Environment Quiz 4
Practice quiz on Environment (General Science). 5 real exam questions.
About This Quiz
Environment Quiz 4 — Questions with Solutions
All 5 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.
Q1.Which one is a renewable source of energy?
- A.Coal
- B.Petroleum
- C.Wind
- D.Natural Gas
Show answer
Answer: C. Wind
Wind is renewable.
Q2.The BOD of treated sewage should generally be:
- A.≤ 10 mg/L
- B.10–20 mg/L
- C.20–30 mg/L
- D.40–50 mg/L
Show answer
Answer: C. 20–30 mg/L
Effluent BOD ideally < 30 mg/L (Indian norms).
Q3.World Environment Day is observed on:
- A.5 June
- B.8 March
- C.2 October
- D.15 August
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Answer: A. 5 June
Environment Day is on June 5.
Q4.Which part of the plant prepares food?
- A.Root
- B.Stem
- C.Leaf
- D.Flower
Show answer
Answer: C. Leaf
Leaves prepare food through photosynthesis.
Q5.In a waste stabilization pond, the main process responsible for treatment is:
- A.Coagulation
- B.Aerobic digestion
- C.Solar disinfection
- D.Sedimentation
Show answer
Answer: B. Aerobic digestion
Algae-oxygen cycle promotes aerobic digestion.
Frequently Asked Questions
Is Environment Quiz 4 free to attempt on AajExam?
Yes. Environment Quiz 4 is completely free. You only need a free AajExam account to track your score, view detailed solutions and unlock cross-attempt analytics.
How long does it take to complete Environment Quiz 4?
Environment Quiz 4 runs on a 1-minute timer in real exam-style conditions. The clock starts the moment you click Start, mirroring the time pressure of the actual exam.
Are detailed solutions provided?
Yes. Every question on Environment Quiz 4 ships with a complete step-by-step solution, the underlying concept, and (where applicable) shortcut tricks. You can also discuss any question with the AajExam community.
Can I attempt Environment Quiz 4 multiple times?
Yes. You can attempt this quiz as many times as you like. Each attempt is recorded separately so you can track improvement in score, accuracy and time-management.
Which government exams does this quiz prepare me for?
Environment questions appear regularly in SSC CGL, CHSL, MTS, GD; IBPS PO, Clerk; SBI PO, Clerk; RRB NTPC, Group D; UPSC prelims and most State PSC exams. The specific weightage varies by exam — check the exam pattern on the corresponding AajExam exam page for details.