D. United States
Correct Answer: C. Russia
Detailed About MCQs
For the first time, Russia has conducted a successful flight test of the MGTD-20 gas turbine engine, which is a 3D-printed aircraft engine.
As per the Russian Foundation for Advanced Research Projects in the Defense Industry, the production of the engines is scheduled for the year 2021-2022. The bench tests of small-sized gas turbine aircraft 3-D printing technology engines were reported in 2019.