Microsoft Word - DE_Part_A_Spring 2009
pdf
keyboard_arrow_up
School
University of Maryland, Baltimore County *
*We aren’t endorsed by this school
Course
101
Subject
Electrical Engineering
Date
Apr 3, 2024
Type
Pages
12
Uploaded by nithyaparepally
Project Lead The Way, Inc. Copyright 2009 Page 2 of 13 Silver Brown Blue Orange Directions:
This is a CLOSED BOOK/CLOSED NOTES
exam. Select the letter of the response which best completes the item or answers the question. Then record your answer on the answer sheet provided for Part A.
1. If an integrated circuit has been damaged and you smell smoke, you should__________________. A. leave the power on while pulling out the damaged integrated circuit. C. push down on all the integrated circuits in the circuit with your finger. B. turn the power off for a few minutes before pulling out the damaged integrated circuit. D. turn up the power to twice the voltage before pulling out the damaged integrated circuit. 3. What is the value of the resistor shown below? A. 160 K Ω
±
10 % C. 360 Ω
±
10 % B. 360 Ω
±
5 % D. 36 K Ω
±
5 % 4. In a parallel circuit, you measure 1.5 mAmps flowing through a 600 Ω
resistor. What is the voltage drop across the resistor? A. 2.5 μ
Volts C. 400 m Volts B. 900 m Volts D. 0.900 m Volts 5. In a series circuit, you measure 9 volts across a 300 Ω
resistor. How much current is flowing through the resistor? A. 30 m Amps C. 300 m Amps B. 33.33 Amps D. 3 m Amps 2. After reading a digital meter, a technician obtained a reading of 0.0073 volts. Which of the following numbers is the proper engineering notation for that number? A. 7.3 m Volts C. 0.0073 μ
Volts B. 7.3 μ
Volts D. 7.3 K Volts
Project Lead The Way, Inc. Copyright 2009 Page 3 of 13 6. Which of the waveforms shown below is not
a digital waveform? A. Waveform A C. Waveform C B. Waveform B D. Waveform D 7. What is the binary equivalent to the decimal number 13
10
? A. 1101
2
C. 1011
2
B. 0111
2
D. 1001
2
8. What is the decimal equivalent to the binary number 010110
2
? A. 13
10
C. 23
10
B. 22
10
D. 42
10
9. What is the binary equivalent to the hexadecimal number C
H
? A. 1000
2
C. 1001
2
B. 0110
2
D. 1100
2
Project Lead The Way, Inc. Copyright 2009 Page 4 of 13 10. The truth-table shown below represents which of the following gates? X Y Z 0 0 0 0 1 1 1 0 1 1 1 1 A. Y
X
Z
C. Y
X
Z
B. Y
X
Z
D. Y
X
Z
11. The truth-table shown below represents which of the following gates? X Y Z 0 0 1 0 1 1 1 0 1 1 1 0 A. Y
X
Z
C. Y
X
Z
B. Y
X
Z
D. Y
X
Z
12. The truth-table shown below represents which of the following gates? X Y Z 0 0 1 0 1 0 1 0 0 1 1 0 A. Y
