महाराष्ट्र अभियंता सेवा (स्थापत्य) पूर्व परीक्षा २०१५

When a ship enters sea from a river one can expect it :

An Acquifer confined at the bottom but open at the top is known as

Which of the following pollutant gases is produced due to anaerobic decomposition of organic matter in biological waste product ?

The chemical characterization of solid waste includes : 

When, Iron and Manganese are present in combination with organic matter in water;they shall be removed by:

(a) Aeration
(b) Coagulation

(c) Addition of lime
(d) Addition of chlorine

The colour of water for domestic supplies on standard platinum cobalt scale should not exceed :

A sedimentation tank is to be designed for a given capacity. The velocity of flow is 0.2 m/min and a detention period of 6 hours is to be considered. The length of the tank should be :

Acceptable noise level for residential and business urban areas as per IS 4954-1968 is :

Following instruments are used to measure Turbidity characteristics of water :

(a) Jackson's Turbidimeter

(b) Baylis Turbidimeter

(d) Ratio Turbidimeter

(c) Nephelometer 

Dechlorination of water is achieved by adding :
(a) Sodium thiosulphate
(b) Sodium sulphite
(c) Sodium hexametaphosphate

(d) Sodium bisulphate

The solubility of oxygen in sewage when compared to its solubility in distilled water is :

Pollutant Standard Index (PSI) value greater than 100 upto 199, denotes the air quality as :

The chemical compounds which are responsible for production of photochemical smog are :

A 50 um size particle is removed from gas by :

BOD (Bio-chemical Oxygen Demand) test is carried out for 5 days at a constant temperature of :

Slow sand filter removes bacteria to as much as :

The unit for measuring the frequency of sound is :

Desire lines are plotted in :

Where 'p' is the pressure sustained in  2 and '△' is deflection in cm, then with reference to rigid pavement the modulus of subgrade reaction is given by :

Maximum equivalent single wheel load as per IRC is :