101. The application of a 'stick-off' voltage to a control synchro servo system is. (Level 1), A. to overcome the effect of static friction., B. to overcome the effect of viscous friction., C. to prevent alignment to a false null., 102. Diodes are:, A. Conductors,, B. Semi-conductors, C. Insulators, 103. For the intrinsic conductivity of diodes, A. At 0 degrees Kelvin, a semiconductor is a non-conductor, B. At 0 degrees Celsius, a semiconductor is a non-conductor, C. At 0 degrees Kelvin, a semiconductor is a conductor, 104. A junction diode, A. Is similar to a vacuum diode but cannot rectify, B. Has one p-n junction, C. Can handle only very small currents, 105. In a semiconductor junction diode, electrons are the minority carriers., A. Within the P region, B. Within the N region, C. In both the N and P regions, 106. Forward voltage of a silicon diode is., A. 1.7V, B. 0.7V, C. 0.3V, 107. To function, i.e. conduct, a junction diode made of silicon requires a forward bias of at least, A. 0.2 V, B. 1.41 V, C. 1 V, 108. If forward bias is increased from zero on a p-n junction, a rapid increase in current flow for a relatively small increase in voltage occurs., A. When the flow of minority carriers is sufficient to cause an avalanche breakdown, B. When the depletion layer becomes larger than the space charge area, C. Only after the forward bias exceeds the potential barrier, 109. When a diode is forward biased the, A. Positive lead is connected to both N and P type, B. Positive lead is connected to the P type and negative to the N type., C. Positive lead is connected to the N type and negative to the P type, 110. The micro diodes are:, A. Primarily used for electrical power supply devices, B. Mainly used in communication technology, C. Used in rectifier circuits for large power outputs, 111. The rectifier diodes are:, A. Primarily used for electrical power supply devices, B. Mainly used in communication technology, C. Used in rectifier circuits for large power outputs, 112. The terminal of transistor with an arrow is named, A. Base, B. Collector, C. Emitter, 113. In a NPN transistor the P is the, A. Collector, B. Emitter, C. Base, 114. Which layer of transistor is called the emitter?, A. First layer, B. Middle layer, C. Last layer, 115. A transistor has three terminal are, A. Source, Gate, Drain, B. Emitter, Base, Collector, C. Source, Base, Drain, 116. Two transistor types are, A. NPN transistor and PNP transistor, B. NPP transistor and PPN transistor, C. NNP transistor and PNN transistor, 117. A transistor is used as, A. A fast electronic switch, B. A regulator for small and medium DC voltages and currents, C. A fast electronic switch or regulator for small and medium DC voltages and currents, 118. If the arrow points outside the transistor, A. It is a NPN transistor, B. It is a PNP transistor, C. It is a NPN or PNP transistor, 119. If the arrow points from emitter to base, the transistor is, A. NPN transistor, B. PNP transistor, C. NPN or PNP transistor, 120. In a transistor, number of sequential semiconductor layers are, A. 2, B. 3, C. 4, 121. The Middle layer of transistor is called, A. Emitter, B. Base, C. Collector, 122. What are Integrated Circuits?, A. Integrated Circuits are conections of several electronic components by wiring, B. Integrated Circuits are arrangements of several electronic components in a common housing, C. Integrated Circuits are arrangements of semiconductor layers, 123. What is the major advantage of integrated circuits?, A. Very high density of the components, B. They are quit resistant to mechanical stress, C. They are very cheap, 124. Usually the following components are integrated in ICs (Integrated Circuit), A. Semiconductors (Transistors, Diodes), Resistors, B. Semiconductors (Transistors, Diodes), Capacitors, C. Semiconductors (Transistors, Diodes), Resistors, Capacitors, 125. What are the disadvantages of integrated circuits?, A. Small housing and therefore the small surface, B. ICs can not be repaired, C. Small housing and therefore the small surface, ICs can not be repaired, 126. Which following components are integrated in ICs?, A. Transistors, Diodes, Resistors and Capaciors, B. Transistors, Diodes, Resistors and Inductances, C. Transistors, Diodes, Inductances and Capaciors, 127. Which component usually can not be integrated due to their large space requirements?, A. Capaciors, B. Inductances, C. Transistors, 128. Usually ICs are made from, A. Very pure Silicon, B. Very pure Germanium, C. Impure Silicon, 129. The operational amplifier is always a differential amplifier with, A. One input and one output, B. One input and two outputs, C. Two inputs and one output, 130. The inverting input of operational amplifier is usually designated with, A. A plus sign, B. A minus sign, C. A minus output, 131. The dimensions of operational amplifiers are, A. Very large, B. Medium, C. Very small, 132. The PCBs have been a popular medium for the installation of electronic components since, A. The early of 1950s, B. The 1970s, C. The 2000s, 133. A multi-layer PCB has, A. Two or more layers on one or both sides, B. One layer on either side, C. Two or more layers connected in series, 134. A Printed Circuit Board (PCB) is constructed of a plastic laminate which has bonded to one or both sides, A. a thick sheet of copper, B. a thin sheet of copper, C. various thicknesses of copper, 135. What is the base material of a PCB?, A. Insulator, B. Semiconductor, C. Conductor, 136. For printed circuit boards. Which material are also used for specialized applications?, A. Polyester, Teflon, B. Polyester and ceramics, C. Polyester, Teflon and ceramics, 137. TR is the abbreviation for a, A. transmitter Resolver, B. torque receiver, C. torque synchro, 138. TX is the abbreviation for a, A. torque receiver, B. control transformer, C. torque transmitter, 139. Servo systems can be loosely divided into, A. Two different types, B. Three different types, C. Four different types, 140. Synchros compare in construction to alternating current generators are, A. Similar, B. Difference, C. More complex, 141. Synchros work like, A. Voltage regulators, B. Induction regulators, C. Resistance regulators, 142. Differential transmitters are used to, A. Add or subtract angles, B. Add or subtract two electrical signals, C. Increase the operating speed of the synchro receiver, 143. Rotating magnetic field is no longer possible if, A. A stator lead is broken, B. A stator winding is defective, C. If a stator lead is broken or a stator winding is defective, 144. Resolvers have coils in the stator and the rotor which are displaced by, A. 0 degrees from each other, B. 180 degrees from each other, C. 90 degrees from each other, 145. An LVDT is used to transfer, A. linear movements, B. linear movements but also angular movements, C. angular movements, 146. To measure position or speed of a component. Which principle is can be use, A. The principle of Resistance, B. The principle of Inductance, C. The principle of capacitance

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