MINING MACHINERY QUIZ (Winding) (6) (55- 66) 12 Questions....! | . MINING ENGINEERING

   MINING MACHINERY QUIZ (6) (55- 66) 10 Questions....! | .

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QUESTIONS  OF FOLLOWING (55-66) 12Q 

                             AND                           

ANSWERS  ARE BELOW THE QUESTIONS  



55)


The arc of contacting of winding rope in tower mounted friction winding

is....deg ?


1) 90 to 120

2) 120 to 150

3) 200 to 230

4) 250 to 280



56)


The arc of contacting of winding rope in friction winding is....deg ?


1) 90 to 120

2) 120 to 150

3) 185 to 230

4) 250 to 280



57)


The coefficient of friction between the sheave lining and the rope is minimum

of?


1) 0.12

2) 0.2

3) 0.4

4) 0.65



58)


The rope may slip over the wheel when the ratio T1:T2 exceeds a value?


1) 1.2 to 1.3

2) 1.4 to 1.5

3) 1.5 to 1.6

4) 1.8 to 2



59) 


In very deep mining the method of winding best suited is?


1) Drum winding

2) Koepe winding

3) Tower mounted koepe winding

4) Blair winding



60)


The method of speed control and electric winder of large capacity i.e above

800kw is?


1) sheostatic control

2) Liquid control

3) Ward leonard speed control

4) Electrical breaking



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61) 


Automaric contrivances should be provided for every shaft exceeding

minimum....m depth?


1) 50

2) 80

3) 100

4) 150



62)


When men are being hoisted orlowered as the cage appoached pit top or pit

bottom decking level its speed should not exceed 1.5 m/sec such arrangement is 

known as?


1) Over speed device

2) Overwind device

3) Ward leonard control

4) Slow banking device



63)


Mechanical breaks are applied upto depth of?


1) 100 m

2) 200 m

3) 300 m

4) 400 m



64) 


Regenerative braking is used when?


1) Hoisting loads

2) lowering loads

3) Inspection of the cage

4) None



65)


In koepe winding the overwind is prevented by?


1) Detaching hook

2) Automatic contrivances

3) Convergence of the guides

4) None



66)


In the event of power failure the brake automatically applied is?


1) Mechanical brake

2) Thrustor brake

3) Regenarative brake

4) None





ANSWERS  FOR ABOVE QUESTIONS


55)    3

56)    3

57)    2

58)     3

59)    4

60)    3

61)    3

62)    4 

63)    2

64)    2


65)     3

66)      2

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MINING MACHINERY QUIZ (5) WINDING (44- 54) 10 Questions....! | . MINING ENGINEERING

  MINING MACHINERY QUIZ (5) (44- 54) 10 Questions....! | .

MINING ENGINEERING 









MINING ENGINEERING 


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QUESTIONS  OF FOLLOWING (44-54) 10Q 

                             AND                           

ANSWERS  ARE BELOW THE QUESTIONS  



44)

In case of koepe winding the decking difficulties while loading and unloading the cage are overcome by the use of?


1) Safety catches

2) bell plates

3) Keps

4) Hinged platform




45) 

The weight of the steel guides is........kgf/m?


1) 5 to 10

2) 10 to 20

3) 20 to 55

4) 60 to 90



46) 

The minimum space between two cages is generally?


1) 20 cm

2) 30 cm

3) 40 cm

4) 50 cm



47)

The tensioning arrangement weights are about ....KN per 100 m depth of shallow mines and ...KN per 100 m depth for deep mines?


1) 10 ; 5

2) 5 ;10

3) 10 ; 20

4) 20 ; 10



48)

The life of the guide ropes is?


1)10 year

2) 20 years

3) 5 years

4) 3.5 years




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49)

The factor of safety for the drum winding is?


1) 6

2) 7

3) 9

4) 10



50) 

The factor of safety for the friction winding is?


1) 6.5 to 8

2) 9

3) 10

4) 12




51) 

While recapping atleast .........m long rope should be cut near the rope cappel?


1) 1 m

2) 2 m

3) 3 m

4) 4.5 m



52)

The maximum life of the winding rope is?


1) 10 years

2) 7 years

3) 5 years

4) 3.5 years



53)

The torques on the winding drum due to loaded cage and due to empty may be balanced as far as practicable by?


1) Use of balancing rope

2) Use of suitable shape of pulley

3) Changing the load on the two cages

4) Controlling the speed



54) 

The method of nearly balancing the torques on the winding engine in deep shaft winding by the use of?