X
Z
C. Y
X
Z
B. Y
X
Z
D. Y
X
Z
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Project Lead The Way, Inc. Copyright 2009 Page 5 of 13 13. The gate shown to the right is represented by which of the following truth-tables? Y
X
Z
A. X Y Z 0 0 0 0 1 0 1 0 0 1 1 1 C. X Y Z 0
0
0
0 1 1 1 0 1 1 1 1 B. X Y Z 0 0 1 0 1 1 1 0 1 1 1 0 D. X Y Z 0
0
1
0 1 0 1 0 0 1 1 0 14. The gate shown to the right is represented by which of the following truth-tables? Y
X
Z
A. X Y Z 0 0 0 0 1 0 1 0 0 1 1 1 C. X Y Z 0 0 0 0 1 1 1 0 1 1 1 1 B. X Y Z 0 0 1 0 1 1 1 0 1 1 1 0 D. X Y Z 0
0
1
0 1 0 1 0 0 1 1 0 15. Which of the following is a rule of Boolean algebra? A. X
X
X
=
•
C. 0
X
X
=
+
B. X
X
X
=
•
D. 1
X
X
=
+
16. Which of the following is a rule of Boolean algebra? A. A
1
A =
+
C. 1
1
A =
+
B. 1
0
A =
+
D. 0
A
A =
+
Project Lead The Way, Inc. Copyright 2009 Page 6 of 13 17. Which of the following is the simplified equivalent for the Boolean equation shown? Y
X
Y
F
+
=
A. Y
X
F
=
C. Y
X
F
=
B. X
F
=
D. Y
F
=
18. Which of the following equations is the un-simplified Sum-Of-Products equation for the truth table shown? X Y Z F 0 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 1 1 1 1 0 A. Z
Y
X
Z
Y
X
Z
Y
X
F
+
+
=
C. Z
Y
X
Z
Y
X
Z
Y
X
F
+
+
=
B. Z
Y
X
Z
Y
X
Z
Y
X
F
+
+
=
D. Z
Y
X
Z
Y
X
Z
Y
X
F
+
+
=
19. Which of the following un-simplified Boolean expressions represent the logic circuit shown below? A. Z
Y
Z
Y
X
F
+
+
=
C. Z
Y
Z
Y
X
F
+
+
=
B. Z
Y
Z
Y
X
F
+
+
=
D. Z
Y
Z
Y
X
F
+
+
=
20. Which of the following is a correct DeMorgan’s Identity? A. Y
X
Y
X
•
=
•
C. Y
X
Y
X
+
=
•
B. Y
X
Y
X
•
=
•
D. Y
X
Y
X
+
=
•
Project Lead The Way, Inc. Copyright 2009 Page 7 of 13 21. Which of the following is the simplified equivalent for the Boolean equation shown? Y
X
F
+
=
A. Y
X
F
=
C. Y
X
F
=
B. Y
X
F
+
=
D. Y
X
F
=
22. Which of the following K-Maps has the 1’s & 0’s properly placed for the function F
20
? W
X Y Z F 0 0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 1 1 1 0 1 0 0 0 0 1 0 1 1 0 1 1 0 1 0 1 1 1 0 1 0 0 0 1 1 0 0 1 1 1 0 1 0 0 1 0 1 1 0 1 1 0 0 0 1 1 0 1 0 1 1 1 0 0 1 1 1 1 1 A. X
W
X
W
X
W
X
W
Z
Y
0 0 1 1 Z
Y
0 1 0 1 Z
Y 1 1 0 0 Z
Y 0 0 1 0 C.
X
W
X
W
X
W
X
W
Z
Y
0 0 1 0 Z
Y
0 1 1 0 Z
Y 1 0 0 1 Z
Y 1 1 0 0 B. X
W
X
W
X
W
X
W
Z
Y
0 0 0 1 Z
Y
0 1 0 1 Z
Y 1 1 0 0 Z
Y 1 0 1 0 D.
X
W
X
W
X
W
X
W
Z
Y
0 0 0 1 Z
Y
0 1 0 1 Z
Y 1 0 1 0 Z
Y 1 1 0 0
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Project Lead The Way, Inc. Copyright 2009 Page 8 of 13 23. Which of the following logic circuits correctly implements the Boolean equation?
