1.
The main purpose of an instrumentation amplifier is _____.
a.
To compare input signals.
b.
To amplify small signals that are riding on large
common mode voltages.
c.
To reject unwanted signals.
d.
To trim small signals that are riding on large common
mode voltages.
2.
In a series RLC circuit, what is the condition of the
circuit if there is high impedance, low current, and low reactance voltages?
a.
Ideal circuit
b.
Percent circuit
c.
Resonant
d.
Non-resonant
3.
The most accurate type of test equipment used for
measuring high power is the _____.
a.
Bolometer
b.
Wavemeter
c.
Calorimeter
d.
Wattmeter
4.
The effect on the human body of 21-20 mill-amperes, 60
Hz A.C. or 80-?? milli-amperes D.C is ______.
a.
Respiratory failure
b.
Mascular inhibition
c.
Reflex action
d.
Surprise
5.
A straight line plot of collector current Ic and Vce
for a transistor circuit is called the _____.
a.
Threshold line
b.
DC loadline
c.
Loading limit
d.
Linear level
6.
If a transformer has a turns ratio of 1:3, what is the
current ratio?
a.
1:3
b.
1:9
c.
3:1
d.
9:1
7.
There is a _____ degrees of inversion between gate and
drain voltages of an FET.
a.
Zero
b.
90
c.
180
d.
270
8.
A differential circuit uses a _____.
a.
Capacitor in its feedback circuit
b.
RLC in its feedback circuit
c.
Inductor in its feedback circuit
d.
Resistor in its feedback circuit.
9.
Which of the following shells contain 2 electrons?
a.
L
b.
N
c.
M
d.
K
10.
What amplifier is used when power from a convertion
servoamplifier is too small to drive large servomotors (either A.C or D.C.)?
a.
Differential amplifier
b.
RD amplifier
c.
Audio amplifier
d.
Operational amplifier
11.
An amplifier which is designed to be used with other
circuit component to perform either computing functions or some type of
transfer operation?
a.
Differential amplifier
b.
RD Amplifier
c.
Audio amplifier
d.
Operational amplifier
12.
What type of LC oscillator is sometimes called a
“tickler” oscillator in reference to the transformer secondary or tickler coil
that provides the feedback to keep the oscillator going?
a.
Colpitts
b.
Clapp
c.
Armstrong
d.
Hartley
13.
The ratio of the DC collector current Ic to the emitter
current Ie is called the DC ______.
a.
Delta
b.
Beta (Bdc)
c.
Echo
d.
Alpha (Adc)
14.
The effect of 60 Hz A.C. over 100 mA or DC over 300 mA
on the human body.
a.
Mascular inhibition
b.
Respiratory failure
c.
Surprise
d.
Usually fatal
15.
The bit storage capacity of a Read Only Memory(ROM)
with a 512 x 8 organization is _____ bits.
a.
1024
b.
8192
c.
4096
d.
2048
16.
The device used to produce a gradual chance of
impedance at the end of a waveguide is called a _____.
a.
Funnel
b.
Load
c.
Dummy
d.
Horn
17.
In a robots, he axis that allows rotation are often
referred to as _____ joints
a.
Revolving
b.
Revolute
c.
Resolute
d.
Rotary
18.
The most widely used combination bias system in basic
transistor amplifier
a.
Limited type
b.
Current divider type
c.
Voltage-divider type
d.
Base current type
19.
The open-loop gain of an op-amp is given at 225,000. Find
the gain in dB.
a.
1070
b.
107
c.
214
d.
10.7
20.
A _____ is a solid material formed by atoms bonding
together in a fixed pattern.
a.
Block
b.
Crystal
c.
Lattice
d.
Pyramid
21.
Elements with 5 or more valence electrons are called
_____.
a.
Semi-conductors
b.
Conductors
c.
Molecule
d.
Insulators
22.
When the resistance of the load is high with respect to
the resistance of the source _____ in a circuit is achieved.
a.
