Where is the decimal system of dimensioning used and why?
What will be an ideal response?
The decimal system of dimensioning is used almost exclusively in industry because of the ease with which computations can be made. In addition, the dimension can be measured with precision instruments to a high degree of accuracy and is required for Computer Numerical Control (CNC) applications.
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A residential A/C system that cools in summer and heats in winter by reversing the flow of refrigerant is called a:
A) Stand-alone A/C system B) Heat pump C) Window unit D) PTAC system
According to Kirchhoff?s voltage law, the total voltage drop in a circuit is equal to the _____
A) voltage of the power source B) total resistance in the circuit C) current divided by resistance D) total current in the circuit
Modern oil burners are referred as high pressure burners, as the oil is delivered through the burner at a pressure of about ___ psi.
Fill in the blank(s) with the appropriate word(s).
In a high-temperature refrigeration unit, the boiling point of the refrigerant in the coil is normally ____ lower than the cabinet temperature.
A. 10°F to 20°F B. 25°F to 35°F C. 35°F to 46°F D. 5°F to 15°F