Dev controlled the bout from the first minute and in the second round he continued to land punches that put his opponent on a complete back foot and never let any pressure get to him.
A cautious performance in the third round put the result beyond doubt.
Of the 10 Indian athletes competing in Bangkok, Sachin Siwach (57kg) and Abhimanyu Rohra (80kg) recorded contrasting victories on the first and second days of competition, while Amit Panghal (51kg), Sanjeet (92kg), Narender (over 92kg) and women boxers Jasmin Rambohria (57kg) and Arundhati Choudhury (66kg) were given exemptions from the first round.
On Monday, Ankushita Boro will face Mongolia's Namoon Mongkol in the 60kg category, while Abhimanyu Rolla will face Ireland's Kerryn Cassidy in the round of 32 in the 80kg category.
India has so far secured three quota places for boxing at the Paris 2024 Olympics through Tokyo 2020 bronze medallist Lovlina Borgohain (women's 75kg), two-time world champion Nikhat Zareen (women's 50kg) and Priti Pawar (women's 54kg).
However, because National Olympic Committees have the exclusive right to represent their country at the Olympic Games, an athlete's participation in Paris will depend on that country's NOC selecting an athlete to represent their country in Paris 2024.
India has fielded seven men and three women in the second World Olympic Qualifier in a bid to score more points. Paris 2024 Olympics allocation.
In the Thailand tournament, three spots will be contested in the women's 60kg, men's 57kg and men's 80kg weight classes. Five spots will be awarded each to the men's 63.5kg and 71kg classes, while four spots will be awarded each to the remaining nine weight classes.
Indian boxers were defeated in the first World Boxing Qualification Tournament held in Busto Arsizio, Italy in March.
