2011 CSAT, all questions

UPSC Prelims 2011 · CSAT

Question 11: Logical Reasoning and Mental Ability

Directions for the following 2 (two) items : Each of the following two items consists of four statements. Of these four statements, two cannot both be true, but both can be false. Study the statements carefully and identify the two that satisfy the above condition. Select the correct answer using the codes given below each set of statements : Examine the following statements :

  1. 1.All trains are run by diesel engine.
  2. 2.Some trains are run by diesel engine.
  3. 3.No train is run by diesel engine.
  4. 4.Some trains are not run by diesel engine.

Codes :

a1 and 2
b2 and 3
c1 and 3
d1 and 4

UPSC published no Prelims answer keys before 2012.

Practise this paper timedPrevious questionNext question

Source: UPSC, Civil Services (Preliminary) Examination 2011, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.