Free Practice Question
CR · Critical Reasoning
555-605
Assumptions
The only physical factor preventing a human journey to Mars has been weight. Carrying enough fuel to propel a conventional spacecraft to Mars and back would make even the lightest craft too heavy to be launched from Earth. A device has recently been invented, however, that allows an otherwise conventional spacecraft to refill the craft’s fuel tanks with fuel manufactured from the Martian atmosphere for the return trip. Therefore, it is possible for people to go to Mars in a spacecraft that carries this device and then return.
Which one of the following is an assumption on which the argument depends?
Which one of the following is an assumption on which the argument depends?
Answer Choices
Sign in to reveal the correct answerA
The amount of fuel needed for a spacecraft to return from Mars is the same as the amount of fuel needed to travel from Earth to Mars.
B
The fuel manufactured from the Martian atmosphere would not differ in composition from the fuel used to travel to Mars.
C
The device for manufacturing fuel from the Martian atmosphere would not take up any of the spaceship crew’s living space.
D
A conventional spacecraft equipped with the device would not be appreciably more expensive to construct than current spacecraft typically are.
E
The device for manufacturing fuel for the return to Earth weighs less than the tanks of fuel that a conventional spacecraft would otherwise need to carry from Earth for the return trip.
Reveal the correct answer
Sign in for free to check your answer and unlock the full explanation.
Track your performance and improve
Get detailed analytics, unlock full explanations, and move up difficulty tiers as you practice.
Explanation
Unlock the full explanation
Create a free account to reveal the correct answer, see the step-by-step explanation, and start tracking your GMAT progress.
Comments
Sign in to join the discussion
No comments yet
Be the first to share your thoughts and help others understand it better.
Sign in to commentDetails
Difficulty
555-605
Type
CR