JUNIOR INSTRUCTOR(PLUMBER) – CAT NO 163/2018 – INDUSTRIAL TRAINING DEPARTMENT

PROVISIONAL ANSWER KEY
Question Paper Code: 45/2019/OL
Category Code: 163/2018
Exam: Junior Instuctor (Plumber)
Medium of Question: English
Date of Test 03-10-2019
Department Industrial Training Department
Alphacode A
Question1:-The water closet having an integral part of trap S and P type out let have a water seal size of …..
A:-25 mm
B:-50 mm
C:-75 mm
D:-100 mm
Correct Answer:- Option-C
Question2:-Which type of tap is used for hot and cold water pipe line in a system …..?
A:-Stop cock
B:-2 or 3 in mixer tap
C:-one in one mixer
D:-Direct mix of the O H T
Correct Answer:- Option-B
Question3:-Collar joint shall be finished of with a fillet sloping at a surface angle of …..
A:-15°
B:-25°
C:-35°
D:-45°
Correct Answer:- Option-D
Question4:-Sewer pipe may have to be laid under the condition of …..
A:-Cushion
B:-Trench
C:-Length
D:-Threading
Correct Answer:- Option-B
Question5:-A device used in kitchens serving hotels dinning rooms club houses and restaurants is …..
A:-Grease basin
B:-Yard basins
C:-Garage basin
D:-Oil catch basin
Correct Answer:- Option-A
Question6:-In a hot water system expansion / vent pipes are installed on the cylinder and boiler because they…..
A:-Prevent air locks
B:-Stop build up of lime
C:-Supply cold water
D:-Release excess steam and water
Correct Answer:- Option-D
Question7:-The pump attached with impeller and pump is …..
A:-Mono block pump
B:-Jet pump
C:-Air lift pump
D:-Rotary pump
Correct Answer:- Option-A
Question8:-For cutting thin tubing the most suitable pitch of the hack saw blade is …..
A:-1.8 mm
B:-0.8 mm
C:-1.4 mm
D:-.1 mm
Correct Answer:- Option-B
Question9:-The hose pipe for the oxygen line is …..
A:-Black
B:-Maroon
C:-Red
D:-Brown
Correct Answer:- Option-A
Question10:-Dual systems of distribution means …..
A:-Continues supply system
B:-pumping and intermittent system
C:-Gravity and Pumping system
D:-Gravity and continues system
Correct Answer:- Option-C
Question11:-The space between the teeth of a handsaw is called …..
A:-Gullet
B:-Kert
C:-Flank
D:-Pitch
Correct Answer:- Option-A
Question12:-Which bond is commonly used for …..
A:-Stretcher bond
B:-Header bond
C:-Flemish bond
D:-English bond
Correct Answer:- Option-D
Question13:-The clearance angle of a drill is …..
A:-3° to 5°
B:-8° to 12°
C:-12° to 20°
D:-15° to 20°
Correct Answer:- Option-B
Question14:-What is usually the included angle of the conical point of a scriber …..
A:-15°
B:-30°
C:-60°
D:-90°
Correct Answer:- Option-A
Question15:-One pascal is equal to …..
A:-1 Newton/mm²
B:-1 Newton/m²
C:-1 Newton/cm²
D:-1 Newton/dm²
Correct Answer:- Option-B
Question16:-Ferrous metal is an alloy of …..
A:-iron and silicon
B:-carbon and silicon
C:-iron and carbon
D:-manganese and silicon
Correct Answer:- Option-C
Question17:-In which pipes are used in water providing plants …..
A:-C.I. Pipe
B:-G.I. Pipe
C:-A.C. Pipe
D:-S.W. Pipe
Correct Answer:- Option-A
Question18:-Cast iron is used for manufacturing machine beds because …..
A:-It is heavy in weight
B:-It can resist more compressive stress
C:-It is a cheaper metal
D:-It is a brittle metal
Correct Answer:- Option-B
Question19:-A device installed in a drainage system to prevent reverse flow is …..
