QUESTION BANK FOR SELECTION TO GROUP "B"

MECHANICAL DEPARTMENT - PART II

 

(CARRIAGE AND WAGON)  

Q-1. What are the essential requirements for running trains at 120 kmph/130 kmph?

i. All coaches should be ICF all coil type.

ii. All coaches should be fitted with 16 T bogie.

iii. All coaches should be maintained as per technical pamphlet C-7807.

 

a. i & ii

b. ii & iii

c. i & iii

d. All of the above.

 

Q-2. As per Board's guidelines, how much maintenance time should be given to a 24 coach length trains during primary maintenance?

a. 4hrs.

b. 6 hrs.

c. Between 4 to 6 hrs.

d. Time depending upon the availability of washing line slot & lie over of the train.

 

Q-3. What is not the reason for very slow charging of Brake pipe pressure?

a. Insufficient supply of air through compressor/loco.

b. Leakage in distributor valve.

c. Leakage in BP line for complete train less than 0.2 kg/cm2/min.

d. None of the above.

 

Q-4 ……… test is done by checking that the brakes do not apply by reducing the pressure at the rate of 0.3 kg/cm2 in 60 sec.

a. Release

b. application

c. Sensitivity

d. Insensitivity

 

Q-5. If the coach No. is NR 99104. What type of coach is this?

a. ACCW

b. ACCN

c. FACCW

d. SCZAC

 

Q-6 What is the ride index of a LHB Coach?

a. 3.25 - 3.50

b. 2.75 - 3.00

c. 2.50 - 2.75

d. More than 3.50

 

Q-7. As per watering committee recommendations for enroute watering in coaches, the rate of flow at the delivery end of a hydrant should not be less than….. Itrs./min.

a. 100

b. 75

c. 125 

d. 150

 

Q-8. What is/are the advantage(s) of Bogie Mounted Brake System over conventional air brake system?

a. Reduction of weight

b. Reduction of braking distance.

c. Less wear and tear of wheel sets

d. All of the above.

 

Q-9.  Which type of brake blocks are used in Bogie Mounted Brake System?

a. High friction composite 'K' type brake block.

b. High friction composite 'L' type brake block.

c. Sand casting brake block.

d. High friction composite 'M' type brake block.

 

Q-10.  Passenger carrying capacity of a LHB Chair Car is?

a. 67

b. 71

c. 72

d. 78

 

Q-11. When box wagon was introduced on the Indian Railways?

Ans. 1960

 

Q-12. 1st Shatabdi train was started between?

Ans. NDLS - JHS

 

Q-13. What is the axle load of a box wagon?

Ans. 20.3 T

 

Q-14.  How may brake blocks are fitted in one trolley of Box wagons?

Ans. 8

 

Q-15.  How much inclination has been given on wheel flange?

Ans. 1 in 2.5

 

Q-16.  What is the hole dia of Standard Test Plate?

Ans. 7.5 mm

 

Q-17.  Yellow strips on end wall panels of coaches, what represents?

Ans. Anti telescopic coach body

 

Q-18.  White dumble mark on end wall panels of coaches, what represents?

Ans. Coach fitted with enhanced capacity screw coupling.

 

Q-19. Yellow strips on exterior panel above the Lav. Window on coaches, what represents?

Ans. Second class general coach.

 

Q-20. What is the average life of light utilization categories of coaches?

Ans. 40 Years

 

Q-21. At what time interval the POH attention to the non-AC coaches earning less than 2.0 Lakh kms. per annum will be given?

Ans. 12 Months

 

Q-22. What is the periodicity of POH for newly built BOXN wagons?

Ans. 6 Years

 

Q-23. What Variation on the wheel dia on 4-wheeler IRS wagon is permissible?

Ans. 25 mm

 

Q-24. What level of dash pot oil is being maintained on the coaches at W/line?

Ans. 60 mm

 

Q-25. What is the condemning limit of side bearer bronze wearing piece for Shatabdi coaches?

Ans. 43.5mm

 

Q-26. Thickness of flange measured below which height from the top of the flango?

Ans. 14mm

 

Q-27. What is the working capacity of enhanced capacity screw coupling?

Ans. 36.0 Tonnes

 

Q-28. What is WGPFAC?

Ans. Self generation partial 1st AC & first class coach code.

 

Q-29. What is the brake cylinder dia of air brake system?

Ans. 355 mm

 

Q-30. During testing, what is the permissible leakage in FP & BP?

Ans. 0.2 Kg/cm2 per minutes.

 

Q-31. What is the train pipe dia/size of air brake goods stock?

Ans. 32 mm

 

Q-32. Total number of plates in laminated springs of BOX wagon is ?

Ans. 10

 

Q-33. Sharp flange will occur when the top radius at the corner towards tread reduces to ?

Ans. 5 mm

 

Q-34.  DV of goods stock can be provided on coaching stock?

Ans. False

 

Q-35.  Breaking strength of screw coupling of ICF/BG coaches is 71.12T?

Ans. True

 

Q-36.  Sodium base grease is recommended for roller bearings?

Ans. False

 

Q-37.  Intermediate piece is used at which location in air brake system?

Ans. Between DV & common pipe bracket.

 

Q-38. What is the reason for FP pressure rushing to BP pipeline?

Ans. DV defective

 

Q-39. How much fading of brake power is permissible in air brake train from originating station to destination?

