Question

10 multiple choice 1 point which tool is the most common tool a technician will use to repair threads without cutting or removing metal? thread chaser die tap helicoil 11 multiple choice 1 point a technician is using a refractometer to measure the concentration of antifreeze after replacing a radiator. the refractometer says the coolant has a freezing point of -10f. what is the approximate concentration of antifreeze to water? 50%:50% 33%:67% 39%:61% 25%:75% 12 multiple choice 1 point two technicians are working on replacing a fuel line. technician a says to use an open ended wrench to loosen the fuel line. technician b states a flare nut wrench should be used because the ears on the flare nut wrench will prevent the fastener from rounding. who is correct? technician a only technician b only. both technician a and b neither technician a or b.

Explanation:

1. A thread chaser is used to clean and repair threads without cutting or removing metal. A die cuts external threads, a tap cuts internal threads, and a helicoil is used to repair damaged threads by installing a new insert.
2. A coolant with a freezing - point of - 10°F typically has an antifreeze - to - water ratio of approximately 33% antifreeze and 67% water.
3. Flare nut wrenches have ears that grip the flats of the fastener more securely and prevent rounding, making Technician B correct. Open - ended wrenches are more likely to cause the fastener to round.

Answer:

1. thread chaser
2. 33%:67%
3. Technician B only.