NACE CP2 EXAM 2025/2026 |ACTUAL COMPLETE ALL REAL
EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS ) | ALREADY GRADED A+ | LATEST EXAM .
NACE 2008 Student Manual!
START OF CHAPTER 1
If a watt-hour meter is used to determine the input power, the
following formula is used
A) AC input power = 3,600K N /T
B) AC input power = 2,600 K N /t
K = meter constant
N = number of revolutions
T= time in seconds of observation - ANSWER-a
If the efficiency is below what is expected or DC output voltage
is about half that expected, the following can be responsible:
I input voltage may be lower than it should be
II output voltage is too high for the rectifier rating
,III output voltage is too low for the rectifier rating
IV badly aged stacks
A) I, III, IV
B) II, III, IV
C) I, II, III
D) only I - ANSWER-a
____ are used to improve efficiency and for noise interference
control in the rectifiers
A) fuses
B) resistors
C) transformers
D) filters
E) diodes - ANSWER-d
In regards to rectifiers:
If the ___ is blown, replace it and turn on the rectifier. If the ___
blows again, the
____ is defective and should be replaced.
A) fuse, transformer, fuse
B) transformer, fuse, capacitor
,C) fuse, fuse, capacitor
D) capacitor, capacitor, fuse - ANSWER-c
In regards to rectifiers:
If AC voltage is present to the primary but not the secondary of
a transformer:
check to see whether there is an audible hum coming from the
transformer, if so, the
____ is operating, but the _____ is probably ____
A) primary, secondary, closed
B) secondary, primary, open
C) secondary, primary, open
D) primary, secondary, open - ANSWER-d
In regards to rectifier transformers:
The _____ winding should have generally less than one (1) Ω
resistance while the ____should have 1 to 10 Ω resistance.
A) secondary, primary
B) primary, secondary - ANSWER-a
True or false
, when trouble shooting silicon stacks, remove each diode and
check individually with a diode checker for forward and reverse
bias - ANSWER-t
In regards to the transformer in a rectifier:
If there is no output voltage or current, the_____
A) transformer is broken
B) fuse is blown
C) no AC input voltage - ANSWER-b
A functional diode in a stack will typically display a voltage
from ___ V to ___ V in the forward bias
A) 3, 9
B) 0.5, 1.0
C) 0.3, 0.9
D) 3, 6
E) "OL" (overload or out of limits) - ANSWER-c
In regards to a diode in a rectifier:
EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS ) | ALREADY GRADED A+ | LATEST EXAM .
NACE 2008 Student Manual!
START OF CHAPTER 1
If a watt-hour meter is used to determine the input power, the
following formula is used
A) AC input power = 3,600K N /T
B) AC input power = 2,600 K N /t
K = meter constant
N = number of revolutions
T= time in seconds of observation - ANSWER-a
If the efficiency is below what is expected or DC output voltage
is about half that expected, the following can be responsible:
I input voltage may be lower than it should be
II output voltage is too high for the rectifier rating
,III output voltage is too low for the rectifier rating
IV badly aged stacks
A) I, III, IV
B) II, III, IV
C) I, II, III
D) only I - ANSWER-a
____ are used to improve efficiency and for noise interference
control in the rectifiers
A) fuses
B) resistors
C) transformers
D) filters
E) diodes - ANSWER-d
In regards to rectifiers:
If the ___ is blown, replace it and turn on the rectifier. If the ___
blows again, the
____ is defective and should be replaced.
A) fuse, transformer, fuse
B) transformer, fuse, capacitor
,C) fuse, fuse, capacitor
D) capacitor, capacitor, fuse - ANSWER-c
In regards to rectifiers:
If AC voltage is present to the primary but not the secondary of
a transformer:
check to see whether there is an audible hum coming from the
transformer, if so, the
____ is operating, but the _____ is probably ____
A) primary, secondary, closed
B) secondary, primary, open
C) secondary, primary, open
D) primary, secondary, open - ANSWER-d
In regards to rectifier transformers:
The _____ winding should have generally less than one (1) Ω
resistance while the ____should have 1 to 10 Ω resistance.
A) secondary, primary
B) primary, secondary - ANSWER-a
True or false
, when trouble shooting silicon stacks, remove each diode and
check individually with a diode checker for forward and reverse
bias - ANSWER-t
In regards to the transformer in a rectifier:
If there is no output voltage or current, the_____
A) transformer is broken
B) fuse is blown
C) no AC input voltage - ANSWER-b
A functional diode in a stack will typically display a voltage
from ___ V to ___ V in the forward bias
A) 3, 9
B) 0.5, 1.0
C) 0.3, 0.9
D) 3, 6
E) "OL" (overload or out of limits) - ANSWER-c
In regards to a diode in a rectifier:
