Which of the following may contribute to detonation?
A. A lean air/fuel ratio
B. A rich air/fuel ratio
C. A malfunctioning EGR system
D. Both A and C
Answer: D
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What is the hottest section of the furnace?
A) Damper B) Radiant tubes C) Firebox D) Refractory
Mr. Allison has 895 acres of farmland. Eighty-eight percent of the farmland is planted in grain. Fifty-five percent of the grain planted is corn.
a. How many acres are in grain? b. How many acres are in corn?
For a long-run gable roof, it is recommended that you start in the center rather than at one end or the other
because _____. a. this provides a slight slope from the center to help drain excess water from the roof b. there is less chance of misalignment in both directions c. composition shingles must be overlapped from side to side, starting from a center shingle d. you cannot accurately measure the space between courses on the ends of the roof
Some circuits employ the use of normally open auxiliary contacts to prevent motor 2 from starting before motor 1, and motor 3 cannot start before motor2. These normally open auxiliary contacts that control the starting sequence are often called ____contacts.
A. automatic B. permissive C. energizing D. overload