Answer: four inches
The chariot of Yudhishthira is always about four inches above the ground because he never swerved from the path of Dharma and Truth. The Chariot sank back to the ground when he told the One Lie to Drona.
From Quiz: The Mahabharata
Answer: elephant
Ashvathama, Drona's son, was immortal. There was an elephant in the war by the name of Ashvathama. Bheema slew this elephant and went around the battlefield proclaiming that he had slain Ashvathama. When Drona heard this, he went to Yudhistira and asked him if what Bheema had declared was true. Yudhistira said that Ashvathama had been killed, but if it was an elephant or man, he did not know. But Drona did not hear the last part and in his grief, laid down his weapons and started meditating. Dhristadyumna, sensing the opportunity, slew Drona.
From Quiz: The Great War (The Mahabharatha II)
Answer: Urvashi
Urvashi, the apsara, wanted to marry Arjuna. Arjuna declined as the immortal apsara had been married to one of Arjuna's ancestors. Urvashi cursed Arjuna that he would have to spend a part of his life as a eunuch.
From Quiz: Mahabharata -The Greatest Epic Part 2
Answer: To Drona that his son was dead
The elevated chariot of Yudhishthira sank back to the ground when he told Drona that his son Aswatthama was dead. Bheema had actually killed an elephant called Ashwatthama. But to make Drona put down his weapons and give his army a chance to kill Drona, Yudhishthira had to lie for the sake of his army. This was considered great Adharma because, Drona specifically asked Yudhishthira for the truth; he knew Yudhishthira would never lie to anybody. Later on, this lie was excused by Krishna.
From Quiz: The Mahabharata
Answer: Ashvathama
After Duryodhana had fallen in the mace fight against Bheema, Ashvathama came to him. Before dying, Duryodhana made Ashvathama his commander and made him promise that he would bring the five severed heads of the Pandavas to him.
From Quiz: The Great War (The Mahabharatha II)
Answer: Gambling
Gambling was a major weakness of Yudhishtra. Shakuni and Duryodhana exploited this.
From Quiz: Mahabharata -The Greatest Epic Part 2
Answer: Shantanu
Bhishma was the son of Ganga and Shantanu. He was the eighth son. All his brothers/sisters were killed by Ganga. He was brought up by the Ganga river in heavens.
From Quiz: The Mahabharata
Answer: Kritvarma
Kritvarma was actually the commander of the Narayani Sena, under Krishna, but when Duryodhana had taken over the Narayani Sena, Kritvarma had to fight on Duryodhana's side.
From Quiz: The Great War (The Mahabharatha II)
Answer: Bheemasena
Bheema accomplished his vow in the great battle of the kurus which followed.
From Quiz: Mahabharata -The Greatest Epic Part 2
Answer: Susharma
Susharma was the one who kept distracting Arjuna when he tried to protect his army from the wrath of Bhishma and Drona.
From Quiz: The Mahabharata