Yeah that's 40 lbs.
Most brehs in here can probably curl 35 to 50 lbs on just one arm.
40 lb preacher curls is acceptable if you're doing high reps....but that doesn't make sense unless you are on a rowing team and need the muscular endurance.
If breh is lifting for hypertrophy....well, he's got a ways to go but we all gotta start somewhere.