1) Balancing rope

2) Bi cycloconical drum

3) Conical drum

4) Large cylindrical drum



ANSWERS  FOR ABOVE QUESTIONS


44)   4

45)    3

46)    3

47)     1

48)    1

49)    4

50)    1

51)    2 

52)    4

53)    1


54)    2

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MINING MACHINERY QUIZ WINDING (4) (33- 43) 10 Questions....! | . MINING ENGINEERING

  MINING MACHINERY QUIZ (4) (33- 43) 10 Questions....! | .

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MINING ENGINEERING 


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QUESTIONS  OF FOLLOWING (33-43) 10Q 

                             AND                           

ANSWERS  ARE BELOW THE QUESTIONS  



33)


The angle of fleet should not exceed?


a) 1 deg

b) 1.5 deg

c) 3 deg

d) 5 deg


34)


The pay load carried by skip is?


a) 6 te

b) 8 te

c) 10 te

d) 12 te


 35)


The ratio of pay load to gross load for skip winding is.......and for cage winding is...?


a) 0.6 ; 0.35

b) 0.35 ; 0.6

c) 0.8 ; 0.6

d) 0.6 ; 0.8,



 36)


The groove of the head gear pulley should be ...........of the circumference of the rope is in contact with the groove?


a) 1/4

b) 1/2

c) 1/3

d) 3/4



37) 


The number of spokes in head gear pulley are?


a) 15

b) 19

c) 21

d) 25


38)


The cage chains should be annealed at least once in?


a) 3 months

b) 6 months

c) 9 months

d) 12 months




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39)


The components of cage arrangements chains; links; shackles; are exempted from periodical heat treatment if they are made of?


a) wrought iron

b) Mild steel

c) 0.5 % carbon steel

d) 1.5 % Manganese steel


 40)


The most important role plays in a safety that a component detaching hook is?


a) Jaws

b) Center pivot

c) Copper pin

d) D link pin


 41)


All the suspension gear should be renewed after every ............?


a) 5 years

b) 7 years

c) 10 years

d) 15 years


42)


The levels in safety catches spaced at intervals varying from?


a) 0.1 to 0.3 m

b) 0.3 to 1 m

c) 1 to 1.3 m

d) 1.3 to 2 m


43)


Retractable supports for cages used while loading and unloading being carried at the top of the shaft are?


a) Safety catches

b) bell plates

c) keeps

d) platform




ANSWERS  FOR ABOVE QUESTIONS


33)    B

34)    B

35)    A

36)     C

37)    C

38)    B

39)    D

40)    C 

41)    C

42)    B


43)     C

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Gujarat Mineral Research & Industrial Consultancy Society (20) Vacancy

 

Gujarat Mineral Research & Industrial Consultancy Society  (20)  Vacancy 






MINE OVERMAN
NO OF POSTS : 20

 Qualification : MINE OVERMAN/FOREMAN
OVERMAN or SECOND CLASS CERTIFICATE
 Experience : NOT NECESSARY
 Age : 45
 Job Location : MINE ACROSS GUJRAT,Gujarat
 Application Fees : NIL
 Job Type : Contractual
 Important Dates :
LAST DATE TO APPLY OFFLINE 
- 10th SEPTEMBER
SEE PDF BELOW 

MINING ENGINEERING 


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Mining is like a search-and-destroy mission.

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MINING ENGINEERING 

Gujarat Mineral Research & Industrial Consultancy Society (50) Vacancy

 

Gujarat Mineral Research & Industrial Consultancy Society  (50)  Vacancy 





MINE OVERMAN
NO OF POSTS : 50

 Qualification : MINE OVERMAN/FOREMAN
OVERMAN or SECOND CLASS CERTIFICATE
 Experience : NOT NECESSARY
 Age : 45
 Job Location : MINE ACROSS GUJRAT,Gujarat
 Application Fees : NIL
 Job Type : Contractual
 Important Dates :
LAST DATE TO APPLY OFFLINE 
- 10th SEPTEMBER
SEE PDF BELOW 

MINING ENGINEERING 


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MINING ENGINEERING 




MINING MACHINERY QUIZ (3) (23- 32) 10 Questions....! | MINING ENGINEERING

 MINING MACHINERY QUIZ (3) (23- 32) 10 Questions....! | .

MINING ENGINEERING 






MINING ENGINEERING 


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Mining is like a search-and-destroy mission.

