Q1#1. Instrument transformers normally:AConvert 14 volts DC to 26 volts ACBReduce the A.C supply to 26 volts for some instruments.CChange 115 volts to 200 volts for engine instruments.DConvert 28 volts DC to 28 volts AC
Q2#2. An auto-transformer:Avaries its turns ratio automatically to maintain a constant output voltage with varying input voltage.Bhas only one coil which is used as both primary and secondaryCwill maintain a constant output frequency with a varying supply frequencyDrequires an inductive supply.
Q3#3. A step-up transformer is one in which the number of turns on the secondary winding is:Athe same as the primary if the cable diameter is the sameBgreater than that on the primary.Cless than on the primaryDalways the same as on the primary