The time by which the activity completion time can be delayed without affecting the start of succeeding activities, is Known as________?

Preheating is essential in welding ________?

A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are________?

The theoretically correct air fuel ratio for petrol engine is of the order of________?

The ideal efficiency of a Brayton cycle without regeneration with increase ni pressure ratio will________?

Aqua ammonia is used as refrigerant in the following type of refrigeration system________?