Power Engineering ABSA 4B Exam 2026 – Complete Study
Guide, Practice Questions & Certification Prep
1. After i a i bearing i has i been i removed i for i cleaning, i it i should i be i soaked
i for i a iperiod iof i hours iin iclean isolvent.
A) 12 ito i16
B) 12 ito i14
C) 14 ito i16
D) 10 ito i12
E) 15 i to i 16: i A
2. If i an i oil's i viscosity i changes i a i great i deal i with i little i temperature i change, i it
i will ithen ihave ia:
A) High ipour ipoint
B) High i carbon i residue
C) High iviscosity iindex
D) Low i pour i point
E) Low i viscosity i index: i E
3. Oil iadditives:
A) Never i lose i their i effect i during i use i of i the i oil
B) Are inot ia icomponent iof imost ilubrication ioil
C) Should ibe iused ias ilittle ias ipossible
D) Should i not i affect i all i other i characteristics igreatly
E) Will i always i affect i the i pour i point i greatly: i D
4. In i a i bearing, i the i lubricant i reduces i the i heat i produced i by:
A) Shock iabsorption
B) Wear ireduction
C) Proper isealing
D) Friction ireduction
E) Corrosion i reduction: i D
5. The ikind iof igrease iused ifor iheavily iloaded imachinery ioperating iat islow
ispeeds iis ithe:
A) Mixed ibase igrease
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,B) Sodium ibase igrease
C) Calcium i base i grease
D) Acid ibase igrease
E) Specialty i grease: i E
6. A i multi-stage i pump i would i be i used i when:
A) A i greater i volume i must i be i pumped
B) The i lift i is i great
C) The ihead iis igreat
D) The itemperature iof ithe iliquid iis ihigh
E) There i is i sufficient i floor i space: i C
7. The i name i given i to i pumps i that i use i gear i teeth, i vanes, i lobes, i or
i screws i to imove ithe ifluid ibeing ipumped iis ithe i type.
A) Reciprocating
B) Rotary
C) Axial iflow
D) Dynamic
E) Radial i flow: i B
8. New ipump ipacking ishould ibe iinstalled:
A) Every itime iprior ito istart iup
B) Tight ienough ito istop ileakage
C) Every ishut idown
D) Every iyear
E) Loose i enough i to i allow i leakage i for i lubrication: i E
9. It i is i generally i accurate i to i say i that:
A) 9.8 i kPa i pressure i results i from i every i metre i of i water i depth i or i height
B) 10.21 i kPa i will i result i from i 1 i metre i of i static i water i head
C) Atmospheric ipressure ihas ino ibearing i on istatic iwater ihead
D) A i water i height i or i depth i of i 10.34 i m i results i in i 1 i kPa
E) 1 ikPa iwill iresult ifrom ia iwater ihead iof i9.8 im: iA
10. The iliquid ito ia ilantern iring:
A) Should i not i enter i the i pump
B) Keeps i the i air i out i of i the i pump
2 i/ i39
,C) Should ialways icome ifrom ithe isame ipump
D) Should ibe iwarm iat iall itimes
E) Keeps i grease i from i leaking i out: i B
11. The i purpose i of i "wear i rings" i in i centrifugal i pumps i is i to:
A) Eliminate ithe ineed ifor ia i relief ivalve
B) Prevent i wear i at i the i pump i discharge
C) Prevent i wear i on i the i pump i inlet
D) Increase ithe iefficiency
E) Lower i the i pump i pressure: i D
12. What i kind i of i principal i driver i is i most i commonly i used i to i drive i all i sizes
i of icompressors?
A) Gas iturbine
B) Internal icombustion iengine
C) Hydraulic imotor
D) Steam iturbine
E) Electric i motor: i E
13. The ivalves ion ia ireciprocating icompressor iare iopened iby:
A) Hydraulic ipressure
B) The ieccentric
C) A ipressure idifference
D) A i timing i gear
E) The i camshaft: i C
14. What i kind i of i shaft i seal i would i be i most i appropriate i to i use i where
i some ileakage iis iacceptable?
A) Carbon irings
B) Mechanical
C) Dry igas
D) Liquid i Film
E) Labyrinth: i E
15. Air ireceivers imust ihave ia:
A) Thermometer
B) Gauge i glass
3 i/ i39
, C) Pressure irelief ivalve
D) High i water i alarm
E) High i pressure i alarm: i C
16. An iair icompressor ithat igives itwo icompression istrokes iper icrankshaft irev-
olution iis:
A) Multistage itwo icylinder
B) Multi-cylinder i single i acting
C) A i compound i unit
D) Single i acting
E) Single i cylinder i double i acting: i E
17. The ivertical idistance ifrom ithe iliquid isurface iup ito ithe ipump icenter iline iplus
ithe ivertical idistance ifrom ithe ipump icenter iline iup ito ithe isurface iof ithe iliquid
iin ithe idischarge itank iis:
A) Total istatic ihead
B) Static isuction ihead
C) Static idischarge ihead
D) Suction ilift
E) Total i discharge i head: i A
18. To i reduce i air i temperature i between i stages, i we i would i use:
A) an iintercooler
B) an iaftercooler
C) a ireceiver
D) a ichiller
E) a i dryer: i A
19. What i kind i of i shaft i seal i is i most i appropriate i to i use i with i flammable i and
i toxic igases?
