PART 4 Test Item File

Transcription

1 PART 4 Test Item File

2 Principles of Electric Circuits, 8e (Floyd) Chapter 1: Quantities and Units 1) The unit of measurement for conductance is the coulomb. (True/False) 2) Kilo equals 1,000 times the base unit. (True/False) 3) Inductors store energy in an electrostatic field. (True/False) 4) An electronic device which stores an electric charge is known as an inductor. (True/False) 5) The symbol μ is an abbreviation for 10-6 or micro. (True/False) 6) Which of the following are common applications of electronics? A) Computers B) Communications systems C) Automation D) Consumer products E) All of the above 7) The symbol for current is: A) C B) I C) A D) V 8) The unit of measurement for current is the: A) Volt B) Ampere C) Watt D) Ohm 9) The symbol for voltage is: A) C B) R C) A D) V 10) The unit of measurement for voltage is the: A) Volt B) Ampere C) Watt D) Ohm 11) The symbol for a resistor is: A) C B) R C) A D) V 262

3 12) The shortcut symbol for ohms is: A) α B) Ω C) δ D). 13) The unit of measurement for resistance is the: A) Volt B) Ampere C) Watt D) Ohm 14) Which of the following is NOT a typical electrical component? A) Resistor B) Capacitor C) Megatron D) Inductor E) Transformer 15) An ohmmeter is used for measuring: A) current B) resistance C) voltage D) power 16) Which of the following metric prefixes is NOT commonly used in electronics work? A) kilo B) milli C) tera D) micro E) pico 17) Express the number 10,000 in proper scientific notation. A) B) C) D) ) Convert 4.7 ma to amperes. A) A B) A C) 4,700 A D) 47,000 A 19) Convert 120 mw to W. A) 120,000 W B) 1,200 W C) W D) 0.12 W 263

4 20) Convert 10,000 ohms to kω. A) 1 kω B) 10 kω C) 100 kω D) 1000 kω 21) Convert 75 μv to mv. A) 7500 mv B) 75,000 mv C) mv D) mv 22) Convert 5.7 mw to μw. A) μw B) μw C) 57,000 μw D) 5,700 μw 23) Convert W to the closest standard metric prefix. A) 68 μw B) 0.68 μw C) 680 μw D) 6.8 μw 24) Convert A to the closest standard metric prefix. A) 3.95 ma B) 39.5 ma C) ma D) 395 ma Convert the following: 25) Amp = A) 2 microamps B) 2 amps C) 2 milliamps D) 0.5 milliamps 26) 4.7 kω = A) Ω B) Ω C) Ω D) Ω 27) 3.9 kω = A) Ω B) Ω C) Ω D) Ω 264

5 28) 980 microvolts = A) 9.80 millivolts B) V C) V D) both A and C E) none of the above 29) 2.2 kv = A) 2,200 Volts B) V C) V D) V 30) Siemens is a unit for: A) resistance B) conductance C) power D) voltage 31) The is a device that magnetically couples ac voltages from one point in a circuit to another. A) dc power supply B) capacitor C) transformer D) inductor 32) A resistor is a device that. A) opposes the flow of electrons B) stores power C) is a type of semiconductor D) stores electrostatic charge 33) The shorthand method that uses a base number between 1 and 10 is called: A) decimal B) scientific notation C) prefix D) engineering notation 34) The symbol for power is: A) Z B) W C) Q D) P 35) An oscilloscope is used primarily for measuring. A) current B) ac voltage C) power D) conductance 265

