Two technicians are discussing the testing of a catalytic ...

[daltonest1984]

Two technicians are discussing the testing of a catalytic converter. Technician A says that a vacuum gauge can be used and observed to see if the vacuum drops with the engine at idle for 30 seconds. Technician B says that a pressure gauge can be used to check for backpressure. Which technician is correct?
 
  A) Technician A only B) Technician B only C) Both technicians D) Neither technician

Question 2

EGR systems ________.
 
  A) Are used on all vehicles B) Reduce NOx emissions
  C) Both A and B D) Neither A nor B

[ntsoane kedibone]

Answer to Question 1

B

Answer to Question 2

B