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ABSA 4TH CLASS PART A REVIEW LATEST 2025
WITH 250 REAL EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |AGRADE
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 - CORRECT 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 b. 3.81 m c. 1.87 m
d. 0.38 m - CORRECT 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. - CORRECT 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 - CORRECT ANSWER >>> b. A bypass
line, plus a safety valve and pressure gauge on the low-pressure side 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. b. 19. c. 10.
d. 132 - CORRECT ANSWER >>> c. 10.
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 - CORRECT ANSWER >>> c. Is
more accurate than the "U" tube manometer
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 - CORRECT ANSWER >>> c. Transducer
The __________ valve requires specific and routine lubrication. Select one: a. Butterfly b. Globe c. Check
d. Tapered plug - CORRECT ANSWER >>> d. Tapered plug
With reference to scalars and vectors, a space diagram: Select one: a. Shows the relationship of time to the vector. b. Illustrates a system of vectors. c. Shows the relationship of the scalar to the vector.
d. Illustrates a system of scalars. - CORRECT ANSWER >>> b. Illustrates a system of
vectors Brass and bronze are alloys of: Select one: a. iron
b. copper c. aluminum
d. lead - CORRECT ANSWER >>> b. copper
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 - CORRECT ANSWER >>> a. Have limited field
configurations 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 - CORRECT ANSWER >>> a. Co-operating with others on workplace safety
and health What is one of the two main purposes of the CSA B-52 code? Select one: 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. Allows the process variable to always be maintained at the set-point - CORRECT
ANSWER >>> b. Provides a proportional output based on the error between process variable
and set-point One of the national standards which each jurisdiction in Canada has adopted as part of their applicable Act and/or Regulations is the: Select one: a. CSA B b. ANSI Codes c. ASME Codes
d. NFPA Codes - CORRECT ANSWER >>> a. CSA B
A steam boiler is blown off intermittently in order to: Select one: a. Clean the soot and carbon out of the firebox and tubes b. Lower the dissolved solids concentration in the boiler water c. Discharge sediment and scale-forming matter from the boiler
d. Locate the steam level - CORRECT ANSWER >>> c. Discharge sediment and scale-
forming matter from the boiler _______ fittings are used to provide proper drainage of water. Select one: a. Removable b. Orifice c. Eccentric
d. Tapered - CORRECT ANSWER >>> c. Eccentric
Which of these is NOT used for burning coal? Select one: a. Under feed stoker b. Rotary cup stoker c. Cross feed stoker
d. Chain grate stoker - CORRECT ANSWER >>> b. Rotary cup stoker
Types of maintenance is classified in the following categories: Select one: a. Procurement, Inventory, Estimated, and Planned b. Routine, Preventative, Projects, and Emergency c. Notification, Submission, Review, and Approval
d. Completion, Projection, Extension, and Considerations - CORRECT ANSWER >>> b.
Routine, Preventative, Projects, and Emergency 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
One of best practices for writing SOPs is to: Select one: a. Allow all workers an opportunity to write a SOP b. Use a standardized template
The refrigeration condenser design that requires the tubes to be cleaned with acid and then neutralized, is the: Select one: a. Shell and tube condenser b. Shell and coil condenser c. Air-cooled condenser d. Evaporative condensers
e. Baffle condensers - CORRECT ANSWER >>> b. Shell and coil condenser
When 1 ampere of current flows through a resistance by the application of 1 volt the resistance will be 1: Select one: a. Watt b. Joule c. Ampere
d. Ohm - CORRECT ANSWER >>> d. Ohm
When isolating an electric motor driven pump, you should first: Select one: a. Close the pump inlet valve b. Open the motor breaker c. Ensure the pump is drained
d. Close the pump discharge valve - CORRECT ANSWER >>> b. Open the motor breaker
A common use for a DC generator is: Select one: a. Power supply for an elevator b. An automobile alternator
c. Emergency power
d. Power factor correction - CORRECT ANSWER >>> a. Power supply for an elevator
In a boiler, the continuous blowdown pipe is located: Select one: a. Where the purest boiler water collects b. At the very bottom of the steam drum c. A few inches below the top of the mud drum
d. A few inches below the water level in the steam drum - CORRECT ANSWER >>> d. A
few inches below the water level in the steam drum When an air heater is used in a boiler: Select one: a. The induced draft fan supplies combustion air to the air heater b. It increases the efficiency of the boiler c. The boiler usually has only a forced draft fan
d. A balanced draft system cannot be used - CORRECT ANSWER >>> b. It increases the
efficiency of the boiler This regulation lists the requirements which must be met for anyone wishing to write an applicable jurisdictional examination. Select one: a. Pressure Equipment Exemption Order b. Power Engineers Regulation c. Pressure Welders Regulation
