ABSA 4TH CLASS PART A REVIEW
QUESTIONS WITH VERIFIED SOLUTIONS
LATEST UPDATE
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
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
A valve which gives good throttling action, takes less actuator force, but does
not seal well is a: Select one:
a. Double seated valve
Page 1 of 101
,b. Reverse acting valve
c. Single seated valve
d. Direct acting valve --ANSWER--a. Double seated valve
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
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
A reducing agent or fuel could be:
Select one:
a. Carbon monoxide
b. A heavy metal oxide
Page 2 of 101
,c. Hydrogen peroxide
d. Concentrated Sulphuric acid --ANSWER--a. Carbon monoxide
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
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
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
Page 3 of 101
, b. 3.81 m
c. 1.87 m
d. 0.38 m --ANSWER--c. 1.87 m
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.
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 gauge on the low-pressure
side
c. Thermometers on the inlet and outlet piping
d. A strainer immediately downstream of the valve --ANSWER--b. A bypass
line, plus a safety valve and pressure gauge on the low-pressure side
Page 4 of 101
QUESTIONS WITH VERIFIED SOLUTIONS
LATEST UPDATE
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
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
A valve which gives good throttling action, takes less actuator force, but does
not seal well is a: Select one:
a. Double seated valve
Page 1 of 101
,b. Reverse acting valve
c. Single seated valve
d. Direct acting valve --ANSWER--a. Double seated valve
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
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
A reducing agent or fuel could be:
Select one:
a. Carbon monoxide
b. A heavy metal oxide
Page 2 of 101
,c. Hydrogen peroxide
d. Concentrated Sulphuric acid --ANSWER--a. Carbon monoxide
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
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
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
Page 3 of 101
, b. 3.81 m
c. 1.87 m
d. 0.38 m --ANSWER--c. 1.87 m
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.
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 gauge on the low-pressure
side
c. Thermometers on the inlet and outlet piping
d. A strainer immediately downstream of the valve --ANSWER--b. A bypass
line, plus a safety valve and pressure gauge on the low-pressure side
Page 4 of 101
