"...as Catholics we have a crucial contribution to make to this democratic process," he said.
In his questions, the bishop echoed Pope Francis and Benedict XVI's concern for the environment when he posed the question: "How will they care better for the environment, promoting an 'integral ecology' with a simpler lifestyle?"
He also asked voters to consider whether candidates support family values, efforts to help the homeless, and the care of the mentally ill.
"And tenthly, how will they foster peace, justice and development abroad, whilst encouraging our Government to stand up for Christians who are being persecuted in such places as Syria and Egypt?"
He also encouraged his people to think about their role as missionary disciples, and in particular to pray for vocations to the priesthood, which "do not come out of thin air", but from prayer and fasting, he said.
"Please pray for more priests. Why not say the Rosary for this intention? Or offer up your Friday abstinence? Or if you watch a football match, ask God to call one of the players or one of the fans?"
He concluded by asking his people to trust in the Lord and offered prayers for the country ahead of the elections.
"In (Sunday's) Gospel, Jesus said: 'Do not let your hearts be troubled. Trust in God still and trust in me.' We believe that Jesus Christ is the Way, the Truth and the Life. He calls each of of us to discern our vocation and to play our part. As we approach the General Election, let us pray for our country."