Associate CET Practice Exam Questions & Answer Correct 100%

8.33 meters is the full wavelength in air for what RF frequency? - Answer 36 MHz Decimal 164 would appear as ________ in binary? - Answer A resistor has color stripes yellow, violet, violet, silver. It is: - Answer 470 MegOhm +/- 10% what is the total capacitance of three capacitors valued at 100pf, 100pf, and 50pf when connected in a series? - Answer 25 pf what is the ripple frequency of a full wave single phase bridge rectifier operated at 60Hz? - Answer 120Hz When heated or cooled, a ________emits a voltage. - Answer theromcouple Which wire size is physically largest? - Answer #8 Adding the binary numbers 101011 and 001110 will give you what result? - Answer 111001 A component that reduces in resistance as it is heated: - Answer Is a negative temperature coefficient thermistor An autotransformer: - Answer has a single winding A dual trace oscilloscope differs from a single trace in that only the dual trace scope: - Answer alternates sweeps If an RF signal voltage is reduced by 6 dB, it is then: - Answer half the original size Applying positive voltage to the P end and negative to the N end of a germanium diode: - Answer will forward bias it You would probably prefer a digital VOM over an ordinary analog meter: - Answer for most accuracy You should expect the video amplifier in a radar or TV receiver to have a frequency response of: - Answer 0-6 MHz The radio communication mode that utilizes the basic frequency and one of the side bands: - Answer is called "SSB" When using fiber optics to transfer a signal, the light must: - Answer Enter the "cone of acceptance" The energy stored in a coil is measured in: - Answer Joules The telephone communication term "cellular" refers to: - Answer small geographic areas covered by each base station. Integrated Circuit failures often exhibit: - Answer open or short conditions Which of these would you normally choose to cause an LED to light? - Answer 3 V DC A capacitor (3/8" x 1/8" ceramic or mica) marked 47K is: - Answer 47pf+/- 10% A digital storage oscilloscope: - Answer uses micro processing and memory to allow close analysis of signals; is specially designed for analyzing digital signals; converts analog input signals to a digital display Carbon microphones are much like variable: - Answer Resistors An antenna that is longer than another: - Answer will have a lower resonant frequency An 8-bit binary code allows ______ logical combinations. - Answer 256 An inductor in an electronic circuit: - Answer resists AC current flow A printer directly connected to a personal computer would use a _______ connection. - Answer USB or parallel Centronics The digital method of representing characters by using combinations of zeros and ones is called: - Answer binary Fm utilizes ______ where AM utilizes signal level variations. - Answer frequency variations What decimal number is represented by the binary number ? - Answer 106 Decimal 50 would appear as _____ in Hex. - Answer 32 Of these choices, the display of a DMM would probably be: - Answer LCD A disadvantage of LCD is: - Answer environmental temperature sensitivity A series DC motor maintains a constant speed with changing loads? - Answer may be damaged by excessive speed Which motor maintains constant speed with changing loads? - Answer Shunt A small power drill or electrics mixer would probably be powered by a/an ______ motor. - Answer series The rotor in an induction motor is not connected to AC or DC power. - Answer True 0 dBm, when referring to audio signals means: - Answer decibels referenced to 1 milliwatt If a class A differential amplifier is using only one of its two possible inputs, what will the output signal shape be? - Answer exactly the same as the one input voltage is: - Answer potential difference between two points _______ is a term describing many op-amp circuits. - Answer Inverting The gain of an op-amp is inversely related to band width as input frequency increases. - Answer Always The audio detector circuit in an AM radio most commonly is a: - Answer Diode A differential amplifier with two identical in phase signals on the inputs will have an output __________. - Answer of zero A free running oscillator is also called a monostable multivibrator. - Answer false A fuse which has its fusible wire wrapped around an insulator is: - Answer a slo-blo type fuse The power transformer in a power supply: - Answer might step voltages up or down Which of the below would be considered "basic" components of a non switching power supply? - Answer filter, rectifier, transformer The average of a full sine wave rectified voltage is: - Answer .637 x peak The ripple frequency for a half wave rectifier operating from 60 Hz electrical power is: - Answer 60 Hz The effective voltage of a 100V peak to peak sine wave is: - Answer 35.35 A pi filter is an inductor with: - Answer a capacitor at each end to common An inductor opposes any change in: - Answer current A capacitor opposes any change in: - Answer voltage A capacitor will charge to what percent of full charge in one RC time? - Answer 63.2 Moving one plate of a capacitor further away from the other will: - Answer decrease capacitance The fact than an inductor opposes any change in current is true of: - Answer AC and DC signals If you increase the value of a capacitor, the capacitive reactance will: - Answer decrease In checking a capacitor to see if it is shorted, open or leaky, you would use the ________Ohm meter range. - Answer Highest The capacitor in a power supply capacitive filter: - Answer is in parallel with the load The time required to dicharge a capacitor depends on the _____________ across its terminals. - Answer the combination of LRC With a given filter type, pure filtering is easiest with: - Answer high frequencies Using a resistor instead of an inductor in a power supply pi filter: - Answer all of the above A power supply whose output voltage does not change whether the load is light or heavy, would have what percent of regulation? - Answer 0 A power supply which measures 50 volts when under no load and 40 volts under a full load has what percent regulation using the % of regulation formula: (%=(EnL - EfL) / EfL x 100)? - Answer 25 Correctly connecting a properly rated zener diode across a power supply load will: - Answer limit the output DC A triac in a power control circuit: - Answer acts as an on/off switch Which wire gauge has the largest diameter? - Answer 20 What specification should NOT be of concern regarding wire conductors? - Answer Length The normal open circuit voltage for each nickelcadmium cell is approximatley ________. - Answer 1.2