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QUESTIONS  OF FOLLOWING (23-32) 10Q 

                             AND                           

ANSWERS  ARE BELOW THE QUESTIONS  



 23.)

 The vertical flexibility of armored chain conveyor is?


a) 3 to 4 deg

b) 2 to 3 deg

c) 1 to 2 deg

d) 4 to 5 deg



24.)

 The loading capacity of gate end loaders is?


a) 1 to 1.5 tph 

b) 2 to 4 tph

c) 5 to 7 tph 

d) 7 to 9 tph


25.)

 To slow down the tubs the device used is?


a) Runaway switch

b) Back stay

c) Hydraulic tub retarder

d) Sprags


26.)

 Snub pulleys are placed near the drive head?


a) to increase the arc of contact

b) to increase tension on the belt

c) to accommodate more belt for extension 

d) for safety


27.)

 The haulage used upto 35 hp is called ?


a) Rope haulage

b) Endless haulage

c) Tugger haulage

d) Gravity haulage



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28.)

 Where the series of belt conveyors are used for transport of coal there shall be?


a) remote control

b) sequence control

c) single point control

d) multi point control


29.)

 The device used to hold the belt to run downward when the power is cutoff is?


a) Sequence control 

b) back stay 

c) remote control 

d) holdback


30.)

 Usually one motor drives a belt for a roadway of upto?


a) 100 m

b) 150 m 

c) 200 m

d) 250 m


31.)

 The speed of single chain conveyor is ?


a) 10 m/min

b) 35 m/min

c) 45 m/min

d) 60 m/min


32).

 Limiting length of scraper chain conveyor is?


a) 100 m

b) 80 m

c) 60 m

d) 40 m



ANSWERS  FOR ABOVE QUESTIONS


23)    A

24)    A

25)    D

26)     A

27)    C

28)    B

29)    D

30)    C 

31)    B

32)    A



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MINING MACHINERY QUIZ 1 ( 12- 22) Questions....! | MINING ENGINEERING

 MINING MACHINERY QUIZ 2 ( 12- 22) Questions....! | 

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                   QUESTIONS BELOW  FOLLOWING                       

                                                       AND                                              

                    ANSWERS  ARE BELOW QUESTIONS                   



 12) 

Mechanical breaks are applied upto depth of?


1)  100 m

2)  200 m

3)  300 m

4)  400 m 


13)

Regenarative braking is used when?


1)  Hoising loads

2)  lowering loads

3)  Inspection of the cage

4)  None 


14)

In koepe winding the overwind is prevented by?


1)  Detaching hook

2)  Automatic contrivances

3)  Convergence of the guides

4)  None 


15)
In the event of power failure the brake automatically applied is?


1)  Mechanical brake

2)Thrustor brake

3)  Regenerative brake

4)  None


16)

The portion of the rope suffers from most severe shocks is?


1)  Near the capel

2)  Near the drum

3)  The part of the rope that rests on the drum

4)  Part of the rope rests on headgear pulley


17)

The raising capacity of amine depends on the shaft capacity which in turn depends on?


1)  Speed of winding

2)  Pit top and pit bottom arrangement

3)  Rolling stock

4)  Dispatch system


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18)

The pit top and pit bottom arrangement which deals with reasonable output per month and occupies less space is?


1)  Run round arrangement

2)  Back shunt circuit

3)  Turn table circuit

4)  Traverse circuit 


19)

The out put per month for the turn table circuit is?


1)  50000

2)  40000

3)  30000

4)  20000 


20)

The out put per month for the Backshunt circuit is?


1)  50000

2)  40000

3)  30000

4)  20000 


21)

The simplest system of haulage system for raising the loads?


1)  Direct rope haulage

2)  Endless rope haulage

3)  Main tail rope haulage

4)  Gravity 


22)

The gradient suitable for direct rope haulage is steeper than?


1)  1 in 15

2)  1 in 3

3)  1 in 10

4)  1 in 30 


ANSWERS 


12)    2

13)    2

14)    3

15)    2 

16)    1

17)    2 

18)    3

19)    3 

20)    1

21)    1

22)    3


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MINING MACHINERY QUIZ HAULAGE (7) (67- 80) 14 Questions....! | . MINING ENGINEERING

  MINING MACHINERY QUIZ (7) (67- 80) 14 Questions....! | . MINING ENGINEERING  MINE HAULAGE...........?...................?....! MINING ENGI...