Z
Y
Z
Y
F
+
=
A. C. B. D. 24. Which of the following K-maps is grouped properly and will result in the simplest solution? A. C. B. D. 25. Which Boolean equation is in Product-Of-Sums form? A. Z
Y
X
Y
X
Z
Y
X
F
+
+
=
C. Z)
Y
Z)(
Y)(X
(X
F
+
+
+
=
B. Y)
(X
Z
Z
Y
X
F
+
+
=
D. Z)
Y
Z)(
(Y
Z
X
F
+
+
=
26. Which of the following Boolean equation is in Sum-Of-Products form? A. C
A C
B
A
C
B
A
F
+
+
=
C. C)
B
C)(A A
)(
C
B
A
(
F
+
+
+
+
+
=
B. C)
B
(
A C
B
A
F
+
+
=
D. C)
B
(
A C)
(B
A
F
+
+
+
=
Project Lead The Way, Inc. Copyright 2009 Page 9 of 13 27. What logic values need to be placed on the inputs (a) through (g) of the common-
cathode seven segment in order to display the number 2? A. A B C D E F G 1 1 0 1 1 0 1 C. A B C
D
E F G 1 0 1 1 0 1 1 B. A B C D E F G 0 0 1 0 0 1 0 D. A B C D E F G 0 1 1 0 0 1 0 28. The gate shown below is represented by which of the following truth-tables? A. X Y Z 0 0 1 0 1 0 1 0 0 1 1 1 C. X Y Z 0 0 1 0 1 0 1 0 1 1 1 0 B. X Y Z 0 0 0 0 1 1 1 0 1 1 1 0 D. X Y Z 0 0 0 0 1 1 1 0 0 1 1 1
Project Lead The Way, Inc. Copyright 2009 Page 10 of 13 29. Which of the following circuits is a half-adder? A. C. B. D. 30. Which of the devices shown below is a Negative Edge Triggered D flip-flop? A. C. B. D. 31. How are the Q
and
Q
outputs of a flip flop affected by setting the active high asynchronous
PRESET input to a logic one? A. No change. C. 1
Q
and
0
Q
=
=
B. 0
Q
and
1
Q
=
=
D. 1
Q
and
1
Q
=
=
32. How are the Q
and
Q
outputs of a flip flop affected by setting the active low asynchronous
CLEAR input to a logic zero? A. No change. C. 1
Q
and
0
Q
=
=
B. 0
Q
and
1
Q
=
=
D. 1
Q
and
1
Q
=
=
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Project Lead The Way, Inc. Copyright 2009 Page 11 of 13 33. Regardless of its current value, what will happen to the output QUE
on the next clock pulse? A. QUE will be low. C. QUE will toggle. B. QUE will be high. D. QUE will not change. 34. For the single flip-flop shown below, what will the output Q be on the next clock pulse? A. Q will be high. C. Q will toggle. B. Q will be low. D. Q will not change. 35. Determine the output frequency for the circuit shown to the right. A. 150 Hz. C. 300 Hz. B. 600 Hz. D. 450 Hz.
Project Lead The Way, Inc. Copyright 2009 Page 12 of 13 36. What is the minimum number of flip-flops needed to build a Mod-10 Asynchronous counter? A. 3 C. 4 B. 5 D. 10 37. Which of the following statements applies to asynchronous counters? A. Asynchronous counters are faster than synchronous counters. C. All the flip-flops in an Asynchronous counter are clocked at the same time by a common external clock. B. Asynchronous counters require more power than synchronous counters. D. Asynchronous counters are also called ripple counters. 38. What is the count range of the 3-bit asynchronous shown to the right? A. 1 to 6 C. 1 to 5 B. 6 down to 11 D. 5 down to 1 39. When comparing TTL logic gates to CMOS gates, which of the following statements is true? A. CMOS gates use more
power than TTL gates. C. CMOS gates are more
sensitive to static electricity than TTL gates. B. CMOS gates are faster
than TTL gates. D. CMOS gates have a lower
margin than TTL gates.