A:-back water valve
B:-back flow preventer
C:-back siphonage
D:-back vent pipe
Correct Answer:- Option-A
Question20:-In metric micro meters what is the pitch of the spindle thread
A:-0.1 mm
B:-0.5 mm
C:-0.2 mm
D:-0.01 mm
Correct Answer:- Option-B
Question21:-What is the term generally employed for a piece of pipe which is threaded on both ends and less than 12 inches
long?
A:-coupling
B:-nipple
C:-union
D:-plugs
Correct Answer:- Option-A
Question22:-Pipe wrench is used for pipes of diameter…..
A:-less than 15 mm
B:-more than 150 mm
C:-50 mm to 150 mm
D:-15 mm to 50 mm
Correct Answer:- Option-D
Question23:-If the globe valve begins to leak between the packing nut and valve steam …..
A:-gland nut to be replaced
B:-packing to be replaced
C:-valve steam to be replaced
D:-Bonnet to be replaced
Correct Answer:- Option-B
Question24:-the lower most level or surface of a sewer is known as …..
A:-invert
B:-bedding
C:-benching
D:-drain
Correct Answer:- Option-A
Question25:-What process is used to remove permanent hardness in water …..
A:-purification process
B:-coagulation process
C:-base exchange process
D:-sedimentation process
Correct Answer:- Option-C
Question26:-Dug wells are also known as …..
A:-draw wells
B:-tube wells
C:-driven wells
D:-artesian wells
Correct Answer:- Option-A
Question27:-What should be done to remove tapped air in centrifugal pump …..
A:-packing
B:-washing
C:-use booster pump
D:-priming
Correct Answer:- Option-D
Question28:-What is provided in elevated storage reservoir for circulation of air …..
A:-manhole
B:-ventilator
C:-float gauge
D:-over flow pipe
Correct Answer:- Option-B
Question29:-What type of bacteria treats waste in percolation area?
A:-fungi
B:-anaerobic
C:-aerobic
D:-lime
Correct Answer:- Option-C
Question30:-The cistern which is operated by a chain is called …..
A:-Ball type cistern
B:-Bell type cistern
C:-Pull type cistern
D:-Push type cistern
Correct Answer:- Option-B
Question31:-Hardness that cannot be removed by boiling the water is called
A:-difficult hardness
B:-stiff hardness
C:-permanent hardness
D:-tough hardness
Correct Answer:- Option-C
Question32:-Galvanized iron is coated with …..
A:-Copper
B:-Lead
C:-Zinc
D:-Tin
Correct Answer:- Option-C
Question33:-What you should be sure you have in plenty before considering buying a solar water heater
A:-abundant sunshine
B:-very hot water
C:-intermittent rain
D:-all of the above
Correct Answer:- Option-A
Question34:-There are two primary chemicals used to purify water namely …..
A:-iodine and chlorine
B:-sodium and chlorine
C:-chlorine and fluorine
D:-fluorine and iodine
Correct Answer:- Option-A
Question35:-Which material is used for joining C.I. Pipes?
A:-Lead and cement
B:-Lead and lead wool
C:-Zinc and lead wool
D:-Copper and hemp yarn
Correct Answer:- Option-B
Question36:-What is used at the junction of house sewer and municipal sewer?
A:-nahni trap
B:-P. trap
C:-Intercepting trap
D:-S. trap
Correct Answer:- Option-C
Question37:-What is used to overcome siphonic action
A:-anti siphonage pipe
B:-vent pipe
C:-coupler
D:-vent cowl
Correct Answer:- Option-A
Question38:-What happens if cast iron pipes are coated with cool tar
A:-loose strength
B:-prevent corrosion
C:-dos not sag
D:-dos not fig
Correct Answer:- Option-B
Question39:-Which component in gully trap is used to prevent gases from entering waste line
A:-air seal
B:-C.I. cover
C:-water seal
D:-C.I. grating
Correct Answer:- Option-C
Question40:-Which accessories is used to change the direction flow in the pipe …..
