May I suggest some additional tests?
Before they send out the grads into the big wide world.
Q1 - your customer has a faulty line and their premises are open every day of the week except Tuesday. Which day should the engineer not attend because no one will be there?
Q2 - you continue to bill a customer two years after they request the circuit to be ceased. You finally realise your mistake and send the customer a cheque. Do you a) write the correct payee on the cheque or b) the incorrect payee?
Q3 - You tell prospective customers they cannot get Superfast fibre optic broadband even though they already have it. How do you win back the situation?
Q4 - you can't install a line as the postcode given doesn't exist. Even though you already have lines in the building. How do you win back the situation?
Q5 - in order to run new fibre into a building you require a permission to dig form to be signed by the customer. Do you a) email the form blank and expect the customer to guess the details or b) email the form blank so the customer fills it out incorrectly then blame the customer for the delay to the project?
Q6 - you have local planners that know the local network inside out. Do you a) keep them in their role or b) lay them off and centralise the service so the nearest planner works 150 miles away?
Q7 - you employ engineers with years of experience who have good working relationships with their customer base. Do you a) keep them or b) let them go and get inexperienced straight out of college engineers to replace them (not forgetting to train them to sell)
There maybe more but this'll do to start. Anyone care to add?