RCDD TEST COMPREHENSIVE SCRIPT 2026
FULL ANSWERS GRADED A+
⩥ B.
Answer: As a guide, the recommended maximum AC current value on
any bonding conductor should be less than ________ amperes.
A. 0.50
B. 1
C. 5
D. 10
E. 20
⩥ C.
Answer: Certain systems must exist relative to bonding and grounding at
every site. Which of the following is NOT one such system?
A. AC grounding electrode system (e.g., in some countries it may also
be known as the earthing system)
B. Telecommunications bonding infrastructure
C. Lightning protection system
D. Equipment grounding system (e.g., in some countries it may also be
known as the equipment bonding system)
,⩥ B.
Answer: Which of the following electrical devices is used to convert AC
to DC?
A. Inverter
B. Rectifier
C. Transformer
D. Line filter
⩥ C.
Answer: You have been asked to provide a UPS that is always serving
the load from its batteries and the electrical supply is used only to
recharge the batteries. Which one of the following types of UPS will
meet this requirement?
A. Off line, standby
B. Line interactive
C. Online double conversion
D. Rotary
E. Flywheel
⩥ C.
Answer: A rapid increase in voltage with a duration of half a cycle best
describes a(n):
A. Swell
,B. Overvoltage
C. Transient
D. Frequency variation
⩥ C.
Answer: An isolated ground is used to:
A. Reduce transients
B. Prevent interruptions
C. Reduce EMI/RFI
D. Reduce swells and sags
⩥ C.
Answer: Multiples of the basic frequency of an electrical waveform are
called:
A. Transients
B. Noise inductions
C. Harmonics
D. Random frequency variations
⩥ D.
Answer: The formula for calculating BTUs from electrical power is:
A. W x 0.707
, B. W x 1.732
C. W x 3.1416
D. W x 3.413
⩥ D.
Answer: All of the following are used to control static discharge
EXCEPT:
A. Ion generator
B. Discharge plates and bracelets
C. Maintenance of humidity of between 30 and 55 percent
D. Installation of isolated grounds
⩥ B.
Answer: The average power consumption in a telecommunications room
(TR) is 2260 watts per hour. What is the heat dissipation in BTUs?
A. 7096 BTU
B. 7713 BTU
C. 8104 BTU
D. 8511 BTU
⩥ B.
Answer: Using Ohms law, a circuit of 120 volts and a resistance of 15
ohms will have a current of________ amps.
FULL ANSWERS GRADED A+
⩥ B.
Answer: As a guide, the recommended maximum AC current value on
any bonding conductor should be less than ________ amperes.
A. 0.50
B. 1
C. 5
D. 10
E. 20
⩥ C.
Answer: Certain systems must exist relative to bonding and grounding at
every site. Which of the following is NOT one such system?
A. AC grounding electrode system (e.g., in some countries it may also
be known as the earthing system)
B. Telecommunications bonding infrastructure
C. Lightning protection system
D. Equipment grounding system (e.g., in some countries it may also be
known as the equipment bonding system)
,⩥ B.
Answer: Which of the following electrical devices is used to convert AC
to DC?
A. Inverter
B. Rectifier
C. Transformer
D. Line filter
⩥ C.
Answer: You have been asked to provide a UPS that is always serving
the load from its batteries and the electrical supply is used only to
recharge the batteries. Which one of the following types of UPS will
meet this requirement?
A. Off line, standby
B. Line interactive
C. Online double conversion
D. Rotary
E. Flywheel
⩥ C.
Answer: A rapid increase in voltage with a duration of half a cycle best
describes a(n):
A. Swell
,B. Overvoltage
C. Transient
D. Frequency variation
⩥ C.
Answer: An isolated ground is used to:
A. Reduce transients
B. Prevent interruptions
C. Reduce EMI/RFI
D. Reduce swells and sags
⩥ C.
Answer: Multiples of the basic frequency of an electrical waveform are
called:
A. Transients
B. Noise inductions
C. Harmonics
D. Random frequency variations
⩥ D.
Answer: The formula for calculating BTUs from electrical power is:
A. W x 0.707
, B. W x 1.732
C. W x 3.1416
D. W x 3.413
⩥ D.
Answer: All of the following are used to control static discharge
EXCEPT:
A. Ion generator
B. Discharge plates and bracelets
C. Maintenance of humidity of between 30 and 55 percent
D. Installation of isolated grounds
⩥ B.
Answer: The average power consumption in a telecommunications room
(TR) is 2260 watts per hour. What is the heat dissipation in BTUs?
A. 7096 BTU
B. 7713 BTU
C. 8104 BTU
D. 8511 BTU
⩥ B.
Answer: Using Ohms law, a circuit of 120 volts and a resistance of 15
ohms will have a current of________ amps.
