More than 1,000 Alexandria Democrats turned out yesterday to select a slate of six candidates for the spring city-wide council elections.

Incumbents James Moran and Donald Casey polled second and third, respectively. Voters also selected accountant Lionel Hope, one of two black nominees on the nine-person Democratic ticket and the top vote-getter yesterday; Patsy Ticer, an Old Town resident and PTA activist; Richard Leibach, a career counselor and West End resident; and transportation lawyer Mark Pestronk, a longtime member of the city's Landlord-Tenant Board.

All six candidates were endorsed by the American Federation of State, County and Municipal Employees. Hope, who works for the University of the District of Columbia, won the backing of retiring black council member Nelson Greene, for whom Hope once served as campaign treasurer.

The three who did not survive the vote were Alexandria attorneys Dorothea Peters and Tony Trenga and businessman George Pope.

Alexandria's Democratic committee decided earlier this year to hold a mass meeting instead of the usual primary, saying it was less expensive because there is only one voting place.

The Democrats crowded the auditorium at the Frances Hammond School on Seminary Road to hear the nine nominees and then cast their votes. The nominees hammered at the Reagan budget cuts.

Moran said the cuts will force the city to become more self-sufficient and to think of itself as more than a bedroom community of Washington.

He and others supported attracting more jobs to the city, providing better education and maintaining the city's ethnic diversity and its mix of high- and low-income housing.