A) Liquid i Film
B) Dry igas
C) Mechanical
D) Labyrinth
E) Carbon i rings: i B
4 i/ i39
Guide, Practice Questions & Certification Prep
1. After i a i bearing i has i been i removed i for i cleaning, i it i should i be i soaked
i for i a iperiod iof i hours iin iclean isolvent.
A) 12 ito i16
B) 12 ito i14
C) 14 ito i16
D) 10 ito i12
E) 15 i to i 16: i A
2. If i an i oil's i viscosity i changes i a i great i deal i with i little i temperature i change, i it
i will ithen ihave ia:
A) High ipour ipoint
B) High i carbon i residue
C) High iviscosity iindex
D) Low i pour i point
E) Low i viscosity i index: i E
3. Oil iadditives:
A) Never i lose i their i effect i during i use i of i the i oil
B) Are inot ia icomponent iof imost ilubrication ioil
C) Should ibe iused ias ilittle ias ipossible
D) Should i not i affect i all i other i characteristics igreatly
E) Will i always i affect i the i pour i point i greatly: i D
4. In i a i bearing, i the i lubricant i reduces i the i heat i produced i by:
A) Shock iabsorption
B) Wear ireduction
C) Proper isealing
D) Friction ireduction
E) Corrosion i reduction: i D
5. The ikind iof igrease iused ifor iheavily iloaded imachinery ioperating iat islow
ispeeds iis ithe:
A) Mixed ibase igrease
1 i/ i39
,B) Sodium ibase igrease
C) Calcium i base i grease
D) Acid ibase igrease
E) Specialty i grease: i E
6. A i multi-stage i pump i would i be i used i when:
A) A i greater i volume i must i be i pumped
B) The i lift i is i great
C) The ihead iis igreat
D) The itemperature iof ithe iliquid iis ihigh
E) There i is i sufficient i floor i space: i C
7. The i name i given i to i pumps i that i use i gear i teeth, i vanes, i lobes, i or
i screws i to imove ithe ifluid ibeing ipumped iis ithe i type.
A) Reciprocating
B) Rotary
C) Axial iflow
D) Dynamic
E) Radial i flow: i B
8. New ipump ipacking ishould ibe iinstalled:
A) Every itime iprior ito istart iup
B) Tight ienough ito istop ileakage
C) Every ishut idown
D) Every iyear
E) Loose i enough i to i allow i leakage i for i lubrication: i E
9. It i is i generally i accurate i to i say i that:
A) 9.8 i kPa i pressure i results i from i every i metre i of i water i depth i or i height
B) 10.21 i kPa i will i result i from i 1 i metre i of i static i water i head
C) Atmospheric ipressure ihas ino ibearing i on istatic iwater ihead
D) A i water i height i or i depth i of i 10.34 i m i results i in i 1 i kPa
E) 1 ikPa iwill iresult ifrom ia iwater ihead iof i9.8 im: iA
10. The iliquid ito ia ilantern iring:
A) Should i not i enter i the i pump
B) Keeps i the i air i out i of i the i pump
2 i/ i39
,C) Should ialways icome ifrom ithe isame ipump
D) Should ibe iwarm iat iall itimes
E) Keeps i grease i from i leaking i out: i B
11. The i purpose i of i "wear i rings" i in i centrifugal i pumps i is i to:
A) Eliminate ithe ineed ifor ia i relief ivalve
B) Prevent i wear i at i the i pump i discharge
C) Prevent i wear i on i the i pump i inlet
D) Increase ithe iefficiency
E) Lower i the i pump i pressure: i D
12. What i kind i of i principal i driver i is i most i commonly i used i to i drive i all i sizes
i of icompressors?
A) Gas iturbine
B) Internal icombustion iengine
C) Hydraulic imotor
D) Steam iturbine
E) Electric i motor: i E
13. The ivalves ion ia ireciprocating icompressor iare iopened iby:
A) Hydraulic ipressure
B) The ieccentric
C) A ipressure idifference
D) A i timing i gear
E) The i camshaft: i C
14. What i kind i of i shaft i seal i would i be i most i appropriate i to i use i where
i some ileakage iis iacceptable?
A) Carbon irings
B) Mechanical
C) Dry igas
D) Liquid i Film
E) Labyrinth: i E
15. Air ireceivers imust ihave ia:
A) Thermometer
B) Gauge i glass
3 i/ i39
, C) Pressure irelief ivalve
D) High i water i alarm
E) High i pressure i alarm: i C
16. An iair icompressor ithat igives itwo icompression istrokes iper icrankshaft irev-
olution iis:
A) Multistage itwo icylinder
B) Multi-cylinder i single i acting
C) A i compound i unit
D) Single i acting
E) Single i cylinder i double i acting: i E
17. The ivertical idistance ifrom ithe iliquid isurface iup ito ithe ipump icenter iline iplus
ithe ivertical idistance ifrom ithe ipump icenter iline iup ito ithe isurface iof ithe iliquid
iin ithe idischarge itank iis:
A) Total istatic ihead
B) Static isuction ihead
C) Static idischarge ihead
D) Suction ilift
E) Total i discharge i head: i A
18. To i reduce i air i temperature i between i stages, i we i would i use:
A) an iintercooler
B) an iaftercooler
C) a ireceiver
D) a ichiller
E) a i dryer: i A
19. What i kind i of i shaft i seal i is i most i appropriate i to i use i with i flammable i and
i toxic igases?
A) Liquid i Film
B) Dry igas
C) Mechanical
D) Labyrinth
E) Carbon i rings: i B
4 i/ i39