A:-water meter
B:-pipe
C:-cocks
D:-fittings
Correct Answer:- Option-D
Question41:-The pipe fitting used to connect a service pipe to a water main is called as …..
A:-adjusting nut
B:-ferrule
C:-coupling
D:-air valve
Correct Answer:- Option-B
Question42:-In septic tank the ventilation pipe usually provided is of …..
A:-100 mm dia
B:-150 mm dia
C:-75 mm dia
D:-50 mm dia
Correct Answer:- Option-C
Question43:-Flogging is the method of generating a mist for the application of …..
A:-spray
B:-soak
C:-sanitizers
D:-filtering
Correct Answer:- Option-C
Question44:-Gate valve is one of the most common valves used in the main supply lines to the …..
A:-ventilating line
B:-water supply system
C:-back flow system
D:-drainage system
Correct Answer:- Option-B
Question45:-Air lift pump is installed to draw more water from the deep well the pump is operated by …..
A:-secondary electrical sources
B:-acute air
C:-compressed air
D:-primary electrical sources
Correct Answer:- Option-C
Question46:-White metal is an alloy of
A:-copper, lead, tin and antimony
B:-copper, zinc and tin
C:-copper, zinc, tin and Antimony
D:-copper and tin
Correct Answer:- Option-C
Question47:-Dresser coupling and Victaulic joint basically are …..
A:-back push joint
B:-chemical joint
C:-mechanical joint
D:-adhesive joint
Correct Answer:- Option-C
Question48:-Which one of the following alloys can resist salt water corrosion …..
A:-zinc alloy
B:-gun metal
C:-nickel chrome alloy
D:-brass
Correct Answer:- Option-A
Question49:-The system of water distribution which is suited to a city growing irregularly is …..
A:-grid iron system
B:-radial system
C:-ring system
D:-tree system
Correct Answer:- Option-D
Question50:-Which tool is used for heating while carrying out soldering …..
A:-torch lamp
B:-blow lamp
C:-holding lamp
D:-winding lamp
Correct Answer:- Option-B
Question51:-Rubber ring joints can be provided in the pipe line to …..
A:-water free seal
B:-water tight seal
C:-water peel seal
D:-none of the above
Correct Answer:- Option-B
Question52:-What is the use of hand taps …..
A:-internal threads
B:-external threads
C:-internal gauge
D:-internal drilling
Correct Answer:- Option-A
Question53:-In an acetylene cylinder the acetylene is dissolved in …..
A:-carbon dioxide
B:-water
C:-acetone
D:-mercury
Correct Answer:- Option-C
Question54:-Which grade G I pipe is used for water supply…..
A:-yellow
B:-blue
C:-red
D:-brown
Correct Answer:- Option-B
Question55:-The angle of metric thread is …..
A:-60 digree
B:-55 digree
C:-90 digree
D:-47 digree
Correct Answer:- Option-A
Question56:-What are the diameter of A C pipes available in …..
A:-4 cm to 100 cm
B:-5 cm to 100 cm
C:-2 cm to 100 cm
D:-6 cm to 100 cm
Correct Answer:- Option-C
Question57:-Name the tool used to check internal pipe threads …..
A:-pipe taps
B:-ring gauge
C:-pipe plug threads
D:-pipe bush
Correct Answer:- Option-C
Question58:-When pressure test can be started in solvent welder PVC pipe line
A:-after 24 hours
B:-after 12 hours
C:-after 5 hours
D:-after 36 hours
Correct Answer:- Option-A
Question59:-Where are collar joints used …..
A:-smaller diameter C I pipe
B:-small diameter A C pipe
C:-small diameter S W pipe
D:-small diameter P V C pipe
Correct Answer:- Option-B
Question60:-Which is the place preferred to fix scour valve …..
