Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CET > CET 2 > Flashcards

CET 2 Flashcards

1
Q

A sample size of 10 is taken with results
given by: 7.07, 7.00,7.10, 6.97,7.00,
7.03,7.01,6.98,7.08,7.01. Calculate the
sample variance.

A. 0.0016
B. 0.0019
C. 0.0013
D. 0.0015

A

B. 0.0019

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A tire manufacturer wants to determine the inner diameter of a certain grade of tire. The data are as follows: 572, 572,573,568, 569, 575, 565, 570. Determine the sample standard deviation.

A. 8.75
B. 2.958
C. 10
D. 3.162

A

D. 3.162

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The ability of a material to remain
magnetized after removal of the
magnetizing force is known as

A. reluctance
B. permeability
C. hysteresis
D. retentivity

A

D. retentivity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

You are measuring the voltage at a
given point in a circuit that has very high
resistance values and the measured
voltage is a little lower than it should be
This is possibly because of

A. all of these answers
B. the source voltage is too low
C. one or more of the resistance values being
off
D. the loading effect of the voltmeter

A

A. all of these answers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

In a series RLC circuit that is operating
above the resonant frequency, the
current

A. is zero
B. leads the applied voltage
C. is in phase with the applied voltage
D. lags the applied voltage

A

D. lags the applied voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

By using Thevenin’s Theorem, a
complex two-terminal network may be simplified for solution by converting it into a simple circuit in which the so
called _ and the looking-back
resistance are connected in _ with
the load resistor.

A. short-circuit voltage, parallel
B. open-circuit voltage, series
C. short-circuit voltage, series
D. open-circuit voltage, parallel

A

B. open-circuit voltage, series

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In the differential amplifier circuit, which
of the following terminals are
connected together?

A. Bases
B. Emitters
C. One base to another collector
D. Collectors

A

B. Emitters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which one of the following is not an
input or output of the 555 timer?

A. Threshold
B. Clock
C. Trigger
D. Reset

A

B. Clock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

LEDs are based on the principle of

A. Forward bias
B. Electroluminescence
C. Electron-Hole recombination
D. Photon Sensitivity

A

B. Electroluminescence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A register in the microprocessor that
keeps track of the answer or results of
any arithmetic or logic operation is the:

A. program counter
B. stack pointer
C. accumulator
D. instruction pointer

A

C. accumulator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which of the following is NOT the same
as a Johnson Counter?

A. Mobius counter
B. Straight ring counter
C. Walking ring counter
D. Twisted ring counter

A

B. Straight ring counter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What logic gate is described by the truth
table in Fig. 10-15-09-C1?

(CET 2 TABLE)

A. NOR gate
B. NAND gate
C. OR gate
D. AND gate

A

D. AND gate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many terminals does a
programmable unijunction transistor
(PUT) have?

A. 4
B. 3
C. 1
D. 2

A

B. 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which equation is correct?

A. VNL = VOH(min)- VIH(min)
B. VNH = VOH(min)+ VIH(min)
C. VNH = VOH(min)- VIH(min)
D. VNL = VIL(max)+ VOL(max)

A

C. VNH = VOH(min)- VIH(min)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When the sound wave goes from air into
water, the quantity that remains
unchanged is its _____

A. frequency
B. wavelength
C. amplitude
D. speed

A

A. frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

An object closer to converging lens than its focal point always has an image that is______

A. inverted
B. virtual
C. smaller in size
D. the same in size

A

B. virtual

17
Q

According to this law, “The force
between two charges varies directly as
the magnitude of each charge and
inversely as the square of the distance
between them.”

A. Coulomb’s Law
B. Law of Universal Gravitation
C. Kepler’s Law
D. Newton’s Law

A

A. Coulomb’s Law

18
Q

It describes the luminous flux incidence per unit area and is expressed in lumens per square meter.

A. Luminous Intensity
B. Illuminance
C. Radiance
D. Candela

A

B. Illuminance

19
Q

The energy stored in s stretched elastic
material such as spring is

A. mechanical energy
B. elastic potential energy
C. internal energy
D. kinetic energy

A

B. elastic potential energy

20
Q

When the pitch of a note is raised,

A. its wavelength is increased
B. wavelength remains constant
C. its frequency decreases
D. its frequency increases

A

D. its frequency increases

21
Q

A wave in which the particles of the
material move up and down as the wave
goes from left to right is called:

A. longitudinal wave
B. standing wave
C. transverse wave
D. none of these choices

A

C. transverse wave

22
Q

Suppose that energy Q is required to
accelerate a car from rest to v,
neglecting friction. How much added energy would be required to increase the speed from v to 2v?

