Why is minimizing duct restriction so important?
A) The system cannot operate properly against excessive air restriction.
B) Incorrect terminal velocities can cause discomfort.
C) Excessive restriction can increase operating cost.
D) Excessive restriction causes excessive noise.
A
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Ultrasonic inspection (UT) is a nondestructive test. This method is based upon magnetic induction in which a magnetic field induces eddy currents within the material being tested.
Answer the following statement true (T) or false (F)
Answer the following statement(s) true (T) or false (F)
1. Reversing the motor with a VFD is as simple as inserting a selector switch between the DCM and digital input #2 terminals. 2. The relay outputs are similar to the auxiliary contacts on magnetic motor starters. 3. The main difference between the output relays of VFDs and auxiliary contacts of magnetic motor starters is that the user cannot define which operating parameter the relays are programmed to report. 4. The term commissioning simply means to put into service.
Screw threads can be represented on drawings in three different ways. Which of the following is NOT one of the three ways?
A. Detailed B. Schematic C. Isometric D. Simplified
An IAT is being tested. After the vehicle has been allowed to cool for several hours, a scan tool is used to observe the IAT sensor reading. When compared to the engine coolant temperature (ECT), the two temperatures should be within how many degrees F of each other?
A) 15 B) 10 C) 25 D) 5