Project Lead The Way, Inc. Copyright 2009 Page 13 of 13 40. Propagation delay is _________________________. A. a measure of the ability of a logic gate to drive further logic gates. C. the difference between what a logic gate outputs as a valid logic voltage and what the input of the next gates expects to see as a valid logic voltage. B. the difference in chip temperature from when the power is off to when the power is on. D. the time required for a signal to travel from the input of a logic gate to the output.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Related Documents
Related Questions
Four electricians are discussing wiring under raised floors in information technology equipment rooms. Electrician A says that wiring under the raised floor requires fire-resistant walls, floors, and ceilings between other occupancies. Electrician B says that wiring under the raised floor requires fire resistant halfway up the walls and floors between other occupancies. Electrician C says that the room must employ a disconnecting means that removes half of the power to all equipment in the room. Electrician D says that a disconnecting means isn't necessary for the room. Which of the following statements is correct?
A. Electrician B is correct.
B. Electrician D is correct.
C. Electrician A is correct.
D. Electrician C is correct.
arrow_forward
The system having ±0.5% of F.S.D if the full scale deflection is 50 units, then accuracy is _____
a. ±0.25
b. ±1
c. ±0
d. ±0.5
arrow_forward
schedules are typically provided to detail the circuits and overcurrent protection required for
listribution equipment.
Branch-circuit
- Outlet
C.
d.
ore distribution points for electrical in ....
Switch
Panelboard
arrow_forward
A computer's power supply converts mains AC to low-voltage regulated DC power for the internal components of a computer. You are building a new computer. You are deciding which type of power supply to install.
Which of the following definitions BEST describes a valid type of power supply?
Correct Answer:
A single-rail power supply provides one rail (PCB trace). This provides the best safety for the computer by providing a single point of shutdown in the event of a short circuit.
Correct Answer:
A single-rail power supply provides one rail (PCB trace) used to always provide equal wattage to all devices attached to the power supply.
Correct Answer:
A dual-rail power supply provides separate rails (PCB traces) used to provide equal wattage to the devices attached to each rail.
Correct Answer:
A dual-rail power supply provides separate rails (PCB traces) used to balance the power load between multiple circuits, which prevents any one circuit from becoming overloaded.
arrow_forward
Q4. Explain the operating principle of the circuit breaker and list the merits and demerits of the
following circuit breakers: (10 Mark)
(i) Air circuit breaker
(ii) Oil circuit breaker
(iii) SF6 circuit breaker
(iv) Vacuum circuit breaker
arrow_forward
Please answer with detail and how it is done. Photo is attached with the questions.
arrow_forward
Centennial College - School of Engineering Technology - Toronto
ELECTRONICS SHOP PRACTICES
CHAPTER 7: SOLDERING TECHNIQUES
7,5 QUESTIONS
1. Which tools will you need for soldering?
2. What type of solder do we call the Eutectic Solder?
3. If the
temperature is too high, the
is bellow required, the solder joint will appear cold and silvery and will be
of the contact may occur and circuit will not work.
If the
4.
A long and sharp
will be of little use when soldering
wires or
5. The iron should have a
tip to prevent
and should have a wattage rating of
to
Watts.
6.
When soldering, apply heat
solder will
to both, the component lead and
much more readily over the
copper pad so that the
7. Keep the soldering iron tip and working surfaces
wipe only before using and
immediately.
8. Do not
solder from a heated tip before
off the iron.
alternate applying
the surface.
9. If tips become
and wiping to
being used.
10. Periodically.
the tip from your tool and
with a suitable cleaner for
your skills.…
arrow_forward
After reduction, the current - caring capacity of a condenser is referred to as the___.
A. ambience b. Allowable ampacity c. ampacity d. ambient rating
arrow_forward
Estimate the length of conduit to perform the next bends. EMT will be bend using a hand
bender. Provide your answer in inches (just the number) using up to 2 decimals.
The picture shows two panels connected by a back-to-back
23.5" stubs
EMT 3/4"
6.25 ft
P
arrow_forward
Raceway fill calculations are a prerequisite in ____ needed for particular circuits.