Maximum power
b.
High efficiency
c.
Maximum transfer
d.
High voltage
23.
As the input voltage varies within specified limits,
the zener diode maintains a nearly constant output voltage across its terminal.
This is called _____.
a.
Auto regulation
b.
Specific regulation
c.
Line regulation
d.
Load regulation
24.
The method of assigning more sectors to the outer disk
tracks is referred to as _____ recording.
a.
Random
b.
Zone
c.
Sector
d.
System
25.
_____ is the unit of electrical current flow.
a.
Volt
b.
Ohm
c.
Amepere
d.
Watt
26.
According to Ohm’s Law, what happens to the circuit
current if the circuit resistance increases?
a.
Current double
b.
Current decreases
c.
Current increases
d.
Current remains constant
27.
Determine the open loop gain of an Op-am whose cur-off
frequency is 100 Hz with a midrange voltage gain of 100,000.
a.
7,071
b.
707.1
c.
70,710
d.
70.71
28.
DC biasing is used to establish a steady level of
transistor current. This is called the _____.
a.
Operating coordinates
b.
Threshold point
c.
Range of operation
d.
DC operating point
29.
Arc blow can be avoided in electrical welding by _____
a.
Increasing arc length
b.
Welding away from the earth ground connection
c.
Using bare electrodes
d.
Using AC welding machines
30.
The distance covered or traveled by a waveform during
the time interval of one complete cycle.
a.
Frequency
b.
Wavelength
c.
Time slot
d.
Wave time
31.
_____ is the non-linear distortion characterized by the
appearance (at the system output)_ of frequencies equal to the sums or
difference of two or more frequencies at the input.
a.
Differential distortion
b.
Inter modulation distortion
c.
Mutual distortion
d.
Modulated distortion
32.
Find the phase angle between the voltage across and the
current through the circuit when Xc is 25 ohms, R 100 ohms and Xl is 50 ohms.
a.
76 degrees with the voltage leading the current
b.
14 degrees with the voltage lagging the current
c.
14 degrees with the voltage leading the current
d.
76 degrees with the voltage lagging the current
33.
If the resistance of a circuit is doubled and the
applied voltage is kept constant, the current will _____.
a.
Be quadrupled
b.
Remain the same
c.
Be cut in half
d.
Be doubled
34.
To produce tin film resistors, which of the following
materials is the most widely used?
a.
Titanium
b.
Tantalum
c.
Nichrome
d.
Chromium cermets
35.
Which of the following are techniques used to eliminate
bonding wire and to improve packaging in IC production?
a.
Flip chips
b.
Beam lead chips
c.
Flat pack
d.
DIP
i.
A,B, and C only
ii.
A and C only
iii.
A and B only
iv.
A,B,C, and D
36.
List the two advantages of a voltage divider in DC
biasing
a.
Unstable, uses two supply voltages
b.
Unstable, uses one supply voltage
c.
Stable, uses one supply voltages
d.
Stable, uses two supply voltages
37.
_____ is a kind of oscilloscope which consist of narrowband
if filter and a local oscillator (receiver) capable of showing transmitter
carriers, spacing, harmonics and sidebands.
a.
Polygraph
b.
Harmonics analyzer
c.
Spectrum analyzer
d.
Computerized tomography
38.
One cycle is equal to how many degrees of rotation of a
conductor in a magnetic field?
a.
270
b.
360
c.
180
d.
90
39.
A measuring device which will result to full scale
reading at shorted terminal condition
a.
Voltmeter
b.
Ammeter
c.
Electrostatic meter
d.
Ohmmeter
40.
which of the following are the buses for information transfer
internally and externally in a microprocessor
a.
address bus
b.
data bus
c.
control bus
i.
A and C only
ii.
A and B only
iii.
B and C only
iv.
A, B, and C only
41.
