2 1-8.   Which of the following is NOT a class of operation for an amplifier? 1.    A 2.    C 3.    AB 4.    AC 1-9.   If the output of a circuit should be a representation of less than one-half of the input signal, what class of operation should be used? 1.    A 2.    C 3.    AB 4.    AC 1-10.   What class of operation is the most efficient? 1.    A 2.    C 3.    AB 4.    AC 1-11.   What class of operation has the highest fidelity? 1.    A 2.    C 3.    AB 4.    AC 1-12.   What is the purpose of an amplifier- coupling network? 1.    To "block" d.c. 2.    To provide gain between stages 3.    To separate one stage from another 4.    To transfer energy from one stage to another 1-13.   Which of the following is NOT a method of coupling amplifier stages? 1.    RC 2.    Resistor 3.    Impedance 4.    Transformer 1-14.   What is the most common form of coupling? 1.    RC 2.    Resistor 3.    Impedance 4.    Transformer 1-15.   Which of the following types of coupling is usually used to couple the output from a power amplifier? 1.    RC 2.    Resistor 3.    Impedance 4.    Transformer 1-16.   Which of the following types of amplifiers have both high and low frequency response limitations? 1.    RC 2.    Resistor 3.    Impedance 4.    Transformer 1-17.   Which of the following types of coupling is most effective at high frequencies? 1.    RC 2.    Resistor 3.    Impedance 4.    Direct THIS SPACE LEFT BLANK INTENTIONALLY.