Pick up the incorrect statement regarding a master trap from the following: (A) It is provided in between the lower end of the house drain and the street sewer (B) It is provided a cleaning eye at the top of the trap (C) The mica flap valve which opens inwards only, is fitted at the top of the inlet pipe (D) The water seal is less than that of ordinary traps

Pick up the incorrect statement regarding a master trap from the following:
(A) It is provided in between the lower end of the house drain and the street sewer
(B) It is provided a cleaning eye at the top of the trap
(C) The mica flap valve which opens inwards only, is fitted at the top of the inlet pipe
(D) The water seal is less than that of ordinary traps
by

1 Answer

Answer :

(D) The water seal is less than that of ordinary traps
by

Related questions

Pick up the correct statement from the following: (A) In a gully trap, a water seal of 6 to 7.5 cm is provided (B) The gully trap collects waste water from the kitchen, sink, wash basins, etc. (C) The gully trap disconnects the sullage drain from the main drainage system (D) The grating provided over gully traps is 23 cm square

Description : Pick up the correct statement from the following: (A) In a gully trap, a water seal of 6 to 7.5 cm is provided (B) The gully trap collects waste water from the kitchen, sink, wash basins ... the sullage drain from the main drainage system (D) The grating provided over gully traps is 23 cm square

Last Answer : (B) The gully trap collects waste water from the kitchen, sink, wash basins, etc.

The trap which is provided to disconnect the house drain from the street sewer is called (A) Master trap (B) Intercepting trap (C) Interception manhole (D) All the above

Description : The trap which is provided to disconnect the house drain from the street sewer is called (A) Master trap (B) Intercepting trap (C) Interception manhole (D) All the above

Last Answer : (D) All the above

Antisyphonage pipe is fitted A. At the end of septic tanks B. On manholes C. With a W.C. trap D. At the beginning of sewer line

Description : Antisyphonage pipe is fitted A. At the end of septic tanks B. On manholes C. With a W.C. trap D. At the beginning of sewer line

Last Answer : ANS: C

Pick up the incorrect statement from the following: (A) Tresguet did not provide the top camber for the drainage of surface water (B) Tresguet provided the top camber for the drainage of surface water (C) Telford provided two layers of stones in the central 5.4 m width and one layer was provided on the sides (D) Macadam provided a camber to the formation at the dug-up state, to drain percolated water

Description : Pick up the incorrect statement from the following: (A) Tresguet did not provide the top camber for the drainage of surface water (B) Tresguet provided the top camber for the drainage of surface ... (D) Macadam provided a camber to the formation at the dug-up state, to drain percolated water

Last Answer : Answer: Option A

Pick up the incorrect statement from the following: (A) The retaining wall should be structurally capable to resist the applied earth pressure (B) The section of the retaining wall should be so proportioned that it may not overturn by the lateral pressure (C) The retaining wall should be safe against sliding (D) To drain off water from the earth retained, weep holes are provided near the top of the retaining wall

Description : Pick up the incorrect statement from the following: (A) The retaining wall should be structurally capable to resist the applied earth pressure (B) The section of the retaining wall should be so ... off water from the earth retained, weep holes are provided near the top of the retaining wall

Last Answer : Answer: Option D

Air inlet valve in water mains, is generally provided at (A) Summit of the pipe (B) Upstream of sluice valve (C) Downstream of sluice valve (D) Both (a) and (c) of above

Description : Air inlet valve in water mains, is generally provided at (A) Summit of the pipe (B) Upstream of sluice valve (C) Downstream of sluice valve (D) Both (a) and (c) of above

Last Answer : (D) Both (a) and (c) of above

In a typical medium speed 4- stroke Diesel engine, the inlet valve A. opens 20°before top dead centre and closes at 35°afterthebottomdead centre. B. opens up at top dead centre and closes at bottomdead centre C. may open orcloseanywhere D. remains open for 200°

Description : In a typical medium speed 4- stroke Diesel engine, the inlet valve A. opens 20°before top dead centre and closes at 35°afterthebottomdead centre. B. opens up at top dead centre and closes at bottomdead centre C. may open orcloseanywhere D. remains open for 200°

Last Answer : ANSWER : A

Pick up the incorrect statement from the following regarding fire hydrants (A) Fire hydrants are fitted in water mains at 100 m to 150 m apart at fire (B) The minimum water pressure hydrants, is kept 1.5 kg/cm2 (C) The water at pressure 1 to 1.5 kg/cm2 is made available for 4 to 5 hours for constant use (D) None of these