d. Pressure Equipment Safety Regulation - CORRECT ANSWER >>> b. Power Engineers
Regulation
a. In order to measure density b. If purity is to be measured c. When a chromatograph is being used
d. When conductivity is measured - CORRECT ANSWER >>> c. When a chromatograph is
being used An open loop control system requires: Select one: a. A transducer and a recorder b. More accurate sensing devices c. A very small amount of dead time or lag
d. Constant operator attention - CORRECT ANSWER >>> d. Constant operator attention
Section lines of a drawing that show the material of construction are usually drawn at an angle of: Select one: a. 90° b. 30° c. 45°
d. 60° - CORRECT ANSWER >>> c. 45°
When using radiographic inspection, defects such as cracks and porosity show up as: Select one: a. Lighter shadows on the photographic paper b. Wave signals on a small screen c. Darker shadows on the penetrameter
d. Darker shadows on the photographic paper - CORRECT ANSWER >>> d. Darker
shadows on the photographic paper Beading the tube ends in a firetube boiler: Select one: a. stops tube leakage b. eliminates the need to expand the tubes into the tubesheet c. helps prevent overheating of the tube ends
d. must be followed by seal welding - CORRECT ANSWER >>> c. helps prevent
overheating of the tube ends If an electrical _____ is placed across a conductor, the electrons will drift from the negative end towards the positive end of the conductor. Select one: a. Potential b. Current c. Resistance
d. Wire - CORRECT ANSWER >>> a. Potential
If a welding electrode has the identifying number "E6016", what does the "1" represent. Select one: a. The welding position b. AC or DC with medium penetration c. DC reverse polarity with medium penetration
d. AC with deep penetration - CORRECT ANSWER >>> a. The welding position
a. a conversion method of waste disposal. b. a disposal method of waste handling. c. a chemical treatment of the waste.
d. a physical treatment of the waste. - CORRECT ANSWER >>> d. a physical treatment of
the waste. A copper alloy that contains tin, and sometimes zinc, is: Select one: a. Brass b. Bronze c. White metal
d. Babbit - CORRECT ANSWER >>> b. Bronze
Push nipples: Select one: a. Connect radiator sections together b. Are tapered in the middle c. Are used to connect pipes together in a heating system d. seal tighter than unions
e. Have decreasing cross-sectional areas from one end to the other - CORRECT ANSWER
>>> a. Connect radiator sections together
The amount of current passed through the water of an electrode boiler depends on the: Select one: a. Depth of the electrodes in the water b. Control valve setting
c. Speed of the circulating pump
d. Voltage setting of the pressure control - CORRECT ANSWER >>> a. Depth of the
electrodes in the water Water expands approximately ________ times when converted to steam Select one: a. 1600 b. 100 c. 6000
d. 10,000 - CORRECT ANSWER >>> a. 1600
The three markings mandatory on valves to be used in pressure piping include manufacturer's name, material designation and _______________. Select one: a. weight designation b. CRN number c. valve type
d. service designation - CORRECT ANSWER >>> d. service designation
The investigation of an accident involving a power plant: Select one: a. may be carried out by the Chief Inspector of the jurisdiction. b. Is not specified in a jurisdictional Act or Regulation. c. Is not of concern to the Chief Inspector
d. Is clearly outlined in the Engineer's Regulations - CORRECT ANSWER >>> a. may be
carried out by the Chief Inspector of the jurisdiction.
b. Bottom, side c. Plan, bottom
d. Plan, side - CORRECT ANSWER >>> d. Plan, side
The ratio between the ultimate strength and the allowable stress is called the: Select one: a. Ultimate stress b. Maximum allowable load c. Working stress
d. Safety factor - CORRECT ANSWER >>> d. Safety factor
The temperature at which all molecular motion is said to completely cease is: Select one: a. - 373°C b. 0°C c. 0°F d. - 460°R
e. 0 K - CORRECT ANSWER >>> e. 0 K
In fin coil type heaters, individual room temperature is controlled by Select one: a. Switches b. Automatic valves c. Dampers d. Air relays
e. Supply ducts - CORRECT ANSWER >>> c. Dampers
If a system is in equilibrium, which of the following statements is true? Select one: a. The system will not rotate because the moments in the system balance each other. b. The system will rotate counter-clockwise. c. The system will not rotate because no force is being exerted.
d. The system will rotate under the largest force. - CORRECT ANSWER >>> a. The system
will not rotate because the moments in the system balance each other. Idler gears: Select one: a. Are used to reverse the direction of the gear rotation. b. Create slippage c. Change the r/min of the driven gear.
d. Increase efficiency. - CORRECT ANSWER >>> a. Are used to reverse the direction of the
gear rotation. A multi-burner cluster has secondary and tertiary nozzles ignited by: Select one: a. An igniter spark b. An intermittent pilot flame c. An interrupted pilot
d. The primary burner - CORRECT ANSWER >>> d. The primary burner
SOPs should be: Select one: a. destroyed and replaced monthly b. Reviewed at regular intervals
