Controls in the management are tied.
a) ‘Controls’ refers to many supervisions in many areas / departments? or
b) it refers to the controls held by different people in different years.
Not sure what you mean. Management control is what management supervises or has responsiblity for.
2. Extremes of temperature restrict infiltration
It is usually seen as "Temperature extremes"
so it would be b) ‘Extremes’ refers to a general occurrence? Plural form can be used to denote an event which is generally known??
Student or Learner