Description : Pick up the incorrect statement from the following regarding fire hydrants (A) Fire hydrants are fitted in water mains at 100 m to 150 m apart at fire (B) The minimum water pressure hydrants, is kept 1.5 kg/ ... to 1.5 kg/cm2 is made available for 4 to 5 hours for constant use (D) None of these

Last Answer : (D) None of these

In the method of tube boring of soil investigation, the following is essential: (A) A tube of about 2 metres length and 20 cm diameter with a cutting edge (B) A flap valve at the bottom of tube is provided to extract the soil sample (C) The tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand (D) All the above

Description : In the method of tube boring of soil investigation, the following is essential: (A) A tube of about 2 metres length and 20 cm diameter with a cutting edge (B) A flap valve at the bottom of tube is ... and lowered by 4 thick rope moving over a pulley suspended on a tripod stand (D) All the above

Last Answer : Answer: Option D

In centrifugal pump installation, (A) Pump is properly primed before starting (B) The diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe (C) The motor may burn out if it is started with empty delivery pipe and with open gate valve (D) All the above

Description : In centrifugal pump installation,  (A) Pump is properly primed before starting  (B) The diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe  (C) The ... out if it is started with empty delivery pipe and with open gate valve  (D) All the above 

Last Answer : (D) All the above 

The valves provided at low points of pipes to drain off water quickly under gravity, are called (A) Blow off valves (B) Drain valves (C) Sewer valves (D) All the above

Description : The valves provided at low points of pipes to drain off water quickly under gravity, are called (A) Blow off valves (B) Drain valves (C) Sewer valves (D) All the above

Last Answer : (D) All the above

The valve fitted closely in a recess against an opening in a pipe, is generally (A) Wedge shaped circular disc (B) Spherical disc (C) Parallelepiped disc (D) Conical shaped circular disc

Description : The valve fitted closely in a recess against an opening in a pipe, is generally (A) Wedge shaped circular disc (B) Spherical disc (C) Parallelepiped disc (D) Conical shaped circular disc

Last Answer : (A) Wedge shaped circular disc

Pick up the correct statement from the following: A. The boning rod is used for checking the levels of the sewer inverts B. Manhole covers are made circular for the convenience of the cleaning staff C. A manhole is classified as shallow manhole if its depth is less than 0.9 m D. All the above

Description : Pick up the correct statement from the following: A. The boning rod is used for checking the levels of the sewer inverts B. Manhole covers are made circular for the convenience of the cleaning staff C. A manhole is classified as shallow manhole if its depth is less than 0.9 m D. All the above

Last Answer : ANS: D

Which one of the following statements regarding septic tanks is wrong? A. A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided B. The outlet invert level is kept 5 to 7.5 cm below the inlet invert level C. The minimum width of septic level is 90 cm D. The depth of tank is kept equal to its width

Description : Which one of the following statements regarding septic tanks is wrong? A. A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided B. The outlet invert level is kept ... . The minimum width of septic level is 90 cm D. The depth of tank is kept equal to its width

Last Answer : ANS: D

Pick up the incorrect statement from the following: (A) In the stem of a retaining wall, reinforcement is provided near the earth side (B) In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab (C) In the heel slab of a retaining wall, reinforcement is provided at the top of the slab (D) None of these

Description : Pick up the incorrect statement from the following: (A) In the stem of a retaining wall, reinforcement is provided near the earth side (B) In the toe slab of a retaining wall, reinforcement is ... slab of a retaining wall, reinforcement is provided at the top of the slab (D) None of these

Last Answer : Answer: Option D

A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is (A) Δp (B) < Δp (C) > Δp (D) Δp

Description : A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is (A) Δp (B) < Δp (C) > Δp (D) Δp

Last Answer : (C) > Δp

Pick up the correct statement from the following: (A) The internal pressure within a pipe, is caused due to water head and hammer pressure (B) In pressure pipes with water at rest, the pressure is equal to water head (C) Sudden closure of a valve, causes the water hammer pressure (D) All the above

Description : Pick up the correct statement from the following:  (A) The internal pressure within a pipe, is caused due to water head and hammer pressure  (B) In pressure pipes with water at rest, the pressure ... (C) Sudden closure of a valve, causes the water hammer pressure  (D) All the above 

Last Answer : (D) All the above 

The theodolites used for making tacheometric observations by optical wedge system, are (A) Provided with stadia hairs in front of eye piece (B) Not provided with stadia hairs at all (C) Fitted with a glass wedge inside the telescope (D) Fitted with a glass wedge in front of telescope

Description : The theodolites used for making tacheometric observations by optical wedge system, are (A) Provided with stadia hairs in front of eye piece (B) Not provided with stadia hairs at all (C) Fitted with a glass wedge inside the telescope (D) Fitted with a glass wedge in front of telescope

