the set-point