Examkin

Soru

Zorluk: KolayIdentifying Implied Meanings

During winter months, maintenance crews storing diesel exhaust fluid (DEF) in unheated sheds fill storage tanks to only two-thirds capacity. DEF is an aqueous urea solution composed primarily of purified water. Unlike petroleum fuels that simply thicken in sub-zero weather, water-based solutions expand significantly when transitioning from liquid to solid ice.

Based on the passage, what is the implied reason technicians leave one-third of the storage tank empty?

  1. To allow space for the fluid to expand without rupturing the container upon freezingCevap
  2. B
    To prevent the fluid from thickening like petroleum-based fuels during cold weather
  3. C
    To leave space for adding petroleum-based heating additives later in the winter
  4. D
    To reduce the overall weight of the storage tank to make it easier to relocate

Cevap

To allow space for the fluid to expand without rupturing the container upon freezing
The passage notes that DEF is mostly water and that water-based solutions expand significantly when freezing in unheated winter conditions. Leaving unfilled space in the tank allows the freezing liquid to expand safely without building pressure and cracking the tank walls.

Adım Adım Çözüm

1
Identify key facts presented in the passage
DEF consists mainly of water, water-based solutions expand when turning to ice, and tanks are kept only two-thirds full in cold sheds.
Establishing the explicitly stated premises provides the basis for deduction.
2
Connect the physical behavior of the fluid to the storage practice
If the fluid freezes in the unheated shed, its volume will increase.
The author contrasts water expansion with fuel thickening to highlight the volumetric change upon freezing.
3
Deduce the unstated purpose of leaving empty space
Leaving one-third of the tank empty accommodates the volume increase so the expanding ice does not damage the tank.
Connecting fluid expansion to container capacity logically yields the implied safety measure.

Anahtar Kavram

Identifying Implied Meanings
Tahmini Süre:45s
Bu soruyu puanla

Konular

Identifying Implied Meanings

Bu konudan daha fazla soru