What are the three factors that determine induced voltage?
What will be an ideal response?
The three factors that determine induced voltage are:
• Strength of magnetic field (In this instance, the flux density of the pole pieces)
• Length of conductor (Also stated as number of turns of wire. In this instance, it is the number of turns of wire in the armature winding.)
• Speed of the cutting action (Armature speed)
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A(n) ____ weld is identified by reference to a detail drawing in the tail of the welding symbol.
A. plug B. slot C. section D. edge
Technician A says that dynamic voltage is the voltage (usually of a battery) that exists without a load being applied. Technician B says that open circuit voltage (OCV) is the voltage of the power source (battery) with the circuit in operation. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Why do large ammonia chillers in large scale food processing plants often use a glycol secondary refrigerant?
A) To maintain a lower compression ratio B) To maintain a higher compression ratio C) To achieve low temperatures because ammonia will not reach sub-freezing temperatures alone D) To avoid ammonia spills by limiting the ammonia charge to the chiller
Electronic temperature sensors can be:
A) Generally less accurate than bimetal thermometers. B) Thermocouple, thermistor, or wire-wound. C) Thermistor, bimetal, or charged bulb. D) Bimetal, mercury bulb, or piezoelectric.