1-35. 1-36. 1-37. 1-38. 1-39. 1-40. Which of the following elements is NOT a part of an electron gun? 1.   Anode 2.  Cathode 3.  Bias  plate 4.  Control  grid Multicavity klystron amplifiers can have what total number of cavities? 1.   One 2.   Five 3.   Three 4.   Seven To overcome beam spreading on klystron amplifiers, what type of field is used? 1.  Electron 2.  Magnetic 3.  Axial  magnetic 4.  Mutual  repulsion In  most  klystron  tubes,  the  anode  and  the  RF section are connected in the vacuum envelope. These connected parts are called the tube 1.   current 2.  biasing 3.  plating 4.   body Klystron amplifier equipment does NOT normally have undercurrent protection in each of the electromagnetic  circuits. 1.  True 2.   False In a very-high-power klystron, the body current is often limited to what percent of the total beam current? 1. 8 2. 2 3. 3 4. 5 1-41. All high-powered klystrons use what type of cooling? 1.   Electronic 2.  Liquid 3.   Gas 4.   Air 1-42. What is the main source of heat in the klystron amplifier package? 1.  Grid  power  supply 2.  Beam  power  supply 3.  Plate  power  supply 4.  Biasing  power  supply 1-43. What type of noise usually occurs because the electron  beam  is  never  perfectly  homogeneous? 1.  Cavity 2.   White 3.   Grid 4.   Bias 1-44. What is the primary use for traveling-wave tubes? 1. 2. 3. 4. Voltage amplification Current amplification Power amplification Bias   amplification 1-45. A forward-wave TWT may be constructed to serve as what type of oscillator? 1.  Stable 2.  Forward 3.   Internal 4.  Microwave 1-46. A pulsed high-voltage power supply is called a 1.  mixer 2.   oscillator 3.  amplifier 4.  modulator 4