If the voltage gain for each input of a summing
amplifier with a 4.8 kilo-ohm feedback resistor is unity, the input resistors
must have a value of _____ kilo-ohm.
a.
4.8 times the number of inputs
b.
48
c.
4.8 divided by the number of inputs
d.
4.8
42.
To match the waveguide to the load, _____ devices are
placed in the waveguide.
a.
Standing wave
b.
Resistive
c.
Metal plate
d.
Impedance changing
43.
What is the generic term for utilities and programs
needed to operate a computer system?
a.
Hardware
b.
Software
c.
People water
d.
Tupper ware
44.
The computer worm that infected computer systems
world-wide in 10 minutes, making it the fastest computer virus ever known is
called _____.
a.
Claw Hammer
b.
Sledge Hammer
c.
SQL Hammer
d.
SARS Virus
45.
The channel of JFET is between the _____.
a.
Input and output
b.
Drain and source
c.
Gate and drain
d.
Gate and source
46.
What is the common use of a push-pull amplifier?
a.
AN OPAM
b.
A driver
c.
Wideband amplifier
d.
A coupler
47.
For a bipolar junction transition(eto tlga yung
nakalagay) (BJT) to operate properly, the base-collector junction should be
_____ biased.
a.
Positive
b.
Forward
c.
Negative
d.
Reverse
48.
Large centralized data-processing complexes like
multi-national companies, departments and corporations use which type of
general-purpose computer that operates programs simultaneously?
a.
Mini-computer
b.
Micro0computer
c.
Main-frame computer
d.
Super-computer
49.
In parallel resonant LC circuit, what is the impedance
at resonant frequency?
a.
Zero
b.
The maximum impedance value
c.
Infinity
d.
Determined solely by the dc resistance
50.
The area in which the axis motion of a robot
manipulator can operate without any obstruction is called the e_____.
a.
Work area
b.
Range of operation
c.
Range of motion
d.
Work envelope
51.
The BEST choice electronic device to turn a device at a
particular voltage is a/an _____.
a.
SCR
b.
SCS
c.
DIAC
d.
PUT
52.
What term is used to describe the ability a system to
distinguish between targets that are close together?
a.
Radar sensitivity
b.
Target designation
c.
Radar agility
d. target resolution
53.
What do you call a concept which describes the relationship
of all functional components of a computer such as CPU and input./output
devices?
a.
Engineering development
b.
Architecture
c.
Prototyping
d.
Pre-production modeling
54.
The use of feedback to achieve the desired response of
a dynamic system in the presence of uncertainties, disturbance or constraints
is called _____.
a.
Synchronization
b.
Response
c.
Control
d.
Servomechanism
55.
The primary purpose of a voltage regulator is to
provide an output voltage with little or no _____.
a.
Figure of merit
b.
Value
c.
Regulation
d.
Variation
56.
Displays files in specified directory and all subdirectories
a.
Solid
b.
Doped
c.
Intrinsic
d.
Extrinsic
57.
In waveguide theory, what causes the current-carrying
area at the center conductor of the coaxial line to be restricted to a small
layer at the surface?
a.
Dielectric losses
b.
Standing wave
c.
Skin effect
d.
Copper losses
58.
This peak current specified for a given number of
cycles or portion of a cycle.
a.
Surge current
b.
Maximum current
c.
Peak surge current
d.
High current
59.
An electron moves into the electrostatic field between
a positive charge and a negative charge. Toward which charge will the electron
move?
a.
Outwards
b.
The negative charge
c.
The center
d.
The positive charge
60.
_____ is the definite discrete amount of energy
required to move an electron from a lower shell to a higher shell
a.
Quantum
b.
Positive energy
c.
The center
d.
The positive charge
61.
Which of the following are the basic measurements?
a.
Voltage
b.
Current
c.
Resistance
d.
Capacitance and conductance
i.
Neither (a and b) nor (c, d, and e)
ii.
A, b, c, d , and e
iii.
C, d, and e only
iv.