Select one:
A. MATERIAL REQUIREMENTS
B. SCHEMATIC REQUIREMENTS
C. DETERMINING THE SIZE OF RACEWAY
D. CIRCUIT LOADS
arrow_forward
1. A standard incandescent dimmer can be used to control which of the following loads?
c. either a or b
d. neither a nor b
a. a low-voltage lighting transformer
b. incandescent lighting
2. Negative battery terminals are generally have a
a. red
A19
GFCI
WP
XP H
#
$$3
BE
$3$F$
|||
color marking.
b. black
|||
b. lead-acid
4. Ceiling-suspended (paddle) fan speed can be controlled by
a. pull chain on the fan
b. speed control mounted in a wall box.
Figure 116.109
3. Refer to Figure 116.109. The three-way switch to the left of the sliding doors controls
a. the ceiling fan
c. the exterior light fixture
b. the exterior WP GFCI receptacle
d. the four split-wired receptacles
冊
|||
c. remote-control similar to TV/VCR type
d. any of these
5. A storage battery is comprised of one or more rechargeable cells of the
electrochemical types.
a. nickel-cadmium
c. either a or b.
or other rechargeable
d. neither a nor b
arrow_forward
The circuit breaker cubicles illustrated in your reading material each contain____circuit breakers.
A. Two B. Three C. Four D. Six
arrow_forward
1. A14/2 type copper used for a general lighting branch circuit. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 2.Three 8 AWG copper conductors with THHN insulation Installed in garage in electrical metallic tubing (EMT). The ambient temperature in the garage can reach as high as 110'F. All termination points for this circuit are rated 60'C. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 3.Four 4 AWG copper conductor with THWN insulation imstalled in EMT in a basement. All termination points are rated at 60'C.
Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 4. An 8/3 Type UF copper cable installed underground from a house to a detached garage to feed a 120/240-volt subpanel. All termination points are rated at 60'C.…
arrow_forward
Suppose the current in this circuit is I = -35 A. The voltage drop across each circuit element is as given in the table below. From this information, determine, for each of these circuit elements,
(i) whether an active or passive sign convention is being used for that element,
(ii) whether that element is absorbing or producing a net (positive) amount of electrical power.
In each answer box within the table below, type the correct choice from among the bold-faced words above.
-
A
A
B
C
A
+
с
B
+ V₂
Circuit element Voltage drop Sign convention? Absorbing or producing net electrical power?
-5 V
-6 V
1 V
-
arrow_forward
Electrical plants
Define the terms "Main column ." " Line ." " Protection earth " and "
Operating earth
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
EBK ELECTRICAL WIRING RESIDENTIAL
Electrical Engineering
ISBN:9781337516549
Author:Simmons
Publisher:CENGAGE LEARNING - CONSIGNMENT
Related Questions
- Four electricians are discussing wiring under raised floors in information technology equipment rooms. Electrician A says that wiring under the raised floor requires fire-resistant walls, floors, and ceilings between other occupancies. Electrician B says that wiring under the raised floor requires fire resistant halfway up the walls and floors between other occupancies. Electrician C says that the room must employ a disconnecting means that removes half of the power to all equipment in the room. Electrician D says that a disconnecting means isn't necessary for the room. Which of the following statements is correct? A. Electrician B is correct. B. Electrician D is correct. C. Electrician A is correct. D. Electrician C is correct.arrow_forwardThe system having ±0.5% of F.S.D if the full scale deflection is 50 units, then accuracy is _____ a. ±0.25 b. ±1 c. ±0 d. ±0.5arrow_forwardschedules are typically provided to detail the circuits and overcurrent protection required for listribution equipment. Branch-circuit - Outlet C. d. ore distribution points for electrical in .... Switch Panelboardarrow_forward