Last Answer : (D) Fitted with a glass wedge in front of telescope

Drop manholes at the junctions of sewer lines, are provided if A. Invert level of a branch sewer is more than 60 cm that of the main sewer B. Sewer line runs along a main road C. Ordinary manhole cannot be built D. Two sewer lines intersect

Description : Drop manholes at the junctions of sewer lines, are provided if A. Invert level of a branch sewer is more than 60 cm that of the main sewer B. Sewer line runs along a main road C. Ordinary manhole cannot be built D. Two sewer lines intersect

Last Answer : ANS: A

Pick up the incorrect statement from the following for allowing workers to enter sewers A. The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes B. Proper tests for the presence of poisonous gases must be carried out C. The men entering the manhole should be advised to smoke in the sewer D. Warning signals should be erected

Description : Pick up the incorrect statement from the following for allowing workers to enter sewers A. The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 ... entering the manhole should be advised to smoke in the sewer D. Warning signals should be erected

Last Answer : ANS: C

Pick up the incorrect statement from the following: (A) The bottom and top ends of slump mould are parallel to each other (B) The axis of the mould is perpendicular to the end faces (C) The internal surface of the mould is kept clean and free from set cement (D) The mould is in the form of a frustum of hexagonal pyramid

Description : Pick up the incorrect statement from the following: (A) The bottom and top ends of slump mould are parallel to each other (B) The axis of the mould is perpendicular to the end faces (C) The ... clean and free from set cement (D) The mould is in the form of a frustum of hexagonal pyramid

Last Answer : Answer: Option D

Anti-siphonage pipe is connected to (A) Main soil pipe (B) Bottom of P trap W.C. (C) Top of P trap W.C. (D) Side of water closet

Description : Anti-siphonage pipe is connected to (A) Main soil pipe (B) Bottom of P trap W.C. (C) Top of P trap W.C. (D) Side of water closet

Last Answer : (C) Top of P trap W.C.

At the socket and spigot joint, (A) Enlarged end of the pipe is called socket (B) Normal end of the pipe is called spigot (C) Spigot is fitted into the socket (D) All the above

Description : At the socket and spigot joint, (A) Enlarged end of the pipe is called socket (B) Normal end of the pipe is called spigot (C) Spigot is fitted into the socket (D) All the above

Last Answer : (D) All the above

Pick up the incorrect statement from the following: (A) The flow in strainer type wells is radial (B) The flow in cavity type wells in spherical(C) In strainer type wells, area of flow depends upon the length of the strainer pipe (D) In cavity type wells, area of flow depends upon the size of the cavity

Description : Pick up the incorrect statement from the following:  (A) The flow in strainer type wells is radial  (B) The flow in cavity type wells in spherical  (C) In strainer type wells, area of flow ... pipe  (D) In cavity type wells, area of flow depends upon the size of the cavity 

Last Answer : (C) In strainer type wells, area of flow depends upon the length of the strainer pipe 

Pick up the in-correct statement from the following: A. Manholes are provided in sewer pipes at suitable intervals B. Catch basins are generally provided in sewers for carrying drainage discharge C. Inlets are generally provided in all sewers D. None of these

Description : Pick up the in-correct statement from the following: A. Manholes are provided in sewer pipes at suitable intervals B. Catch basins are generally provided in sewers for carrying drainage discharge C. Inlets are generally provided in all sewers D. None of these

Last Answer : ANS: C

Traps A. Are water seals which prevent the entry of foul gases B. Are used to trap the rats entering sewers C. Dissolve the foul gases D. Create symphonic action to increase the quick disposal of sewerage

Description : Traps A. Are water seals which prevent the entry of foul gases B. Are used to trap the rats entering sewers C. Dissolve the foul gases D. Create symphonic action to increase the quick disposal of sewerage

Last Answer : ANS: A

Pick up the correct statement from the following: (A) The ratio of the total sediment deposited in the reservoir to the total sediment flowing in the river, is called trap efficiency (B) Small capacity reservoirs on large rivers generally, silt less (C) Large capacity reservoirs on small rivers generally silt more (D) All the above

Description : Pick up the correct statement from the following:  (A) The ratio of the total sediment deposited in the reservoir to the total sediment flowing in  the river, is called trap efficiency  ( ... less  (C) Large capacity reservoirs on small rivers generally silt more  (D) All the above

Last Answer : (D) All the above

In distribution pipes, drain valves are provided at (A) Lower point (B) Higher point (C) Junction points (D) Anywhere

