Why is a vacuum line attached to a fuel-pressure regulator on many port-fuel-injected engines?
A) To raise the fuel pressure at idle
B) To create an equal pressure drop across the injectors
C) To lower the fuel pressure under heavy engine load conditions to help improve fuel economy
D) To draw fuel back into the intake manifold through the vacuum hose
B
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When leveling a crane using a standard carpenter’s level, how should it be placed?
a. In two positions, 90 degrees apart b. In three positions, 120 degrees apart c. In four positions, 90 degrees apart d. In six positions, 60 degrees apart
?While discussing a positive-displacement gear type pump: Technician A says use a straight edge and feeler gauge to check gear side clearance. Technician B says normally the maximum clearance is 0.15 inch. Who is correct?
A. ?A only B. ?B only C. ?Both A and B D. ?Neither A nor B
When working with refrigerant lines, which of these wrenches is LEAST likely to round the edges of fasteners?
A) Box end wrench B) Line wrench C) Combination wrench D) None of these
In the circuit of Fig. 7.140, find v? and i?, given that vs = 10[1 – e^–t]u(t) V.
 FIGURE 1.png)