Question 51General Subjects - Assistant Engineer

The correct answer is B) Radiation pyrometer. A radiation pyrometer is the most suitable temperature transmitter for measuring running gear bearing temperatures in a diesel engine because it does not require direct contact with the bearing. Radiation pyrometers measure the infrared radiation emitted by the object, allowing for non-contact temperature measurement. This is important for monitoring bearing temperatures, as direct contact could interfere with the operation of the running gear. The other options are not as suitable: A) Thermistor probes and C) Resistance temperature detectors require direct contact with the object, while D) Thermocouple pyrometers are typically used for higher temperature measurements beyond the range of a diesel engine's running gear.