Sail E0 Webinar

MCQs

Total Questions : 579 | Page 7 of 58 pages
Question 61. Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
  1.    biological oxygen pond.
  2.    radial settling tank (thickener) using coagulant (lime & ferrous sulphate).
  3.    lagoons.
  4.    filtration.
 Discuss Question
Answer: Option B. -> radial settling tank (thickener) using coagulant (lime & ferrous sulphate).
Answer: (b).radial settling tank (thickener) using coagulant (lime & ferrous sulphate).
Question 62. Persons working in cement plants and limestone quarries are more prone to disease like
  1.    cancer
  2.    asthma
  3.    silicosis
  4.    flourosis (bone disease)
 Discuss Question
Answer: Option C. -> silicosis
Answer: (c).silicosis
Question 63. Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called
  1.    fumes
  2.    mists
  3.    smoke
  4.    aerosols
 Discuss Question
Answer: Option D. -> aerosols
Answer: (d).aerosols
Question 64. Operating principle of cyclone separator is based on the action of __________ dust particles.
  1.    diffusion of
  2.    centrifugal force on
  3.    gravitational force on
  4.    electrostatic force on
 Discuss Question
Answer: Option B. -> centrifugal force on
Answer: (b).centrifugal force on
Question 65. Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
  1.    hydrogen sulphide
  2.    mercury
  3.    cadmium
  4.    asbestos
 Discuss Question
Answer: Option C. -> cadmium
Answer: (c).cadmium
Question 66. Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause
  1.    explosion
  2.    non biodegradable foam
  3.    undesirable plant growth
  4.    corrosion
 Discuss Question
Answer: Option A. -> explosion
Answer: (a).explosion
Question 67. Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.
  1.    90
  2.    120
  3.    150
  4.    180
 Discuss Question
Answer: Option B. -> 120
Answer: (b).120
Question 68. Presence of soluble organics in polluted water causes
  1.    undesirable plants growth.
  2.    depletion of oxygen.
  3.    fire hazards.
  4.    explosion hazards.
 Discuss Question
Answer: Option B. -> depletion of oxygen.
Answer: (b).depletion of oxygen.
Question 69. Which of the following pollutants, if present in atmosphere is detectable by its odour ?
  1.    CO
  2.    SO₂
  3.    NO₂
  4.    CO₂
 Discuss Question
Answer: Option B. -> SO₂
Answer: (b).SO₂
Question 70. Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
  1.    with greater number of blades.
  2.    of increased diameter.
  3.    both (a) & (b).
  4.    neither (a) nor (b).
 Discuss Question
Answer: Option C. -> both (a) & (b).
Answer: (c).both (a) & (b).

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0