Description : In distribution pipes, drain valves are provided at (A) Lower point (B) Higher point (C) Junction points (D) Anywhere

Last Answer : (A) Lower point

Pick up the incorrect statement from the following: (A) Highways are always constructed in straight line (B) Highways may be provided horizontal curves (C) Highways may be provided vertical curves (D) Highways may be provided both horizontal and vertical curves

Description : Pick up the incorrect statement from the following: (A) Highways are always constructed in straight line (B) Highways may be provided horizontal curves (C) Highways may be provided vertical curves (D) Highways may be provided both horizontal and vertical curves

Last Answer : Answer: Option A

Pick up the incorrect statement from the following: (A) In dog-legged stairs, no space between its flights is provided (B) In open newel stair, a rectangular well is provided (C) In geometric stair, a curved shaped well between forward and backward flights, is provided (D) In geometrical stair, two quarter space landing is provided

Description : Pick up the incorrect statement from the following: (A) In dog-legged stairs, no space between its flights is provided (B) In open newel stair, a rectangular well is provided (C) In ... forward and backward flights, is provided (D) In geometrical stair, two quarter space landing is provided

Last Answer : Answer: Option D

Pick up the incorrect statement from the following: (A) Horizontal D.P.C. is provided at plinth level in internal walls (B) D.P.C. is provided under door and verandah openings (C) Vertical D.P.C. is not provided in internal walls (D) Cement concrete is a rigid damp-proofing material

Description : Pick up the incorrect statement from the following: (A) Horizontal D.P.C. is provided at plinth level in internal walls (B) D.P.C. is provided under door and verandah openings (C) Vertical D.P.C. is not provided in internal walls (D) Cement concrete is a rigid damp-proofing material

Last Answer : Answer: Option B

Pick up the correct statement from the following: (A) A confined bed of impervious material laid over an aquifer, is known as an aquiclude (B) The top most water bearing strata having no aquifer, is known as non-artesian aquifer (C) The ordinary gravity wells which supply water from the top most water bearing strata, are called water table wells (D) All the above

Description : Pick up the correct statement from the following: (A) A confined bed of impervious material laid over an aquifer, is known as an aquiclude (B) The top most water bearing strata having no aquifer, is ... water from the top most water bearing strata, are called water table wells (D) All the above

Last Answer : Answer: Option D

Pick up the correct statement from the following regarding radial flow centrifugal pumps: (A) These are provided with volute type or turbine type casings (B) In involute type of radial flow centrifugal pump, the impeller discharges into a gradually expanding spiral casing (C) The efficiency of turbine type of radial flow centrifugal pump, is always higher than that of volute type (D) All the above

Description : Pick up the correct statement from the following regarding radial flow centrifugal pumps:  (A) These are provided with volute type or turbine type casings  (B) In involute type of radial flow ... centrifugal pump, is always higher than that of  volute type  (D) All the above 

Last Answer : (D) All the above 

The size of inlet valve of an engine in comparison to exhaust valve is A. more B. less C. same D. varies from design to design

Description : The size of inlet valve of an engine in comparison to exhaust valve is A. more B. less C. same D. varies from design to design

Last Answer : ANSWER : B

Pick up the incorrect statement from the following: (A) The pH value of water indicates the logarithm of reciprocal of hydrogen ion concentration in water (B) Higher value of pH means lower hydrogen ion concentration (C) Lower value of pH means higher hydrogen ion contraction (D) Lower value of pH gives alkaline solution

Description : Pick up the incorrect statement from the following:  (A) The pH value of water indicates the logarithm of reciprocal of hydrogen ion concentration in  water  (B) Higher value of pH ... value of pH means higher hydrogen ion contraction  (D) Lower value of pH gives alkaline solution 

Last Answer : (D) Lower value of pH gives alkaline solution 

What is Flap Valve?

Description : What is Flap Valve?

Last Answer : Answer: A non return valve having a hinged disc or rubber or leather flap used for low pressure lines.

