How is turbojet Thrust Specific Fuel Consumption TSFC affect

How is turbojet Thrust Specific Fuel Consumption (TSFC) affected by outside air temperature?

TSFC worsens with decreasing temperature

TSFC is unaffected by changes in temperature

TSFC improves with decreasing temperature

Solution

TSFC improves with decrasing in tempeature.

Reason.

The air which is intaken by engine is compressed where is its temperature decreases and pressure increases. Air flow ratio is dependent on temperature of the inlet air. As temperature increases the air flow rate decreases in volume. so at low temperature the air flow ratio increases .