6 36) Express =,. A) , 4.73 milli B) , 4.73 micro C) , 4.73 milli D) M ,.473 milli 37) Express in milli, basic units, and micro. A) 5.6 milli, 0.056, micro B) 56 milli, 0.056, micro C) 560 milli, 5.600, 5600 micro D) 5600 milli, 56, 560 pico 38) Multiply ( )(48 101) =,. A) , 47.6 micro B) , 47.6 milli C) , 47.6 milli D) , 47.6 nano 39) Add ( ) + ( ) =,. A) , 1.4 Giga B) , 1.4 Giga C) , 1.4 Giga D) , 1.4 Mega 40) Subtract ( ) - ( ) =,. A) , 3.24 milli B) , 3.24 kilo C) , 3.24 kilo D) , 3.24 kilo 41) Divide = A) , 283 micro B) , 283 micro C) , 283 micro D) , 283 micro 42) Convert 4,600,000 Ω to Mega Ω. A) 4.6 Mega Ω B) 460 Mega Ω C) 4600 Mega Ω D) 46 Mega Ω 266

7 43) 2 μf = A) 2000 nf B) 200 pf C) F D) both A and C 44) Express the number 51,000,000,000 in proper scientific notation. A) B) C) D) ) The SI system is A) based on a system of fundamental units B) used for engineering work C) used for scientific work D) an international system E) all of the above 267

8 1) FALSE 2) TRUE 3) FALSE 4) FALSE 5) TRUE 6) E 7) B 8) B 9) D 10) A 11) B 12) B 13) D 14) C 15) B 16) C 17) C 18) B 19) D 20) B 21) C 22) D 24) C 25) C 26) B 27) C 28) E 29) A 30) B 31) C 32) A 33) B 34) D 35) B 36) A 37) B 38) C 39) A 40) B 41) C 42) A 43) D 44) A 45) E 23) A 268

9 Principles of Electric Circuits, 8e (Floyd) Chapter 2: Voltage, Current, and Resistance 1) The smallest particle of an element that still retains the characteristics of the element is called an atom. (True/False) 2) Electrons are negatively charged particles, and are contained in the nucleus of the atom. (True/False) 3) In the neutral state all atoms contain the same number of protons and electrons. (True/False) 4) The outermost shell of an atom is called the valence shell. (True/False) 5) The copper atom contains 29 free electrons. (True/False) 6) The nucleus contains protons and electrons, each with an opposite charge. (True/False) 7) The process of gaining a valence electron is known as ionization. (True/False) 8) Valence electrons are tightly bound in insulators. (True/False) 9) Current value depends on the amount of charge moving past a point in a unit of time. (True/False) 10) The movement of electrons between two points is called voltage. (True/False) 11) The best conductor in the following list is: A) Silver B) Copper C) Silicon D) Germanium 12) The materials with the fewest free electrons are classified as: A) conductors B) semiconductors C) insulators D) silly putty 13) The unit of electrical charge is measured in: A) amperes B) free electrons C) positive or negative charges D) Coulombs 14) How is a negative ion produced? A) the atom loses an electron from the valence shell B) the atom gains a proton in the nucleus C) the atom gains an electron in the nucleus D) the atom gains an electron in the valence shell 269

10 15) A voltage source contains which of the following? A) potential energy B) potential difference C) electromotive force D) all of the above 16) Which of the following is NOT a voltage source? A) battery B) semiconductor C) solar cell D) generator 17) The rate of flow of free electrons in a conductive material is called: A) ampere B) current C) voltage D) coulomb 18) Five coulombs of charge flow past a point in 0.5 seconds. How many amperes of current are flowing? A) 5 A B) 10 A C) 15 A D) 20 A 19) The opposition to current is called: A) resistance B) conductance C) insulators D) ohms 20) The typical resistor to use for higher power applications would be the: A) carbon-composition B) carbon film C) metal oxide D) metal film E) wire wound 21) A resistor coded with Red-Violet-Black-Gold bands respectively, would be of what value and tolerance? A) 270 Ω +/- 5% B) 27 Ω +/- 5% C) 2.7 Ω +/- 5% D) 0.27 Ω +/- 5% 22) A potentiometer is a: A) variable resistor B) voltage-control device C) 3-terminal device D) all of the above 270