How does an air-defrost system work?
A) Hot compressor discharge gas is routed to the evaporator.
B) A warm glycol solution is sprayed on the coil.
C) Air from inside the store is directed over the evaporator.
D) The superheated gas leaving the evaporator is used to melt the ice.
C
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What is a component that uses or changes electric energy and limits current flow?
a. Conductor b. Insulator c. Load d. Control device
A(n) ____________________ gauge pin is often used as the datum feature simulator for a datum target point.
What will be an ideal response?
Technician Parker worked 9.25 hours one day completing 2 repair jobs. He spent 
? of the time on the first job. How much time was spent on the first job?
Fill in the blank(s) with the appropriate word(s).
The load connected to the motor is a constant torque of 20 Nm. The total moment of inertia of the entire drive system is 1 Nm sec2 . The voltage of the motor at starting is 150 V.
A 500 V, dc shunt motor has the following parameters:
a. Calculate and plot the motor speed versus time.
b. Calculate the motor speed after 5 seconds.
c. Calculate the starting time.
d. The motor reaches the steady-state speed, and the terminal voltage is at full
value. To decrease the motor speed, the terminal voltage is reduced by 10% while
the field remains constant. Calculate the traveling time.