Question

A says that many thermostats are marked to indicate which way the coolant should flow through them.

B says a thermostat that is not marked to indicate direction should be installed so that the thermal element is pointed toward the radiator

-A
-B
-Both
-Neither

Answer 1

Both A and B. Thermostats that are marked indicate the direction of coolant flow, while those without markings should be installed with the thermal element pointed towards the radiator.

Step-by-step explanation:

Thermostats are devices that control the flow of coolant through a system, such as a car's engine. Some thermostats are marked to indicate the direction in which the coolant should flow. This is important because if the coolant flows in the wrong direction, it can lead to engine damage. So, statement A is correct that many thermostats are marked to indicate the direction of coolant flow.

On the other hand, a thermostat that is not marked to indicate direction can still be installed correctly. In this case, the thermal element of the thermostat should be pointed towards the radiator. This is because the thermal element is responsible for sensing the temperature and opening or closing the thermostat accordingly. By pointing it towards the radiator, it will be in direct contact with the coolant and able to sense the temperature accurately.

Therefore, the correct answer to the question is Both A and B.