Technician A says that when bolting 5th wheel angle iron brackets to a tractor frame the bolts should be spaced 12-inches apart. Technician B says that 5th wheel angle iron brackets should be bolted to a tractor frame using SAE Grade 8 bolts of at least 5/8-inch. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: B
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One method used by circuit breakers to sense circuit current is to connect a(n) ____ in series with the load.
A. battery B. ammeter C. coil D. resistor
Technician A says that when an ECU is exposed to voltage spikes its circuitry can be damaged. Technician B says that because of the sensitivity of chassis electronic systems, great care should be exercised when connecting break-out box and diagnostic Tee-connectors into a circuit. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
A thermistor is a nonlinear device which changes its terminal resistance value as its surrounding temperature changes. The resistance and temperature generally have a relation in the form of Rth(T ) = R0e??(T?T0) where Rth = resistance at temperature T, ? R0 = resistance at temperature T0 = 298 K, ? ? = material constant, K?1 T, T0 = absolute temperature, K a. If R0 = 300? and ? = ?0.01 K?1, plot Rth(T ) as a function of the surrounding temperature T for 350 ? T ? 750. b. If the thermistor is in parallel with a 250-? resistor, find the expression for the equivalent resistance and plot Rth(T ) on the same graph for part a.
What will be an ideal response?
Some isometric drawings can be developed with more detail if both of the construction lines are drawn at what degrees from the horiziontal.
A. 180 B. 90 C. 60 D. 30