When multiple compressors are installed in parallel on the same refrigeration system, provisions must be made to ensure that:
A) The oil level is correct in all compressors.
B) All compressors pull the same amount of current.
C) The refrigerant flow is equal through all compressors.
D) All compressors start and stop at the same time.
A
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Heat that can be measured or sensed is referred to as:
a. latent heat of vaporization b. latent heat of condensation c. sensible heat d. latent heat of fusion
A device that converts a nonelectrical impulse such as sound, heat, light, or pressure into an electrical signal is called:
A) A sensor. B) A switch. C) An actuator. D) A sending unit.
Coated electrodes were introduced by:
A) Hobart Welding B) Miller Electric C) ESAB equipment D) Lincoln Electric
Reactive power (Pr) in a capacitor is defined as the rate at which a capacitor stores or returns energy and is measured in:
A) watts reactive. B) volt-ampere reactive. C) volts per time constant. D) current per time constant.