Which installation errors commonly reduce dryer efficiency?

Which installation errors commonly reduce dryer efficiency?

• A. Short runs, many bends, improper diameter, and weak joints.
• B. Long runs, few bends, proper diameter, and strong joints.
• C. Long runs, many bends, proper diameter, and strong joints.
• D. Short runs, few bends, proper diameter, and strong joints.

Answer: (A)

The main idea is that dryer efficiency drops when the exhaust path creates more resistance or leaks. Key installation mistakes that cause this are long duct runs, many turns, an improper duct size, and weak joints, because each of these factors makes it harder for air to flow and increases energy needed to push it out. The best choice among the options is the one that includes many bends, an improper diameter, and weak joints, since these are the specific errors that most directly reduce airflow and allow leaks. Short runs, by themselves, are not typically a source of inefficiency and are usually favorable, while the other options describe configurations that are closer to good practice (minimal bends, correct size, solid joints).

The main idea is that dryer efficiency drops when the exhaust path creates more resistance or leaks. Key installation mistakes that cause this are long duct runs, many turns, an improper duct size, and weak joints, because each of these factors makes it harder for air to flow and increases energy needed to push it out. The best choice among the options is the one that includes many bends, an improper diameter, and weak joints, since these are the specific errors that most directly reduce airflow and allow leaks. Short runs, by themselves, are not typically a source of inefficiency and are usually favorable, while the other options describe configurations that are closer to good practice (minimal bends, correct size, solid joints).