Technician A says that a vacuum leak can cause a rough idle or stalling. Technician B says that spark knock (ping or detonation) is often caused by a too rich air-fuel mixture or an excessively low engine operating temperature. Which technician is correct?

Technician A says when measuring rear suspension curb riding height, the vehicle should be parked on a level floor. Technician B says excessive rear curb riding height causes reduced directional stability. Who is correct?

A. A only B. B only C. Both A and B D. Neither A nor B

Production records are less effective than visual appraisal for improving reproductive and growth of livestock

Indicate whether this statement is true or false.

Crosshatching that is too steep (less than 60 degrees) will allow oil to run down the cylinder wall; too flat (more than 20 degrees) causes too thick an oil film.

Answer the following statement true (T) or false (F)

What contaminants must be removed prior to joint fit-up?

A) mill scale B) rust C) varnish D) paint E) none of the above