- A computer's power supply converts mains AC to low-voltage regulated DC power for the internal components of a computer. You are building a new computer. You are deciding which type of power supply to install. Which of the following definitions BEST describes a valid type of power supply? Correct Answer: A single-rail power supply provides one rail (PCB trace). This provides the best safety for the computer by providing a single point of shutdown in the event of a short circuit. Correct Answer: A single-rail power supply provides one rail (PCB trace) used to always provide equal wattage to all devices attached to the power supply. Correct Answer: A dual-rail power supply provides separate rails (PCB traces) used to provide equal wattage to the devices attached to each rail. Correct Answer: A dual-rail power supply provides separate rails (PCB traces) used to balance the power load between multiple circuits, which prevents any one circuit from becoming overloaded.arrow_forwardQ4. Explain the operating principle of the circuit breaker and list the merits and demerits of the following circuit breakers: (10 Mark) (i) Air circuit breaker (ii) Oil circuit breaker (iii) SF6 circuit breaker (iv) Vacuum circuit breakerarrow_forwardPlease answer with detail and how it is done. Photo is attached with the questions.arrow_forward
- Centennial College - School of Engineering Technology - Toronto ELECTRONICS SHOP PRACTICES CHAPTER 7: SOLDERING TECHNIQUES 7,5 QUESTIONS 1. Which tools will you need for soldering? 2. What type of solder do we call the Eutectic Solder? 3. If the temperature is too high, the is bellow required, the solder joint will appear cold and silvery and will be of the contact may occur and circuit will not work. If the 4. A long and sharp will be of little use when soldering wires or 5. The iron should have a tip to prevent and should have a wattage rating of to Watts. 6. When soldering, apply heat solder will to both, the component lead and much more readily over the copper pad so that the 7. Keep the soldering iron tip and working surfaces wipe only before using and immediately. 8. Do not solder from a heated tip before off the iron. alternate applying the surface. 9. If tips become and wiping to being used. 10. Periodically. the tip from your tool and with a suitable cleaner for your skills.…arrow_forwardAfter reduction, the current - caring capacity of a condenser is referred to as the___. A. ambience b. Allowable ampacity c. ampacity d. ambient ratingarrow_forwardEstimate the length of conduit to perform the next bends. EMT will be bend using a hand bender. Provide your answer in inches (just the number) using up to 2 decimals. The picture shows two panels connected by a back-to-back 23.5" stubs EMT 3/4" 6.25 ft Parrow_forward
- Raceway fill calculations are a prerequisite in ____ needed for particular circuits. Select one: A. MATERIAL REQUIREMENTS B. SCHEMATIC REQUIREMENTS C. DETERMINING THE SIZE OF RACEWAY D. CIRCUIT LOADSarrow_forward1. A standard incandescent dimmer can be used to control which of the following loads? c. either a or b d. neither a nor b a. a low-voltage lighting transformer b. incandescent lighting 2. Negative battery terminals are generally have a a. red A19 GFCI WP XP H # $$3 BE $3$F$ ||| color marking. b. black ||| b. lead-acid 4. Ceiling-suspended (paddle) fan speed can be controlled by a. pull chain on the fan b. speed control mounted in a wall box. Figure 116.109 3. Refer to Figure 116.109. The three-way switch to the left of the sliding doors controls a. the ceiling fan c. the exterior light fixture b. the exterior WP GFCI receptacle d. the four split-wired receptacles 冊 ||| c. remote-control similar to TV/VCR type d. any of these 5. A storage battery is comprised of one or more rechargeable cells of the electrochemical types. a. nickel-cadmium c. either a or b. or other rechargeable d. neither a nor barrow_forwardThe circuit breaker cubicles illustrated in your reading material each contain____circuit breakers. A. Two B. Three C. Four D. Sixarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- EBK ELECTRICAL WIRING RESIDENTIALElectrical EngineeringISBN:9781337516549Author:SimmonsPublisher:CENGAGE LEARNING - CONSIGNMENT
EBK ELECTRICAL WIRING RESIDENTIAL
Electrical Engineering
ISBN:9781337516549
Author:Simmons
Publisher:CENGAGE LEARNING - CONSIGNMENT