Technician A says that coolant leaks can be located by performing a pressure test on the system. Technician B says that when pressure testing the cooling system, you should pressurize it to at least 10 psi (69 kPa) above the radiator cap pressure rating. Who is correct

What is the chief metrological difference between measuring with a microscope and with an electronic comparator? a. the microscope is limited to small workpieces.a. the microscope is limited to small workpieces. c. the comparator can only examine one point on the workpiece. d. the microscope carries its own standard.