Kansas Electrical Engineer Examination
Advanced 100-Question Practice Exam
2026 | Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1.
A balanced three-phase, 480 V line-to-line system supplies a balanced load of 60
kW at 0.80 power factor lagging. What is the approximate line current?
A. 72.2 A
B. 90.2 A
C. 100.0 A
D. 112.7 A
Answer: 90.2 A
Rationale: For a balanced three-phase system, P=3VLILpf. Thus IL=60,000/(3
×480×0.80)≈90.2 A.
,2.
A 13.8 kV, three-phase generator has a synchronous reactance of 1.2 pu and
negligible resistance. If its internal generated voltage is 1.10 pu and terminal
voltage is 1.00 pu, what is the approximate reactive power supplied under the
simplified cylindrical-rotor model when the power angle is determined from the
real-power condition?
A. 0.42 pu
B. 0.63 pu
C. 0.83 pu
D. 1.10 pu
Answer: 0.83 pu
Rationale: For a lossless generator, P=EV/Xsinδ. For a typical real-power loading
near 0.75 pu, the resulting angle gives Q=(EV/X)cosδ−V2/X, approximately 0.83
pu.
3.
A 240 V single-phase load consumes 12 kW at 0.75 power factor lagging. What
capacitor reactive power is approximately required to improve the power factor
to 0.95?
A. 3.1 kVAR
B. 4.2 kVAR
C. 5.0 kVAR
D. 6.7 kVAR
Answer: 5.0 kVAR
,Rationale: Initial reactive power is Q1=Ptan(cos−10.75)≈8.82 kVAR. Final
reactive power is Q2=12tan(cos−10.95)≈3.94 kVAR. The capacitor must supply
approximately 8.82−3.94=4.88 kVAR.
4.
For a second-order RLC circuit, the damping ratio is increased while the natural
frequency remains unchanged. Which response characteristic is most directly
affected?
A. Final-value gain only
B. Oscillation amplitude and settling behavior
C. DC source magnitude
D. Circuit topology
Answer: Oscillation amplitude and settling behavior
Rationale: Increasing damping reduces overshoot and oscillatory behavior and
generally changes settling characteristics, while the natural frequency can
remain unchanged if the circuit parameters are adjusted appropriately.
5.
A 4-pole induction motor operates from a 60 Hz supply at a slip of 0.04. What is
the rotor mechanical speed?
A. 1,728 rpm
B. 1,800 rpm
C. 1,872 rpm
D. 3,456 rpm
Answer: 1,728 rpm
, Rationale: Synchronous speed is Ns=120f/P=1,800 rpm. Rotor speed is N=(1−s)Ns
=0.96(1,800)=1,728 rpm.
6.
A 60 Hz transformer has 500 primary turns and 100 secondary turns. If the
primary is supplied with 2,400 V rms, what is the ideal secondary voltage?
A. 120 V
B. 240 V
C. 480 V
D. 1,200 V
Answer: 480 V
Rationale: The ideal transformer ratio is V2/V1=N2/N1=100/500=0.2. Therefore
V2=2,400(0.2)=480 V.
7.
A balanced positive-sequence three-phase voltage set is applied to a delta-
connected balanced load. Which statement is correct?
A. Line voltage is always 1/√3 times phase voltage
B. Line current equals phase current
C. Phase voltage equals line voltage
D. The load cannot consume reactive power
Answer: Phase voltage equals line voltage
Rationale: In a delta connection, each load impedance is directly connected
across a line-to-line voltage, so Vϕ=VL.
Advanced 100-Question Practice Exam
2026 | Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1.
A balanced three-phase, 480 V line-to-line system supplies a balanced load of 60
kW at 0.80 power factor lagging. What is the approximate line current?
A. 72.2 A
B. 90.2 A
C. 100.0 A
D. 112.7 A
Answer: 90.2 A
Rationale: For a balanced three-phase system, P=3VLILpf. Thus IL=60,000/(3
×480×0.80)≈90.2 A.
,2.
A 13.8 kV, three-phase generator has a synchronous reactance of 1.2 pu and
negligible resistance. If its internal generated voltage is 1.10 pu and terminal
voltage is 1.00 pu, what is the approximate reactive power supplied under the
simplified cylindrical-rotor model when the power angle is determined from the
real-power condition?
A. 0.42 pu
B. 0.63 pu
C. 0.83 pu
D. 1.10 pu
Answer: 0.83 pu
Rationale: For a lossless generator, P=EV/Xsinδ. For a typical real-power loading
near 0.75 pu, the resulting angle gives Q=(EV/X)cosδ−V2/X, approximately 0.83
pu.
3.
A 240 V single-phase load consumes 12 kW at 0.75 power factor lagging. What
capacitor reactive power is approximately required to improve the power factor
to 0.95?
A. 3.1 kVAR
B. 4.2 kVAR
C. 5.0 kVAR
D. 6.7 kVAR
Answer: 5.0 kVAR
,Rationale: Initial reactive power is Q1=Ptan(cos−10.75)≈8.82 kVAR. Final
reactive power is Q2=12tan(cos−10.95)≈3.94 kVAR. The capacitor must supply
approximately 8.82−3.94=4.88 kVAR.
4.
For a second-order RLC circuit, the damping ratio is increased while the natural
frequency remains unchanged. Which response characteristic is most directly
affected?
A. Final-value gain only
B. Oscillation amplitude and settling behavior
C. DC source magnitude
D. Circuit topology
Answer: Oscillation amplitude and settling behavior
Rationale: Increasing damping reduces overshoot and oscillatory behavior and
generally changes settling characteristics, while the natural frequency can
remain unchanged if the circuit parameters are adjusted appropriately.
5.
A 4-pole induction motor operates from a 60 Hz supply at a slip of 0.04. What is
the rotor mechanical speed?
A. 1,728 rpm
B. 1,800 rpm
C. 1,872 rpm
D. 3,456 rpm
Answer: 1,728 rpm
, Rationale: Synchronous speed is Ns=120f/P=1,800 rpm. Rotor speed is N=(1−s)Ns
=0.96(1,800)=1,728 rpm.
6.
A 60 Hz transformer has 500 primary turns and 100 secondary turns. If the
primary is supplied with 2,400 V rms, what is the ideal secondary voltage?
A. 120 V
B. 240 V
C. 480 V
D. 1,200 V
Answer: 480 V
Rationale: The ideal transformer ratio is V2/V1=N2/N1=100/500=0.2. Therefore
V2=2,400(0.2)=480 V.
7.
A balanced positive-sequence three-phase voltage set is applied to a delta-
connected balanced load. Which statement is correct?
A. Line voltage is always 1/√3 times phase voltage
B. Line current equals phase current
C. Phase voltage equals line voltage
D. The load cannot consume reactive power
Answer: Phase voltage equals line voltage
Rationale: In a delta connection, each load impedance is directly connected
across a line-to-line voltage, so Vϕ=VL.
