When testing a relay using an ohmmeter, which two terminals should be touched to measure the coil resistance?

A) 86 and 85
B) 86 and 87
C) 87 and 30
D) 87a and 87


A) 86 and 85

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Which of the following is true of hold-off pressure in most current truck and trailer air brake systems?

A. maintained at 60 psi B. regulated at 90 psi C. subject to chassis system pressure D. dumped when service brake is applied

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Solve and reduce all answers to lowest terms:  1/9 + 4/9 + 2/9 =

Fill in the blank(s) with the appropriate word(s).

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The second virial coefficient (B) describes what about a system? Why is it normally negative?

What will be an ideal response?

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Where are shorting bars used?

A) In the airbag controller B) In the crash sensors C) In pretensioners D) At the connectors for airbags

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