1. The permissible pH range for drinking water according to PEQS is:
(A) 5.5 – 9.5
(B) 6 – 8
(C) 7 – 9
(D) 6.5 – 8.5
2. Maximum allowable Turbidity in drinking water is:
(A) 5 NTU
(B) 1 NTU
(C) 10 NTU
(D) 15 NTU
3. According to PEQS, the maximum Nitrate (NO₃⁻) concentration in drinking water is:
(A) 10 mg/L
(B) 50 mg/L
(C) 45 mg/L
(D) 60 mg/L
4. The permissible Total Dissolved Solids (TDS) in drinking water should not exceed:
(A) 500 mg/L
(B) 1000 mg/L
(C) 1200 mg/L
(D) 1500 mg/L
5. Maximum allowable Lead (Pb) in drinking water is:
(A) 0.01 mg/L
(B) 0.1 mg/L
(C) 0.05 mg/L
(D) 0.2 mg/L
6. Residual Chlorine in drinking water should be:
(A) 0.2 – 0.5 mg/L
(B) 0.1 – 0.2 mg/L
(C) 0.5 – 1.0 mg/L
(D) 1 – 2 mg/L
7. The permissible Arsenic (As) concentration in drinking water is:
(A) 0.1 mg/L
(B) 0.05 mg/L
(C) 0.01 mg/L
(D) 0.2 mg/L
8. Maximum Fluoride (F⁻) allowed in drinking water is:
(A) 1.5 mg/L
(B) 1.0 mg/L
(C) 0.5 mg/L
(D) 2.0 mg/L
9. Maximum permissible Coliform bacteria count in drinking water is:
(A) 10 per 100 mL
(B) 1 per 100 mL
(C) 5 per 100 mL
(D) 0 per 100 mL
10. According to PEQS, maximum water hardness (as CaCO₃) is:
(A) 300 mg/L
(B) 200 mg/L
(C) 100 mg/L
(D) 500 mg/L