A and b only
62.
Monolithic integrated circuits are usually referred to
as _____.
a.
Selenium rectifiers
b.
?? (ndi ko na mabasa)
c.
Silicon chips
d.
Hybrids
63.
_____ is an intermodulation condition that occurs when
a carrier modulates by an undesired signal.
a.
Short modulation
b.
Cross modulation
c.
Under modulation
d.
Over modulation
64.
In microwave tubes, what is the basic principle of
operations of a klystron?
a.
Strong electrostatic field
b.
Energy transfer and amplification
c.
Oscillation
d.
Velocity modulation
65.
An English scientist who drew up plans for the first
programmable computer in 1830
a.
Vannevar bush
b.
William oughtred
c.
Charles Babbage
d.
Herman hollerith
66.
In an optical coupler, this parameter is the ratio of
the output current to the input current through the LED, expressed in
percentage. What is this ratio?
a.
DC current coupling ratio
b.
AC current transfer ratio
c.
AC current coupling ratio
d.
DC current transfer ratio
67.
_____ refers to the difference between the carrier
frequencies of an FM signal and the instantaneous frequency of its modulated
wave.
a.
Differential frequency
b.
Frequency deviation
c.
Modulated frequency
d.
Frequency band
68.
The most widely used abrasive is _____.
a.
Tungsten
b.
Graphite
c.
Silicon carbide
d.
Alumina
69.
The most common bias circuit providing Q-point
stability with a single polarity supply voltage is what type bias circuit
a.
Collector feedback
b.
Voltage divider
c.
Emitter
d.
Base
70.
What happens to the portion of the wave front that do
not satisfy the boundary conditions, when a wavefront is radiated into a
waveguide?
a.
It collapses
b.
It decreases to zero
c.
It is reflected back
d.
It increases to maximum
71.
The schokeydiode(eto tlga yungnakalagay. Schokey diode)
is a thyristor that conducts when the voltage across its terminal exceed the
_____ potential.
a.
Trigger
b.
Breakover
c.
Operating
d.
Maximum
72.
The value of the drain-to-source voltage of a GFET at
which the drain current becomes constant when the gate-to-source voltage is
zero is called _____ voltage.
a.
Breakdown
b.
Cut off
c.
Threshold
d.
Pinch off
73.
Insulators are characterized by a _____ energy gap
between its conduction bands an valence band.
a.
Very narrow
b.
Wide
c.
Very wide
d.
Narrow
74.
_____ is an electrical current that flows in one
direction only.
a.
Normal current
b.
Alternating current
c.
Direct current
d.
Eddy current
75.
The input resistance at the gate of an FET is _____.
a.
Relatively low
b.
Zero
c.
Extremely high
d.
Average
76.
It is the generated in a D.C. motor as armature coils
out the field flux opposes the applied voltage, and limits the flow of armature
current.
a.
Electromotive force
b.
Field excitation
c.
Counter-electromotive force
d.
Armature excitation
77.
The person responsible for the researend(as is) design
and development of a complete information system.
a.
PROGRAMMER
b.
PEOPLE WARE
c.
SYSTEM ANALYST
d.
COMPUTER OPERATOR
78.
In a robotic system, how many degrees of freedom can be
given to a manipulator by adding a wrist?
a.
Four
b.
Six
c.
Three
d.
Two
79.
Term for energy that is stored in electromagnetic or
electrostatic field.
a.
Amperes-joules
b.
Joules-coulombs
c.
Potential energy
d.
Kinetic energy
80.
What do you call the “Filter” between a corporate
network and the internet that keeps the corporate network secure from intruders
while giving corporate users unhibited access to the internet?
a.
Bandstep (as is)
b.
Bandpass
c.
Firewall
d.
Firestorm
81.
Which of the following circuit conditions requires
circuit protection?
a.
Direct short/shot circuit
b.
Excessive heat
c.
Excessive current
i.
A and C only
ii.
