www.paformusic.info Self-Test Quiz No.2

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	1.  An RCD protects against: a. Overloading the mains supply b. Excessive earth leakage currents c. Short-circuits between Live and Neutral d. Overheating due to loose power connections
	2.  VCA group fader settings: a. Are used to adjust the level of audio group output signals b. Affect post-fade auxiliary mixes but not pre-fade ones c. Do not affect any auxiliary mixes d. Affect only auxiliary mixes
	3.  A 2-channel amplifier has a maximum output power of 800 W per channel, into 4 ohms. In 2-channel mode, a given drive signal and sensitivity setting produces an output power of 250 W per channel into 8 ohm loads. If a single 8 ohm load is now connected to the amplifier in bridged mode, the power supplied to that load for the same drive signal and sensitivity setting will be in the region of: a. 250 W b. 500 W c. 800 W d. 1000 W e. 1600 W
	4.  If the minimum permissible 2-channel load impedance of the amplifier in the previous question is 4 ohms, what is its maximum output power in bridged mode? a. 800 W b. 1000 W c. 1600 W d. 2000 W e. 3200 W
	5.  The EIN of a microphone pre-amp, expressed in dBu, will be: a. A large positive value b. A small positive value c. Zero d. A small negative value e. A large negative value
	6.  'X-Y pair' is an example of: a. Coincident microphone technique b. Operating two auxiliaries of a mixer in stereo mode c. Supplying a secondary set of speakers with a delayed signal d. Using top and bottom microphones on a snare drum
	7.  If the compression ratio of a compressor is set to 4:1, and is operating above its threshold, an increase in input signal level of 12 dB will give an increase in output signal level of: a. 12 dB b. 8 dB c. 4 dB d. 3 dB
	8.  If a digital signal level is at a value of −10 dB FS then the headroom is: a. −10 dB b. −5 dB c. 0 dB d. 5 dB e. 10 dB
	9.  The slope of a 3rd-order filter is: a. 12 dB per octave b. 18 dB per octave c. 24 dB per octave d. 30 dB per octave
	10.  A CEE-form connector for 3-phase power is coloured: a. Red b. Green c. Yellow d. Blue
	11.  A speaker cabinet contains 8 identical drivers, each rated at 150 W and 8 ohms impedance. The drivers are arranged in sets of 2. The two drivers of each pair are connected in series. The four paired sets are connected in parallel. The overall impedance of the cabinet is: a. 2 ohms b. 4 ohms c. 8 ohms d. 16 ohms d. 32 ohms
	12.  The overall power rating of the cabinet in the above question is: a. 150 W b. 300 W c. 600 W d. 1200 W
	13.  A peaking equaliser is set to a centre frequency of 600 Hz and a Q of 4. The bandwidth of the affected frequencies is: a. 150 Hz b. 300 Hz c. 600 Hz d. 2400 Hz

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This page last updated 03-Feb-2016.