ACRP CP FINAL EXAM LATEST 6 VERSION QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A
{2025/2026}
In a metal ion concentration cell, the surface in contact with ____
concentration of metal ions acts as the ____
A) lower, anode
B) lower, cathode
C) higher, anode
D) higher cathode - CORRECT ANSWER a
Theoretically, the potential of a structure changes by about ____mV for
each pH unit
A) 40
B) 50
C) 20
D) 70
E) 60 - CORRECT ANSWER e
The corrosion potential of a metal might be -500mV in an environment
with a pH of 7, but the corrosion potential might be ____ at a pH of 8?
A) -440mV
B) -660mV
C) -300mV
D) -560mV - CORRECT ANSWER d
True or false (t or f)
an acidic pH can be harmful to concrete, such as reinforced concrete
structures? - CORRECT ANSWER t
,A pH of less than ____ is considered to be harmful to concrete?
A) 4
B) 6
C) 5
D) 2
E) 8 - CORRECT ANSWER c
The rate of corrosion is directly ____ to ____ flow?
A) inproporinate, current
B) inproporinate, voltage
C) proportional, voltage
D) proportional, current - CORRECT ANSWER d
If a 1 Amp CP system must last 40 years and the electrochemical
equivalent for silicon chromium cast iron anodes is 0.75 lb/A-yr, how
many pounds of anodes are needed?
A) 50lbs
B) 35lbs
C) 25 lbs
D) 45lbs
E) 30lbs - CORRECT ANSWER e
All things being equal, the greater the magnitude of the difference
between two voltages of metals, the ____ the current flow and rate of
corrosion
A) higher
B) lower - CORRECT ANSWER a
True or False ( t or f)
Magnesium will corrode at a slower rate when connected to steel
rather than zinc? - CORRECT ANSWER f
,Which reference electrode is considered a primary reference electrode
because it is used to determine the potential of other secondary
reference electrodes that are better suited for field use?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER e
Most common used reference electrode for measuring potentials of
underground structures?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER a
True or false (t or f)
The potential of a reference electrode in the sun can decrease from 10
to 50mV versus an electrode kept in the dark? - CORRECT ANSWER
t
Which reference electrode is mostly commonly used in seawater?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER b
Which reference electrode is mostly commonly used in concrete
structures?
A) CSE
, B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER b
Which of the following is primarily a laboratory electrode?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc - CORRECT ANSWER c
When doing a structure to electrolyte potential , the structure is
connected via the _____ terminal and the reference is connected via
the _____ terminal
A) negative , positive
B) positive, negative - CORRECT ANSWER b
A potential of -0.810Vcse converted to Calomel (SCE)
A) +0.306 sce
B) -0.750 sce
C) -0.735 sce - CORRECT ANSWER c
A potential of -0.810Vcse converted to Ag/AgCI (SSC)
A) +0.306 ssc
B) -0.735 ssc
C) -0.750 ssc - CORRECT ANSWER c
A potential of -0.810Vcse converted to Zinc (ZRE)
A) +0.306 zre
B) -0.735 zre
C) -0.750 zre - CORRECT ANSWER a
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A
{2025/2026}
In a metal ion concentration cell, the surface in contact with ____
concentration of metal ions acts as the ____
A) lower, anode
B) lower, cathode
C) higher, anode
D) higher cathode - CORRECT ANSWER a
Theoretically, the potential of a structure changes by about ____mV for
each pH unit
A) 40
B) 50
C) 20
D) 70
E) 60 - CORRECT ANSWER e
The corrosion potential of a metal might be -500mV in an environment
with a pH of 7, but the corrosion potential might be ____ at a pH of 8?
A) -440mV
B) -660mV
C) -300mV
D) -560mV - CORRECT ANSWER d
True or false (t or f)
an acidic pH can be harmful to concrete, such as reinforced concrete
structures? - CORRECT ANSWER t
,A pH of less than ____ is considered to be harmful to concrete?
A) 4
B) 6
C) 5
D) 2
E) 8 - CORRECT ANSWER c
The rate of corrosion is directly ____ to ____ flow?
A) inproporinate, current
B) inproporinate, voltage
C) proportional, voltage
D) proportional, current - CORRECT ANSWER d
If a 1 Amp CP system must last 40 years and the electrochemical
equivalent for silicon chromium cast iron anodes is 0.75 lb/A-yr, how
many pounds of anodes are needed?
A) 50lbs
B) 35lbs
C) 25 lbs
D) 45lbs
E) 30lbs - CORRECT ANSWER e
All things being equal, the greater the magnitude of the difference
between two voltages of metals, the ____ the current flow and rate of
corrosion
A) higher
B) lower - CORRECT ANSWER a
True or False ( t or f)
Magnesium will corrode at a slower rate when connected to steel
rather than zinc? - CORRECT ANSWER f
,Which reference electrode is considered a primary reference electrode
because it is used to determine the potential of other secondary
reference electrodes that are better suited for field use?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER e
Most common used reference electrode for measuring potentials of
underground structures?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER a
True or false (t or f)
The potential of a reference electrode in the sun can decrease from 10
to 50mV versus an electrode kept in the dark? - CORRECT ANSWER
t
Which reference electrode is mostly commonly used in seawater?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER b
Which reference electrode is mostly commonly used in concrete
structures?
A) CSE
, B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE - CORRECT ANSWER b
Which of the following is primarily a laboratory electrode?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc - CORRECT ANSWER c
When doing a structure to electrolyte potential , the structure is
connected via the _____ terminal and the reference is connected via
the _____ terminal
A) negative , positive
B) positive, negative - CORRECT ANSWER b
A potential of -0.810Vcse converted to Calomel (SCE)
A) +0.306 sce
B) -0.750 sce
C) -0.735 sce - CORRECT ANSWER c
A potential of -0.810Vcse converted to Ag/AgCI (SSC)
A) +0.306 ssc
B) -0.735 ssc
C) -0.750 ssc - CORRECT ANSWER c
A potential of -0.810Vcse converted to Zinc (ZRE)
A) +0.306 zre
B) -0.735 zre
C) -0.750 zre - CORRECT ANSWER a