A, B and C only
iii.
B and C only
iv.
A and B only
82.
Two basic categories of voltage regulators are
a.
Differential, integral
b.
Capacitive, inductive
c.
Linear switching
d.
Centrifugal, centripetal
83.
A measure of the energy absorbed from radiation by
tissue or other biological material and is a equal to the transfer of 1 x 10-2
Joules energy per kilogram of material is called a _____.
a.
Radical
b.
Rad
c.
Radian
d.
Radius
84.
The type of feedback used to increase amplitude of
output signal.
a.
Negative feedback
b.
Unwanted feedback
c.
Positive feedback
d.
Fidelity feedback
85.
A transistor constructed with three-doped semiconductor
region separated by two pn junction is called a _____.
a.
Metal oxide semiconductor FET
b.
Field effect transistor
c.
Junction field effect transistor
d.
Bipolar junction transistor
86.
A type of filter that passes a narrow band of
frequencies though a current and attenuates the desired band of frequencies
that are high or lower than the desired band of frequencies.
a.
Low-pass filter
b.
Band-reject filter
c.
Band-pass filter
d.
High-pass filter
87.
Which of the following are circuit control devices?
a.
Switches
b.
Solenoid
c.
Relays
i.
B and C only
ii.
A and NB only
iii.
A, B, and C
iv.
A and C only
88.
What is an electric measuring equipment used in
navigation which uses time measurement concept for a wave to travel from a
place receiving station and back?
a.
Tacan
b.
OODR
c.
ILS
d.
DME
89.
In a stand alone supply of power the rationale of cells
making in series is to _____.
a.
Increase current capacity
b.
Increase voltage output
c.
Decrease voltage output
d.
Decrease internal resistance
90.
_____ is the total number of magnetic lines of force in
a magnetic field.
a.
Magnetic potential
b.
Magnetic flux
c.
Magnet flux intensity
d.
Flux density
91.
An electronic device that can be turned on and turned
off by a gate pulse is called a _____.
a.
Bipolar junction transistor
b.
Silicon-controlled switch
c.
Silicon-controlledrectirifer
d.
Shockley diode
92.
Which of the following are categories of computer
system software?
a.
Operating system (OS)
b.
Utility programs
c.
Languages translator
i.
A and B only
ii.
B and C only
iii.
A and C only
iv.
A, B, and C
93.
A hot-carrier diode is a diode that ____.
a.
Emits light when forward biased
b.
Switches very fast
c.
Varies resistance with temperature
d.
Changes its capacitance with voltage
94.
Which of the following are UJT terminals?
a.
Emitter
b.
Base
c.
Base2
d.
Gate
i.
B, C and D only
ii.
A, B, and C only
iii.
A, B and D only
iv.
All of the above
95.
An amplifier exhibits three critical frequencies in its
low-frequency response
a.
None of these
b.
167hertz
c.
130 hertz
d.
75 hertz
96.
The value of anode current below which the SCR switches
from the forward-conduction region to the forward blocking region is called
_____ current.
a.
Switching, Is
b.
Operation, Io
c.
Holding, Ih
d.
Forward blocking, Ibl (f)
97.
In a transformer, the principle of electromagnetic induction
is also known as _____.
a.
Coupling action
b.
Transformation
c.
Matching action
d.
Transformer action
98.
The symbols 1, 2 and 3 through 9 are what type of
numerals?
a.
Boolean
b.
Roman
c.
Binary
d.
Arabic
99.
Type of semiconductor diode varies its internal
capacitance as the voltage applied to its terminals varies.
a.
A zener diode
b.
A varactor diode
c.
A silicon-controlled rectifier
d.
A tunnel diode
100.
Which of the following are means of achieving tin films
in IC manufacturing?
a.
Thermal growth
b.
Chemical vapor deposition
c.
Evaporation
i.
A and C only
ii.
B and C only
iii.
A, B, and C
iv.
A and B only
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