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RAS question

PSLV-DL configuration has how many strap-on boosters?

Correct answer: (D) 2.

PSLV-DL uses 2 strap-on boosters.

  1. (A)

    6

  2. (B)

    4

  3. (C)

    0

  4. (D)

    2

Explanation

PSLV-DL is the dual-strap-on configuration of ISRO's Polar Satellite Launch Vehicle. ISRO's PSLV page identifies the strap-on booster variants directly: PSLV-XL uses 6 extended strap-ons, PSLV-CA is the Core Alone version with no strap-on motors, PSLV-DL uses 2, and PSLV-QL uses 4. That makes option D the only match for PSLV-DL. The point tested here is not the number of stages or the payload role of PSLV, but the naming convention of the launch-vehicle configuration: CA means no strap-ons, DL means two, QL means four, and XL/G use six in their respective forms.

Why the other options are wrong

  • (A) 6 strap-on boosters belong to the six-strap-on PSLV configurations, not to PSLV-DL.
  • (B) 4 strap-on boosters identify PSLV-QL, whereas PSLV-DL is the two-strap-on variant.
  • (C) 0 strap-on boosters describe PSLV-CA, the Core Alone version, not PSLV-DL.

Concept

This tests basic space-technology awareness under launch vehicles, especially ISRO vehicle configurations. RAS repeats such facts because configuration names like CA, DL, QL and XL are easy to confuse in current-affairs-linked science questions.

Source

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