How does a pressure-time-temperature defrost system measure frost?
A) The system has a timing circuit that controls the defrost thermostat.
B) The system has a reversing valve that controls the defrost thermostat.
C) The system has a timer control triggered by pressure drop.
D) The system has a differential airflow pressure switch.
D
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All refrigeration compressors are designed to pump:
A) Mostly vapor plus small quantities of liquid. B) Only vapor. C) Mostly liquid with small quantities of vapor. D) Only liquid.
What is the BCD form of 438 in odd parity?
A) 0100000110100 B) 0100001110001 C) 1010000111000 D) 1000001101000
Match each item with a statement below.
A. Applications that are made available to users over the Internet B. Development platforms that are made available to developers over the Internet C. Implementation in which a service provider makes computing resources available over the Internet D. Implementation in which several organizations share computing resources E. A RAID implementation that protects against data loss due to disk failure F. A RAID implementation that protects against loss of data access due to a single component's failure G. Implementation of RAID Level 1 H. Allows you to reboot a system from a CD-ROM I. Bulk transfer of data in batches to an off-site facility
Given v? = 45 sin(?t + 30°) V and v? = 50 cos(?t – 30°) V, determine the phase angle between the two sinusoids and which one lags the other.
What will be an ideal response?