QUESTION PAPER – MECHANICAL DEPARTMENT GROUP “B” LDC EXAM

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QUESTION PAPER – MECHANICAL DEPARTMENT GROUP “B” LDC EXAM – 2007

April 24, 2022, 6:24 PM

EAST CENTRAL RAILWAY MECHANICAL DEPARTMENT LIMITED DEPARTMENTAL COMPETITIVE EXAMINATION (30%) FOR PROMOTION TO GROUP ‘B’ PAPER — Total Marks : 150 Total Time : 03 hours

Date : 29.09.2007

Instructions to Candidates :

a. Answer any 2 questions from section A and any 4 questions from section B

b. Maximum marks for each question are indicated in the margin.

c. Do not write your name, roll no., signature anywhere in the answer book except on Fly-slip.

d. Candidate can answer either in English or Hindi.

e. Use of mobile, calculator etc is not permitted.

f. In case of any unfair means, the candidature will be cancelled.

SECTION — A

Q1 a. A bullet is fired at an angle of 60° from horizontal with a velocity of 500 misec., find maximum height and horizontal range reached by the bullet.

b. Solve : 2X + Y + 5Z = 5

X + Y + 7Z = 0

X-Y -3Z = 2

c. Write the units of the following either in MKS or CGS or FPS systems :

i). Torque, ii). Electrical Energy, iii). Stress, iv). Strain, v). Angular velocity

Q2 a) A circular steel tank open from top has an external radius of 7 meters and its height is 10 meters. Calculate the cost of painting the exterior of the tank @ Rs. 5 per square meter.

b) There are two identical blocks A&B of the same material. Temperature of Block A is 40° F and that of Block B is 20°C. Which block is colder ?

c) Two thin wires of equal length are bent suitably to form a circle and a square. Which figure will enclose greater area ?

Q3 A domestic electric bulb has a rating of 230 volts, 100 watts

a) Find power consumed by the bulb if supply voltage drops to 180 v.

Also find resistance of the filament of the bulb.

b) What do the following stand for ?

i). CNC, CBC, iii). RAM, iv). LPG, v). PIL, vi). ROR, vii). ZRUCC, viii). PSU.

c) What factors have caused turnaround of Indian Railways ? Describe briefly.

SECTION – B

Q1 a) What are the instructions for premium train examination of air brake freight stock ? To what extent these instructions have been— implemented on E.C.Railway.

b) Briefly describe categorization of freight maintenance depots into categories like ‘A’, B’, ‘C’.

Q2 a) Briefly describe

i) Section 3 (3) of Official Language Act,

ii) Various incentive schemes to promote use of Rajbhasha.

b) What is concept of return BPC trains with regard to Primary and Secondary maintenance of coaching trains ? Enumerate advantages and drawbacks of RBPC.

Q3 a) What is the purpose of providing transition in a diesel loco and how is it achieved.

b) How the same purpose achieved in Car or Truck which does not have provision for transition.

c) What do you understand by short term rating, continuous rating and load factor in relation to diesel loco.

Q4 Write short notes on :

a) Dynamic braking,

b) ‘K’ & ‘I,’ type brake blocks,

c) fatigue

d) worn wheel profile

e) Magnaflux

Q5 a) How does scheme of disaster management function on Railways? Briefly describe some of RSRC recommendations.

b) What is bench marking. How the same is used for Man Power Planning.

Q6 a) What do you understand by ISO 9000 & ISO 14000. How does it help in improving working conditions in an organization.

b) What do you understand by CC+6+2 in relation to freight train.

Q7 a) Write short notes on any three ; i) Common welding defects, ii) High Speed Steel, iii) Annealing and Normalising, iv) Corrosion in rolling stock.

b) What is the role of PCO in a repair workshop.
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