Pick up the correct statement from the following: A. The water supply pipes carry pure water free from solid particles B. The water supply pipes get clogged if flow velocity is less than self cleansing velocity C. The sewers may be carried up and down the hills and valleys D. The sewer pipes are generally laid along level hills

Description : Pick up the correct statement from the following: A. The water supply pipes carry pure water free from solid particles B. The water supply pipes get clogged if flow velocity is less than self ... carried up and down the hills and valleys D. The sewer pipes are generally laid along level hills

Last Answer : ANS: A

In a pressure penstock 4500 m long, water is flowing at a velocity of 4 m/s. If the velocity of the pressure wave traveling in the pipe, due sudden complete closure of a valve at the downstream end, is given as 1500 m/s, what would be the period of oscillation in second under frictionless conditions? (a) 6 (b) 8 (c) 9 (d) 11

Description : In a pressure penstock 4500 m long, water is flowing at a velocity of 4 m/s. If the velocity of the pressure wave traveling in the pipe, due sudden complete closure of a valve at the downstream end, is ... period of oscillation in second under frictionless conditions? (a) 6 (b) 8 (c) 9 (d) 11

Last Answer : (a) 6

A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle

Description : A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle

Last Answer : Answer: Option C

Pick up the correct statement from the following: A. The sewer pipes of sizes less than 0.4 m diameter are designed as running full at maximum discharge B. The sewer pipes of sizes greater than 0.4 m diameter are designed as running 2/3rd or 3/4th full at maximum discharge C. The minimum design velocity of sewer pipes is taken as 0.8 m/sec D. All the above

Description : Pick up the correct statement from the following: A. The sewer pipes of sizes less than 0.4 m diameter are designed as running full at maximum discharge B. The sewer pipes of sizes greater than 0.4 m ... discharge C. The minimum design velocity of sewer pipes is taken as 0.8 m/sec D. All the above

Last Answer : ANS: D

If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is A. 2 hours B. 3 hours C. 4 hours D. 5 hours

Description : If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is A. 2 hours B. 3 hours C. 4 hours D. 5 hours

Last Answer : ANS: C

If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is A. 2 hours B. 4 hours C. 6 hours D. 8 hours

Description : If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is A. 2 hours B. 4 hours C. 6 hours D. 8 hours

Last Answer : ANS: D

Pick up the correct statement from the following: (A) Hornblende mineral is brittle (B) Muscovite is also known as white mica and potash mica (C) Biotite is also known as black-mica (D) All the above

Description : Pick up the correct statement from the following: (A) Hornblende mineral is brittle (B) Muscovite is also known as white mica and potash mica (C) Biotite is also known as black-mica (D) All the above

Last Answer : Answer: Option D

The sewer pipe which carries sewage from a building for immediate disposal is A. House sewer B. Lateral sewer C. Intercepting sewer D. Main sewer

Description : The sewer pipe which carries sewage from a building for immediate disposal is A. House sewer B. Lateral sewer C. Intercepting sewer D. Main sewer

Last Answer : ANS: A

A device known as a _______ is used to release condensate from the pipework whilst preventing the steam from escaping from the system. a. Steam traps b. Steam pipes c. Boiler nose d. Release valve

Description : A device known as a _______ is used to release condensate from the pipework whilst preventing the steam from escaping from the system. a. Steam traps b. Steam pipes c. Boiler nose d. Release valve

Last Answer : a. Steam traps

Pick up the correct statement from the following: A. The larger the sewer in size, more will be velocity B. The smaller the sewer in size, less will be velocity C. The larger the sewer in size, no deposition will take place D. The larger the sewer in size, deposition will take place

Description : Pick up the correct statement from the following: A. The larger the sewer in size, more will be velocity B. The smaller the sewer in size, less will be velocity C. The larger the sewer in size, no deposition will take place D. The larger the sewer in size, deposition will take place

Last Answer : ANS: D

Select the wrong statement (A) An equivalent pipe is treated as an ordinary pipe for all calculations (B) The length of an equivalent pipe is equal to that of a compound pipe (C) The discharge through an equivalent pipe is equal to that of a compound pipe (D) The diameter of an equivalent pipe is equal to that of a compound pipe

Description : Select the wrong statement (A) An equivalent pipe is treated as an ordinary pipe for all calculations (B) The length of an equivalent pipe is equal to that of a compound pipe (C) The discharge ... of a compound pipe (D) The diameter of an equivalent pipe is equal to that of a compound pipe

Last Answer : Answer: Option D

Which one among the following statements regarding India's coal is not correct? [CDS 2012] (a) 98 percent of reserves of coal in India belongs to Gondwana period (b) Unknown amount of coal lies buried under the Ganga alluvium and the Deccan Trap (c) Bituminous coal is found in both lower Gondwana rocks and in Tertiary rocks (d) Gondwana coal is mainly found in the river valleys of Damodar, Mahanadi and Godavari

Description : Which one among the following statements regarding India's coal is not correct? [CDS 2012] (a) 98 percent of reserves of coal in India belongs to Gondwana period (b) Unknown amount of coal ... Tertiary rocks (d) Gondwana coal is mainly found in the river valleys of Damodar, Mahanadi and Godavari

Last Answer : Ans: (c)