CETA EXAMS CORRECT ANSWERS AND QUESTIONS
SET A+
✔✔In a capacitive circuit, what is the voltage and current relationship?
A.
Current lags
B.
Voltage lags
C.
Resistance leads
D.
Voltage leads - ✔✔B.
Voltage lags
✔✔.
When the frequency of an applied voltage is increased the capacitive reactance of a
circuit will:
A.
decrease.
B.
increase.
C.
stay unchanged.
D.
short all capacitors to ground. - ✔✔A.
decrease.
✔✔What is the difference between calculating impedance for a series AC circuit and a
parallel AC circuit?
A.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive current divided into the source
current
,B.
A series impedance calculation is derived from resistance and reactance, while parallel
impedance is calculated with resistive and reactive current divided into the source
voltage
C.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive current divided into the source
voltage
D.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive voltage divided into the source
current - ✔✔D.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive voltage divided into the source
current
✔✔Each type of coaxial cable is designed with_____________, which is dependent on
materials and dimensions used.
A.
characteristic impedance
B.
standing waves
C.
transverse impedance
D.
skin effect - ✔✔A.
characteristic impedance
✔✔A coaxial cable's velocity of propagation factor depends on what two factors?
A.
Dielectric constant and permeability
B.
Radio frequency interference and permeability
C.
Common mode current reflection and permeability
D.
Trans-induction and dielectric constant - ✔✔A.
Dielectric constant and permeability
✔✔In a series resistive and reactive circuit what formula is used to find total
impedance?
A.
Z = X2 (R2/2)
B.
Z =sqrt( R2 + X2)
C.
, Z =R2 ( X2/2)
D.
Z =sqrt( R2 + X2)/2 - ✔✔B.
Z =sqrt( R2 + X2)
✔✔Silicon diodes have an approximate voltage drop of:
A.
.3V
B.
.7V
C.
1.414V
D.
.9V - ✔✔B.
.7V
✔✔In regards to AWG standards, which gauge of wire has a bigger cross-sectional
area?
A.
16 AWG
B.
18 AWG
C.
20 AWG
D.
24 AWG - ✔✔A.
16 AWG
✔✔What is a primary advantage of a FET when compared to the bipolar transistor?
A.
High input impedance
B.
Low input impedance
C.
Gate biasing is resistive controlled
D.
No advantage - ✔✔A.
High input impedance
✔✔Zener diodes are designed to operate in the _____ bias region.
A.
forward
B.
depletion
C.
SET A+
✔✔In a capacitive circuit, what is the voltage and current relationship?
A.
Current lags
B.
Voltage lags
C.
Resistance leads
D.
Voltage leads - ✔✔B.
Voltage lags
✔✔.
When the frequency of an applied voltage is increased the capacitive reactance of a
circuit will:
A.
decrease.
B.
increase.
C.
stay unchanged.
D.
short all capacitors to ground. - ✔✔A.
decrease.
✔✔What is the difference between calculating impedance for a series AC circuit and a
parallel AC circuit?
A.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive current divided into the source
current
,B.
A series impedance calculation is derived from resistance and reactance, while parallel
impedance is calculated with resistive and reactive current divided into the source
voltage
C.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive current divided into the source
voltage
D.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive voltage divided into the source
current - ✔✔D.
A series impedance calculation is derived from current and reactance, while parallel
impedance is calculated with resistive and reactive voltage divided into the source
current
✔✔Each type of coaxial cable is designed with_____________, which is dependent on
materials and dimensions used.
A.
characteristic impedance
B.
standing waves
C.
transverse impedance
D.
skin effect - ✔✔A.
characteristic impedance
✔✔A coaxial cable's velocity of propagation factor depends on what two factors?
A.
Dielectric constant and permeability
B.
Radio frequency interference and permeability
C.
Common mode current reflection and permeability
D.
Trans-induction and dielectric constant - ✔✔A.
Dielectric constant and permeability
✔✔In a series resistive and reactive circuit what formula is used to find total
impedance?
A.
Z = X2 (R2/2)
B.
Z =sqrt( R2 + X2)
C.
, Z =R2 ( X2/2)
D.
Z =sqrt( R2 + X2)/2 - ✔✔B.
Z =sqrt( R2 + X2)
✔✔Silicon diodes have an approximate voltage drop of:
A.
.3V
B.
.7V
C.
1.414V
D.
.9V - ✔✔B.
.7V
✔✔In regards to AWG standards, which gauge of wire has a bigger cross-sectional
area?
A.
16 AWG
B.
18 AWG
C.
20 AWG
D.
24 AWG - ✔✔A.
16 AWG
✔✔What is a primary advantage of a FET when compared to the bipolar transistor?
A.
High input impedance
B.
Low input impedance
C.
Gate biasing is resistive controlled
D.
No advantage - ✔✔A.
High input impedance
✔✔Zener diodes are designed to operate in the _____ bias region.
A.
forward
B.
depletion
C.
