4TH CLASS ABSA EXAM PART A ONLINE PRACTICE EXAM 2026
| ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS
An ____ is designed to dehumidify and extract heat from an area.
1. air conditioner
2. dehumidifier
3. duct
4. evaporator
5. furnace ------------Correct Answer--------------------1. air conditioner
Comparing short tube coil lengths to long coil tube lengths, long coil
tube lengths are more prone to ____.
1. freeze-ups
2. corrosion
3. eddy-currents
4. vapour lock
5. erosion ------------Correct Answer--------------------1. freeze-ups
The majority of the wear in fluid film bearing occurs:
1. During full speed operation
,2. During initial startup
3. While shutdown is occurring
4. During startup and shutdown periods
5. During over-speed periods ------------Correct Answer--------------------4.
During startup and shutdown periods
Effects of cavitation in pumps:
1. Heavy wear on the metal surfaces, consisting of lots of tiny
indentations where the bubbles collapsed.
2. Small to fair amount of vibration.
3. All of the above
4. Small to fair amount of noise.
5. Reduced discharge flow rates ------------Correct Answer--------------------
3. All of the above
On/off combustion control is typically installed on ____.
1. super critical boilers
2. large watertube boilers
3. large packaged boilers
4. small packaged boilers
,5. unsupervised boiler ------------Correct Answer--------------------4. small
packaged boilers
Temporary hardness in boiler feed-water can result from ____.
1. methyl orange
2. phenolphthalein
3. coagulants
4. flocculants
5. magnesium bicarbonate ------------Correct Answer--------------------5.
magnesium bicarbonate
The dehydration stage in a natural gas processing plant is where
entrained ____ is removed from the natural gas stream.
1. hydrocarbons and water vapour
2. crude oil and gasoline
3. glycol
4. mercaptan and odorant
5. desiccant ------------Correct Answer--------------------1. hydrocarbons
and water vapour
, Referring to maintenance what does the acronym PM stand for:
1. Planned maintenance
2. Preventative maintenance
3. Primary maintenance
4. Pump mechanics
5. Purposeful maintenance ------------Correct Answer--------------------2.
Preventative maintenance
The reciprocating motion of the ____ on a steam engine enables the
steam to enter and exit the engine cylinder.
1. scavenging valve
2. sealing valve
3. stop valve
4. sentinel valve
5. slide valve ------------Correct Answer--------------------5. slide valve
Due to the importance of knowing which refrigeration system piping
contains ____ it is recommended it be orange in colour with black font.
1. Ammonia (R-717)
2. Hydrogen Sulphide
3. Nitrogen
| ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS |
VERIFIED ANSWERS
An ____ is designed to dehumidify and extract heat from an area.
1. air conditioner
2. dehumidifier
3. duct
4. evaporator
5. furnace ------------Correct Answer--------------------1. air conditioner
Comparing short tube coil lengths to long coil tube lengths, long coil
tube lengths are more prone to ____.
1. freeze-ups
2. corrosion
3. eddy-currents
4. vapour lock
5. erosion ------------Correct Answer--------------------1. freeze-ups
The majority of the wear in fluid film bearing occurs:
1. During full speed operation
,2. During initial startup
3. While shutdown is occurring
4. During startup and shutdown periods
5. During over-speed periods ------------Correct Answer--------------------4.
During startup and shutdown periods
Effects of cavitation in pumps:
1. Heavy wear on the metal surfaces, consisting of lots of tiny
indentations where the bubbles collapsed.
2. Small to fair amount of vibration.
3. All of the above
4. Small to fair amount of noise.
5. Reduced discharge flow rates ------------Correct Answer--------------------
3. All of the above
On/off combustion control is typically installed on ____.
1. super critical boilers
2. large watertube boilers
3. large packaged boilers
4. small packaged boilers
,5. unsupervised boiler ------------Correct Answer--------------------4. small
packaged boilers
Temporary hardness in boiler feed-water can result from ____.
1. methyl orange
2. phenolphthalein
3. coagulants
4. flocculants
5. magnesium bicarbonate ------------Correct Answer--------------------5.
magnesium bicarbonate
The dehydration stage in a natural gas processing plant is where
entrained ____ is removed from the natural gas stream.
1. hydrocarbons and water vapour
2. crude oil and gasoline
3. glycol
4. mercaptan and odorant
5. desiccant ------------Correct Answer--------------------1. hydrocarbons
and water vapour
, Referring to maintenance what does the acronym PM stand for:
1. Planned maintenance
2. Preventative maintenance
3. Primary maintenance
4. Pump mechanics
5. Purposeful maintenance ------------Correct Answer--------------------2.
Preventative maintenance
The reciprocating motion of the ____ on a steam engine enables the
steam to enter and exit the engine cylinder.
1. scavenging valve
2. sealing valve
3. stop valve
4. sentinel valve
5. slide valve ------------Correct Answer--------------------5. slide valve
Due to the importance of knowing which refrigeration system piping
contains ____ it is recommended it be orange in colour with black font.
1. Ammonia (R-717)
2. Hydrogen Sulphide
3. Nitrogen