A:-lowest point in pipe line
B:-higher point in pipe line
C:-straight line in pipe line
D:-none of the above
Correct Answer:- Option-A
Question61:-Spindle of gate valve rotates without closing due to …..
A:-spindle thread badly worn-out
B:-spindle is bend
C:-gland nut loose
D:-defective packing
Correct Answer:- Option-A
Question62:-What is the size of manhole generally constructed within compound for house drainage …..
A:-90 x 70 cm
B:-90 x 80 cm
C:-90 x 60 cm
D:-90 x 90 cm
Correct Answer:- Option-B
Question63:-Name the valve is used to regulate the pressure in pipe line …..
A:-relief valve
B:-needle valve
C:-gate valve
D:-check valve
Correct Answer:- Option-A
Question64:-what is the size of frog in brick …..
A:-100 mm length x 40 mm width x 10 to 20 mm depth
B:-100 mm length x 30 mm width x 10 mm to 25 mm depth
C:-100 mm length x 50 mm width x 10 mm to 15 mm depth
D:-none of the above
Correct Answer:- Option-A
Question65:-Cross cut chisel is used for …..
A:-chipping excess metal
B:-curved grooves
C:-key ways
D:-corner
Correct Answer:- Option-C
Question66:-Which types of pipes can be cut easily by pipe cutter …..
A:-S.W. pipe
B:-C.I. Pipe
C:-A.C. Pipe
D:-G.I. Pipe
Correct Answer:- Option-D
Question67:-Name the apparatus used for testing slump …..
A:-sand cone test
B:-Mud cone test
C:-Slump cone test
D:-None of the above
Correct Answer:- Option-C
Question68:-Which method of casting C.I. pipes gives good result …..
A:-sand casting
B:-mud casting
C:-centrifugal casting
D:-none of the above
Correct Answer:- Option-C
Question69:-What is the range of S.W. pipes available in the market …..
A:-100 to 600 mm
B:-100 to 300 mm
C:-100 to 180 mm
D:-100 to 700 mm
Correct Answer:- Option-A
Question70:-Which side of mixing tap hot water line to be connected …..
A:-right side
B:-Left side
C:-Middle side
D:-Corner side
Correct Answer:- Option-B
Question71:-How to prevent algae growth in O.H. tank?
A:-copper sulphate
B:-aluminium sulphate
C:-lead powder
D:-bleaching powder
Correct Answer:- Option-A
Question72:-What is check the alignment and condition of inside the pipe …..
A:-smoke test
B:-mirror test
C:-air test
D:-hydraulic test
Correct Answer:- Option-B
Question73:-How many days curing is required for S.W. pipe joints …..
A:-7 days
B:-2 days
C:-5 days
D:-3 days
Correct Answer:- Option-A
Question74:-What is the size of flush pipe for low level flushing cistern
A:-32 mm
B:-40 mm
C:-25 mm
D:-50 mm
Correct Answer:- Option-B
Question75:-What causes the siphonic action in soil pipe …..
A:-leaked air
B:-foul air
C:-sucked air
D:-air diffuser
Correct Answer:- Option-C
Question76:-What instrument is used while conducting air test in pipe line …..
A:-manometer
B:-vinometer
C:-thermometer
D:-tint meter
Correct Answer:- Option-A
Question77:-State the size of ball used in ball test …..
A:-13 mm less than inside diameter of pipe
B:-12 mm less than inside diameter of pipe
C:-11 mm less than inside diameter of pipe
D:-10 mm less than inside diameter of pipe
Correct Answer:- Option-A
Question78:-What is the use of NAHNI trap …..
A:-to collect waste water from bath room
B:-to collect rain water
C:-to collect soil pipe from sewage
D:-to collect raw water from river
Correct Answer:- Option-A
Question79:-Why mono block pumps are more popular …..
A:-large in size
B:-small in size
C:-no valves
D:-no priming
Correct Answer:- Option-B
Question80:-How many pipes are there in a one pipe system …..
