Technician A says that a helical gear is stronger than a spur gear. Technician B says that a helical gear is noisier that a spur gear. Which technician is correct?

Most modern crop varieties are patented to protect the intellectual property of those who developed them

Indicate whether the statement is true or false

A bolt that is threaded into a casting is often called a ________

A) Cap screw B) Stud C) Block bolt D) Crest bolt

What is a potential complication that is unique to brazing?

A) Heating the joint before the pipe can result in an improper fit. B) Improper cleaning of the pipe can reduce bonding. C) Overheating the pipe can result in excessive oxidation. D) Overheating the pipe can result in leakage.

Undersized suction lines:

A) Can cause poor oil return because of high refrigerant velocity. B) Can reduce system efficiency because of a high pressure drop. C) Can reduce system efficiency because of a low pressure drop. D) Can cause poor oil return because of low refrigerant velocity.