A. 2Q
B. 4Q
C. 3Q
D. Q

A

C. 3Q

23
Q

One Newton is equal to how many
pounds?

A. 2.2
B. 4.45
C. 0.225
D. 100,000

A

C. 0.225

24
Q

The power sent down the line toward
the load is known as

A. reflected power
B. incident power
C. flat line
D. standing wave

A

B. incident power

25
Q

The current and voltage along a properly
matched line are___‘_

A. resonant
B. reactive
C. reflective
D. flat

A

D. flat

26
Q

For an ideal condition, SWR should be

A. one
B. zero
C. as low as possible
D. as high as possible

A

A. one

27
Q

The characteristic impedance of an open-wire balance line is determined from its physical structure S is the
center-to-center distance of the
conductors and d is the diameter of the
conductor. At what condition is the
characteristic impedance minimum?

A. d=2S
B. S=2d
C. S»d
D. S=d

A

D. S=d

28
Q

When sending power down a
transmission line, it is usually desirable that as much power as possible will be absorbed by the load and as little as
possible will be reflected back to the source. A positive voltage pulse sent down a transmission line terminated with its characteristic impedance:

A. would reflect as a negative pulse
B. would reflect as a positive pulse
C. would reflect as a positive pulse followed
by a negative pulse
D. would not reflect at all

A

D. would not reflect at all

29
Q

A type of cable used in electronics to carry alternating current, designed to reduce the skin effect and proximity effect losses in conductors used at frequencies up to about 1 MHz.

A. solid wire
B. feeder cable
C. litz wire
D. twisted pairs

A

C. litz wire

30
Q

Which symbol in radio signal emission
designation is referred to type of
modulation of the main barrier?

A. Second
B. Fourth
C. First
D. Third

A

C. First

31
Q

Image frequency is defined as any
frequency other than the selected radio
frequency carrier that, if allowed to
enter a receiver and mix with local
oscillator will produce a cross-product frequency that is equal to intermediate frequency. Image frequency problems would be reduced by:

A. having a wideband RF amplifier after the
mixer
B. having a narrowband RF amplifier
before the mixer
C. having an IF amplifier with the proper
shape factor
D. none of these choices

A

B. having a narrowband RF amplifier
before the mixer

32
Q

One of the following refers to an output
of a balanced modulator.

A. SSB
B. ISB
C. DSB
D. AM

A

C. DSB

33
Q

Why are image frequencies somewhat less of a problem in FM receivers than they are in SSB or AM receivers?

A. FM mixer stages are square-law devices
B. FM receivers do not use the
superheterodyne design
C. FM signals have a capture effect
characteristic.
D. SSB uses less bandwidth than does FM.

A

C. FM signals have a capture effect
characteristic.

34
Q

What determines the selectivity of a
receiver?

A. the frequency stability
B. the gain of the amplifier
C. the power handling capability
D. the bandwidth of the tuned circuits

A

D. the bandwidth of the tuned circuits

35
Q

It is a form of amplitude modulation in
which the carrier and one complete
sideband is transmitted, but only part of
the second sideband is transmitted.

A. DSB
B. SSBSC
C. ISB
D. VSB

A

D. VSB

36
Q

Thermal Noise is the electronic noise generated by the thermal agitation of the charge carriers (usually the
electrons) inside an electrical conductor
at equilibrium, which happens
regardless of any applied voltage. If the
value of a resistor creating thermal
agitation noise is doubled. The noise
power generated is therefore

A. Quadrupled
B. Unchanged
C. Halved
D. Doubled

A

B. Unchanged

37
Q

Amplitude Modulation (AM) is the
process of changing the amplitude of a relatively high frequency carrier signal in proportion with the instantaneous value of the modulating signal (information)
while Frequency Modulation (FM) is a system in which the amplitude of the carrier is kept constant, while its
frequency and rate of change are varied by the modulating signal. Indicate which one of the following is not an advantage of FM over AM:

A. better noise immunity is provided
B. Less modulating power is required
C. The transmitted power is more useful
D. Lower bandwidth is required

A

D. Lower bandwidth is required

CET (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions