Question

multiple choice 1 point
a customer is experiencing a growling noise coming from the engine bay. which tool would be the most useful in determining the source of the noise?
obd ii scan tool.
mechanics stethoscope
chassis ear
dvom

8 multiple choice 1 point
which piece of safety equipment should be used with hydraulic jacks?
jack stands
safety crane
cinder blocks
drive on ramps

9 multiple choice 1 point
which thread repair insert looks like a metal bushing and creates a complete seal?
a helicoil
a timesert
a tap
a die

Explanation:

1. A mechanics stethoscope is designed to listen to engine - related noises and help identify the source of the noise in the engine bay. OBD II scan tools are for diagnosing electronic issues, chassis ears are for different types of noise detection not as specific for engine bay noises, and DVOM (Digital Volt - Ohm Meter) is for electrical measurements.
2. Jack stands are used to support a vehicle after it has been lifted by a hydraulic jack for safety, preventing the vehicle from falling. Safety cranes are for lifting heavy objects, cinder blocks are not proper safety equipment for jacks, and drive - on ramps are a different type of vehicle - lifting device.
3. A timesert looks like a metal bushing and creates a complete seal for thread repair. A helicoil is also a thread repair insert but does not create a complete seal like a timesert. A tap is for cutting threads and a die is for threading external surfaces.

Answer:

1. Mechanics stethoscope
2. Jack stands
3. a timesert