Sierra College CIE Jim Weir

QuizTest!

CIE-10 Midterm 1

PLEASE NOTE: This midterm will NOT act like the quizzes in that it will give you your score but NOT which of the questions you missed. However, you MAY take it as many times as you wish.

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1: Electronics is the study of: electrons at rest
electrons in the nucleus
electrons in motion
electrons in the crystal lattice
2: The first battery was made by: Von Guericke
Volta
Galvani
Oersted
3: The transistor was invented by: Noyce, Kilby, Jobs
Gates, Jobs, Noyce
Edison, Tesla, Westinghouse
Bardeen, Brattain, Shockley
4: Common electronic solder has a core of: rosin
tin
lead
copper
5: The square root of 2: 0.707
1.414
4
8
6: The answer on your calculator is 47000. Pushing the ENG button gives the following result: 47E2
470E3
47E3
47,000
7: Watt's price for a steam engine was based on: steam pressure
cost to build the engine
gear ratio of the engine
horses
8: You have a 3000 watt electric heater that you use for two hours every day. At 15c per kilowatt hour, how much does it cost you to run that heater per year?: $328
$27
$153
$224
9: A voltmeter measures in _____ while an ammeter measures in _____.: ohms, volts
amperes, watts
parallel, series
series, parallel
10: The +5 to +15 variable voltage terminal on the trainer is color-coded: red
yellow
blue
black
11: Resistor color code: brown, gray, red, gold: 180 5%
1.8k 10%
1.8k 5%
18k 5%
12: The transistor was invented at: Edison Labs
Intel
Stanford University
Bell Labs
13: The unit of electromotive force or pressure is named after: Allesandro Volta
Luigi Galvani
Georg Ohm
Andre Ampere
14: A resistor made out of any material (carbon, wire, etc) will have MORE resistance if it is: long and fat
long and skinny
short and skinny
short and fat
15: A 22K ohm 5% resistor can be anywhere between _______ and _________ and be within tolerance: 20,900 23,100
22K +/- 2200
20,200 23,500
0 and 1100
16: To be a good conductor, the material's atoms must: be a metal
have an equal number of protons and neutrons in the nucleus
be a noble gas
have its outer electron shell nearly empty
17: the SECOND best conductor at room temperature is: gold
silver
copper
mercury
18: According to wirecalc.xls spreadsheet, if you run 10 amperes through a #34 wire it will: glow
fuse or melt
become a superconductor
become a low value resistor
19: An SCR is a: triggered latching switch
high gain transistor
a switch with an on-off terminal
another name for a piezo buzzer
20: A simple series circuit: has many paths for current flow
must have at least three elements
has no paths for current flow
has a single path for current flow
21: The total resistance in a series string of resistors: can be calculated by the "product over the sum" formula
can be calculated by the reciprocal of the reciprocals formula
is the sum of all the resistors
is less than the value of any one resistor in the string
22: A 25 watt automobile (12 volt) bulb will draw about how much current?: half an amp
2 amps
4 amps
8 amps
23: You have 2 each 10 Megohm resistors across a 10 volt source. You measure 3.3 volts across each resistor. Why?: Loading effect of the multimeter
That is the correct split in a series circuit
The resistors are out of tolerance
Transmogrification effect
24: When first turned on, an incandescent lamp: draws a low amount of current then slowly comes up to the final current
has a constant current at all times
instantaneously draws a large amount of current
is a constant voltage device
25: Excel Spreadsheet: Power in cell C8. Resistance in cell D5. Voltage calculation is done by: =sqrt(C8*D5)
=(C8^2)/D5
=(D5^2)/C8
=D5*C8
26: A two resistor parallel circuit may be replaced by a single resistor given by the equation: product divided by the product
sum of the two resistor values
sum divided by the product
product divided by the sum
27: Cadmium sulphide: is very expensive
makes an excellent high-precision resistor
is photosensitive
is an excellent insulator
28: Electricity generated chemically: is generally DC
is generally AC
uses two identical metals
uses water as the electrolyte
29: "Galvanized" means: supplied with voltage
plated with zinc
used for heavy current flow
twisted together
30: An automobile battery uses: nitric acid
hydrochloric acid
sulphuric acid
muriatic acid
31: The primary metal in an automobile battery is: mercury
cadmium
nickel
lead
32: A "supermagnet" is made from: neodymium, iron, and boron
silicon, germanium, and gallium arsenide
strontium, barium, and iron oxide
aluminum, nickel, copper, and steel
33: Using the oscilloscope "normally" the x axis is calibrated in _____ and the y axis is calibrated in _____.: voltage, time
time, voltage
resistance, voltage
current, voltage
34: The oscilloscope time base moves the beam: up to down
down to up
left to right
right to left
35: Most commercial electricity is made by: mechanically pushing magnets into and out of coils
photoelectric cells
chemical batteries
rotating turbines
36: The "diode" was invented by _____ and reinvented by _______: De Forest, Edison
Edison, Fleming
Fleming, De Forest
De Forest, Fleming
37: An "N" type semiconductor may be made by doping _____ with _______: silicon, arsenic
germanium, boron
gallium arsenide, indium
tin, lead
38: A silicon diode BEGINS to conduct with a forward voltage of ______ volts and is fully conductive at _____ volts.: 0,0 , 0.4
0.4, 0.5
0.4, 0.7
0.7, 1.2
39: A switching diode is normally biased in the ______ direction and a zener diode in the _____ direction: forward, reverse
reverse, forward
forward, forward
reverse, reverse
40: All diodes are also: light emitting diodes
photodiodes
tunnel diodes
schottky diodes
41: In Lab 12, probing the lump of pure silicon gave an ohmmeter reading of: zero ohms
about 10k ohms
about 100k ohms
open circuit
42: The zener diode we used in Lab 12 had a zenering voltage of about: 0.7 volts
2 volts
5 volts
10 volts
43: A transformer has 1000 turns on the primary and 250 turns on the secondary. If the primary is energized from a household wall plug, you would measure about _______ volts on the secondary: 115
250
28
460
44: The pulsating DC of a simple rectifier is turned into nearly pure DC with the addition of a: bridge rectifier
filter capacitor
zener diode
load resistor
45: Electrolytic capacitors: have a polarity
may be installed in either direction
have very low capacitance values
are relatively small in size compared to disk ceramic capacitors
46: The "7805" on a voltage regulator means: 78 volts at 5 amps
5 volts at 78 amps
7.8 volts and designed in 2005
positive 5 volt regulator
47: A 1N400x diode means: you need to use the x as the cathode end of the diode
you could use a 1N4002 if you wanted
the diode has failed in the overvoltage mode
it is a 40 volt zener diode
48: A half-wave rectifier uses _____ diode(s) and a full wave rectifier uses _____ diode(s): one, one
two, one
one, two
two, two
49: A bridge rectifier is used to: bridge across from the transformer directly to a zener without having to use a filter capacitor
do full wave rectification without a transformer center tap
transmogrify the current to voltage converter
bridge across the whole secondary winding of the lab transformer box
50: The 7805 regulator we used in the lab experiment: was in the plastic (TO-220) case
was in the metal (TO-3) case
had an output current rating of 2 amps
provided an output voltage of 12 volts