Below are the answers key for the Multiple Choice Questions in Transmission Fundamentals Part 3.

101. the difference between the frequency at which the cutoff wavelength is twice the narrow dimension

102. at a distance of one quarter –wavelength from the sealed end

103. A high value of resistance

104. an impedance mismatch between the line and the load

105. the line behaves as a parallel-tuned circuit in relation to the generator

106. any convenient value

107. at the beginning and at the end of the cable

108. its input impedance at the generator is equal to the line’s surge impedance

109. transfer maximum power to the load

110. 3

111. SWR

112. F3C and A3E

113. AWG #19

114. Wavelength

115. square root of the dielectric constant

116. Waveguide

117. balun

118. 0.5 km

119. mode

120. 3 GHz

121. Waveguides

122. entropy

123. reduced electromagnetic interference

124. all of the above

125. inductance

126. Coaxial

127. length

128. 120 ohms

129. Zo = ZL

130. adjusting the length of transmission line

131. Standing waves

132. 1

133. 1.46

134. 0

135. Reflection coefficient

136. 1.5

137. 300 MHz

138. Antennas

139. Parallel resonant circuit

140. Series resonant circuit

141. Coaxial

142. Twisted pair

143. Coaxial cable

144. Length of the wire

145. preventing AC power supply voltage from being shorted by a balun or band splitter

146. Adjacent channel interference

147. Reducing the effect of noise on the TVRO video signal

148. 40 db

149. Frequency and voltage

150. 3-dB loss

#### Questions and Answers in Transmission Fundamentals Series

Following is the list of multiple choice questions in this brand new series:

**MCQ in Transmission Fundamentals**

**MCQ from Number 1 – 50**Answer key:

**PART 1**

**MCQ from Number 51 – 100**Answer key:

**PART 2**

**MCQ from Number 101 – 150**Answer key:

**PART 3**

**MCQ from Number 151 – 200**Answer key:

**PART 4**

**MCQ from Number 201 – 250**Answer key:

**PART 5**

**MCQ from Number 251 – 300**Answer key:

**PART 6**

**MCQ from Number 301 – 350**Answer key:

**PART 7**

**MCQ from Number 351 – 400**Answer key:

**PART 8**

**MCQ from Number 401 – 450**Answer key:

**PART 9**

**MCQ from Number 451 – 500**Answer key:

**PART 10**

### Complete List of MCQ in Communications Engineering per topic