So UCTA 1977 stands for the Unfair Contracts Act. For your exam the significance is that UCTA states that in a business to business contract exclusion clauses will not be valid if an exclusion clause attempts to exclude liability for causing death or personal injury.
CRA is the Consumer Rights Act. For your exam the significance is that the CRA implies terms into contracts and it also states that exclusion clauses excluding liability for death or personal injury is void but this time in a consumer contract.