😎🎯आपकी 7अक्टूबर2021 की आईटीआई theory बैक पेपर की एग्जाम की ANSWER - KEY यहाँ दिखाई गयी हैं
OR DONLOAD PAPER 2021
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Theory BACK PAPER 4TH SEM. 7oct.2012 exam
1.C
2.A
3C
4D
5.A
6.B
7.A
8.C
9.B
11C
12D
13D
16.A
17.A
18.A
19C.
22C
49. which is proportional to the torque in dc motor
Ans. armature current
42 what is the purpose of jog key in control panel of d.c drive
Ans. Inching Operation
41.which type of sensing unit employed in drive system
Ans.speed sensing
40. which power modulator used in the electric drive system
Ans. Cyclo converters
39. which is the classification of drive according to dynamics and transients
Ans variable position control drive
39. What is the electric drive
34. which type of line insulator is.
1 Which cable ties are used to bunch the
wires?
C Nylon ties
2 What is the name of the wiring accessory
used in control panel wiring?
5 Which switch with an actuator is operated by the motion of a machine or part of an object?
A Limit switch
6 Which switch is operated at OFF load
conditional
B Isolating switch
7 Which accessory is used to mount MCB, OLR
in the panel board without using screws?
A DIN Rail
8 Which type of device protects motors from over heating and over loading in a panel board?
C Thermal relay
9 Which is the correct sequence operation of contactors for operating automatic star delta starter?
B Star Main Timer Delta
10 Why control panels are provided with control transformer?
A To maintain rated voltage to load B To operate the auxiliary circuits
с To maintain rated main supply voltage
D To supply reduced voltage to power circuit
A DIN rails
B G channel
C Grommets
D Race ways
3 What is the name of the accessory used in
control panel wiring?
A Lugs
B Thimble
C Grommet
D Terminal connector
4 Which device protects from overload and
short circuit in a panel board?
A Isolating switch B Time delay relay
C Thermal overload relay D Miniature circuit breaker
11 What is the use of PVC channel in a control panel wiring?
C Path way for electrical wiring and protection
19 Which turbine is used for high heads in hydro electric power plant?
Pelton turbine
12 What is the purpose of DIN-rail used in control panel wiring?
D Reaction turbine
20 What is the function of penstocks in hydro power stations?
B Carries water to turbines
21 Which is the purpose of boiler in a steam
D Discharges surplus water from reservoir
power station?
A Super heats the steam
B Heats feed water and air
C Converts water into steam D Liberates the heat from burnt fuel
22 Which material is used as control rod in al
nuclear reactor?
A Thorium
B Graphite
screws 13 Which device controls the operations in sequential control systems?
A Timer
B Relays
C Contactor
D Control transformer
14 What is the purpose of control transformer used in control panel wiring?
A To maintain constant terminal voltage B To supply the power to the auxiliary circuits D Tungsten
C Cadmium
23 Which is the residue of bio-mass?
A Slurry
с To control the supply voltage to the contactor D To protect the control elements from over
voltage fault 15 Which is the conventional power generation? C
B Bio fuel
Manure
D Bio gas
24 Which is the main constituent of biogas?
A Oxygen
B Methane
C Hydrogen D Carbon dioxide
25 How electricity produced in solar panel? A While sunlight strikes glass
B While sunlight strikes nickel plate
C While sunlight strikes manganese
D While sunlight strikes on photovoltaic cell
26 What is the function of economiser power plant?
A Converts water into steam
B Heats the air by the flue gases
C Heats the feed water by the flue gases D Purifies the feed water by chemical treatment
in steam
A Wind power generation
B Tidal power generation C Solar power generation
D Thermal power generation
16 Which material is used in solar cell?
A Silicon
B Copper
C Antimony
D Phosphorus
17 Which is the non conventional energy source?
A Wind
18 Which is the natural source of energy?
A Sun
Total time: 2 hrs Total Marks: 150
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