ELECTRICAL ENGINEERING EXAM QUESTIONS

1. A high-pass T-connected symmetrical filter section has capacitances of 400 nF in each of its series arms and an inductance of 200mH in its shunt arm. The cut-off frequency of the filter is
(a) 398 Hz
(b) 1125 Hz
(c) 251 Hz
(d) 152 Hz

Answer: (a) 398 Hz

2. A low-pass T-connected symmetrical filter section is comprised of
(a) 98.65 μH in each series arm, 121.4 pF in shunt arm
(b) 49.34 μH in each series arm, 126.4 pF in shunt arm
(c) 98.68 μH in each series arm, 256.7 pF in shunt arm
(d) 49.34 μH in each series arm, 256.7 pF in shunt arm

Answer; (d) 49.34 μH in each series arm, 256.7 pF in shunt arm

3. A network designed to pass signals with all frequencies except those between two specified cut-off frequencies is called a
(a) low-pass filter
(b) band-stop filter
(c) band-stop pass filter
(d) high-pass filter

Answer: (b) band-stop filter

4. Which of the following is not a common form of data transmission
A. Amplitude modulation
B. Frequency modulation
C. Polarization modulation
D. Phase modulation

Answer: C. Polarization modulation

5. Which of the following is not characteristic of an oscillator?
A. Usefulness as a signal generator
B. Good output to input coupling
C. Reasonably high transistor gain
D. Negative feedback

6. When the bias in an FET stops the flow of current, the condition is called
A. Pinchoff 
B. Cutoff
C. Reverse bias
D. Avalanche

Answer: A. Pinchoff 

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