Ans. Nil.

 

Q-40. How many shock absorbers are fitted in IRY coach?

Ans. 20 (Primary vertical -8, Secondary vertical -4, Secondary lateral - 4, Yaw Damper - 4)

 

Q-41. Which valve control skidding of IRY coach?

Ans. Dump valve

 

Q-42. In which trolley side frame key is used?

Ans. Casnub trolley

 

Q-43. Which type of roller bearing is used in BOXN wagon?

Ans. Cartridge Roller Bearing

 

Q-44. How many rubber pads are used in one buffer of ICF coach?

Ans. 15

 

Q-45. What happen if BP pressure rushes to FP pipeline?

Ans. NRV defective

 

Q-46. Why is free lift given in vacuum cylinders?

Ans. To enable the rolling ring to come out of piston, grooves

 

Q-47. In which trolley wedge block is used?

Ans. Casnub

 

Q-48. What is the position of isolating cock when its handle is in vertical position?

Ans. Open position

 

Q-48(a). Where is 'U' controller fitted?

Ans. In DV

 

Q-49. What is ultrasonic test?

Ans. lt is a non destructive test which gives information about internal flaws in metal.

 

Q-50. What type of roller bearing is used in box wagon?

Ans. Cylindrical roller bearing

 

Q-51. Which type of hand brake is used in power cars of IRY coaches?

Ans. Manual parking brake

 

Q-52. What is the minimum buffer height of loaded ICF coach?

Ans. 1030 mm

 

Q-53. What is the free height of dashpot spring of Rajdhani power car?

Ans. 372 mm

 

Q-54. When a wheel flange is declared deep?

Ans. On 35 mm

 

Q-55. What is the maximum limit of flat place in ICF coach?

Ans. 50 mm

 

Q-56. What is the full form of YS?

Ans. Suburban second class

 

Q-57. What is the maximum wear limit between brake gear pin & bushes?

Ans. 1.5 mm

 

Q-58. What is the full form of RT?

Ans. Tool Van

 

Q-59. How much pressure should be dropped for brake application of an air brake train?

Ans. 1.3-1.6 Kg/sQ- cm

 

Q-60. What is the condemning limit of ICF tyred wheel?

Ans. 851 mm

 

Q-61. What is height of ICF coach from rail level?

Ans. 4025 mm

 

Q-62. What is the flange thickness of ICF wheel?

Ans. 28.5 mm

 

Q-63. What the condemning limit of flange thickness in case of high-speed coach?

Ans. 22mm

 

Q-64. What is the standard play between rail and wheel flange?

Ans. 19mm

 

Q-65. What is a specific name of CRT coupler?

Ans. Alliance II coupler

 

Q-66. What is the thickness of brake pad used in IRY coaches?

Ans. 35 mm /24 mm

 

Q-67. Low platform container flats having the provision of automatic load sensing device which gives indication regarding over loading?

Ans. True

 

Q-68. Variation in wheel dia on the same axle in service will only cause biased wear on the wheels, reducing wheel life but will not effect safety is any way?

Ans. True

 

Q-69. Full name of PEASD?

Ans. Passenger Emergency Alarm Signal Device.

 

Q-70. What are the choke sizes of ACP and Guard emergency valve?

Ans. 4 mm & 5 mm respectively

 

Q-71. How will you identify mixed brake blocks of K-type & L-type ?

Ans. K-type brake blocks having projected lug 21 mm below the both ends but the L-type brake blocks having projected portion at the both extreme ends.

 

Q-72. What is the filling up time for brake cylinder from 0 to 3.6 kg/cm2 pressure on full service application in a coaching stock?

Ans. 3 - 5 seconds

 

Q-73. What type of Air brake system should be fitted on the coaches, allow to run on 24 coach trains?

Ans. Twin pipe graduated release system

 

Q-74. How much gap should be maintained in between toothed wheel and pulse generator?

Ans. 0.4 to 1.4 mm

 

Q-75. What is the condemning dia of IRY wheel set?

Ans. 814 mm

 

Q-76. How much force is required to operate automatic twist lock for lifting the container from the wagon?

Ans. 1000 Kg

 

Q-77. Which class of ODC is permitted for journey during day only?

Ans. Class 'C'

 

Q-78. What is the validity for the brake power certificate of a close circuit rake?

Ans. 4500 km

 

Q-79. What is the purpose to provide elastomeric pads?

Ans. To reduce wheel flange wear.

 

Q-80. What is the operational speed of BLC wagons rake?

Ans. 100 kmph

 

Q-81. One modular unit of BLC rake comprises how much CAR 'B' wagons?

Ans. 3

 

Q-82. During blockage test, if there is a blockage in a engine system at which amount of vacuum the loco will be declared failed?

Ans. More than 8 cm

 

Q-83. What does AB represents which is marked near to coach number on exterior panel of coach?

Ans. Coach fitted with bogie mounted air brake cylinders

 

Q-84. Pin for lever hanger in BMBC is similar to the pin for lever hanger in conventional air brake stock. Is it true or false?

Ans. False

 

Q-85. What does G represents in coach code WGACCN ?

Ans. Self Generation Coach

 

Q-86. "There shall be no gap between the buffers of adjoining coaches after tightening of screw coupling", is one of the technical requirement for running 24 coach train. Is it true or false?

Ans. True

 

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Brought out By: Indian Railways Technical Supervisors Association

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