If a cooling system operates at too cool of a temperature, the ...

[LaDunn]

If a cooling system operates at too cool of a temperature, the engine will ________.
 
  A) Have more efficiency B) Pre-ignite or detonate
  C) Produce higher emissions D) Produce more torque

Question 2

The use of a coolant recovery machine is helpful in preventing ________ from entering the cooling system.
 
  A) Oil B) Excessive vibrations
  C) Air D) Hose residue

[succesfull]

Answer to Question 1

C

Answer to Question 2

A