Final answer:
A fillet weld is a triangular weld used to join two surfaces at a right angle, while a groove weld is placed in the groove between two members to be joined. The exceptions to using fillet and groove welds are T-Y-K-CJP groove welds.
Step-by-step explanation:
In the context of welding, a fillet weld is a triangular weld that joins two surfaces at a right angle. It is commonly used to join two plates or to attach a plate to a curved surface. A groove weld, on the other hand, is a weld that is placed in the groove between two members that are to be joined. Both fillet and groove welds are commonly used in various welding applications.
However, the statement in the question specifies that the exceptions to using fillet and groove welds are T-Y-K-CJP groove welds. This refers to a particular type of groove weld called a CJP (complete joint penetration) groove weld, which is used for certain joints that require full penetration. T-Y-K here refers to the type of groove and the condition of the joint being prepared for welding.