A:-one
B:-three
C:-four
D:-two
Correct Answer:- Option-D
Question81:-What are the materials required for flanged joint …..
A:-cement and hemp yarn
B:-screw and washer
C:-nut and bolt
D:-lead and tin
Correct Answer:- Option-C
Question82:-How much clearance from wall to be kept while laying G.I. pipe internally
A:-1.5 cm
B:-2.5 cm
C:-3.5 cm
D:-4.5 cm
Correct Answer:- Option-A
Question83:-What is the general fixing height of wash basin from floor level …..
A:-80 cm
B:-70 cm
C:-60 cm
D:-65 cm
Correct Answer:- Option-A
Question84:-What is height of fixing of automatic cistern for urinal …..
A:-1800 mm
B:-1900 mm
C:-1600 mm
D:-1500 mm
Correct Answer:- Option-B
Question85:-How many types of flushing cisterns are available based on operation …..
A:-5 types
B:-3 types
C:-4 types
D:-2 types
Correct Answer:- Option-D
Question86:-What is the size of waste coupling for kitchen sink
A:-32 mm
B:-50 mm
C:-38 mm
D:-40 mm
Correct Answer:- Option-B
Question87:-the brick or stone used in corner masonry of a wall is called …..
A:-king closer
B:-blank space
C:-quoin closer
D:-mortar
Correct Answer:- Option-C
Question88:-Which part ensures uniform pressure on the measuring faces in a micrometer …..
A:-ratchet stop
B:-thimble
C:-spindle
D:-barrel
Correct Answer:- Option-A
Question89:-What is plate with a short handle and is used mainly to hold mortar. What is this tool …..
A:-spade
B:-shovel
C:-hawk
D:-joint filler
Correct Answer:- Option-C
Question90:-Rust is formed from iron and which other element …..
A:-oxygen
B:-hydrogen
C:-nitrogen
D:-sulpher
Correct Answer:- Option-A
Question91:-In the context of water purification RO; stands for …..
A:-reverse osmosis
B:-relative osmosis
C:-reduced osmosis
D:-refreshed osmosis
Correct Answer:- Option-A
Question92:-The use of asbestos cement is banned in some countries because …..
A:-it cannot be repaired easily
B:-it leads to health problems
C:-it is highly corrosive
D:-it is too costly
Correct Answer:- Option-B
Question93:-Metals possess physical and mechanical properties. Which one of the following is a physical property of metals?
A:-Tenacity
B:-Malleability
C:-Fusibility
D:-Ductility
Correct Answer:- Option-C
Question94:-Which one of the following is the resistance of a metal to elastic deformation …..
A:-stiffness
B:-toughness
C:-strength
D:-ductility
Correct Answer:- Option-A
Question95:-Displacement pumps are of two types …..
A:-reciprocating and ram
B:-reciprocating and rotary
C:-reciprocating and centrifugal
D:-reciprocating and jet
Correct Answer:- Option-B
Question96:-A portion of the plumbing system that receives discharges of soil and waste stacks within the building and
conveys the same to the house sewer is …..
A:-main drain
B:-soil drain
C:-waste drain
D:-house drain
Correct Answer:- Option-D
Question97:-A plumbing fixture used for washing the middle private part of the body especially the Genitals is …..
A:-bidet
B:-ball faucet
C:-mini shower
D:-water house
Correct Answer:- Option-A
Question98:-What is boiling point of water in Fahrenheit (F) scale …..
A:-112°f
B:-212°f
C:-312°f
D:-100°f
Correct Answer:- Option-B
Question99:-Which test is applied in underground drains for soundness…..
A:-hydraulic test
B:-pneumatic test
C:-water test
D:-sound test
Correct Answer:- Option-C
Question100:-What are the two sub systems in your home plumbing …..
A:-incoming fresh water and outgoing waste water
B:-low pressure water and high pressure
C:-hot and cold water
D:-none of the above
Correct Answer:- Option-A