RRB Junior Engineer JE Mechanical Previous Question Papers | Indian Shout

You are here: » RRB Junior Engineer JE Mechanical Previous Question Papers

RRB Junior Engineer JE Mechanical Previous Question Papers


 RRB JE MECHANICAL ENGINEER TECHNICAL QUESTIONS

A.. A single acting reciprocating pump, running at 60 r.p.m, delivers 0.01 m2/sec of water. The area of the piston is 0.05m2 and stroke length is 40 cm. Then theoretical discharge of the pump will be
(a) 0.015 m3/sec
(b) 0.02 m3/sec
(c) 0.025 m3/sec
(d) 0.03 m3/sec
Ans:- B 
 
In question (A), the co-efficient of discharge would be
(a) 0.9
(b) 0.8
(c) 0.6
(d) 0.5
Ans:- D
 
In question (A), the slip of the pump would be
(a) 0.02 m3/sec
(b) 0.01 m3/sec
(c) 0.005 m3/sec
(d) 0.003 m3/sec
Ans:- B

 

Work done in a free expansion process is
a.0
b.minimum
c.maximum
d. positive

In a reciprocating engine
a. crankshaft and flywheel form 2 kinematic links
b. crankshaft and flywheel form 1 kinematics links
c. crankshaft and flywheel do not form kinematic links
d. flywheel and crankshaft separately form kinematic links

A kinematic chain is known as a mechanism when
a.none of the link is fixed
b.one of the links is fixed
c. two of the links are fixed
d.all of the links are fixed

The impact strength of an material is an index of its
a. Toughness
b. Tensile strength
c. Capability of being cold worked
d. Hardness
e. Fatigue strength
Ans :: a
 
A feeler gauge is used to check
a. Radius
b. Screw pitch
c. Surface roughness
d. Unsymmetrical shape
e. Thickness of clearance
Ans :: e
 
The possibility of negative slip in reciprocating pump is when
(a) delivery pipe is short
(b) suction pipe is long
(c) pump is running at high speed
(d) all of the above
Ans:- D
 
The slip in the reciprocating pump will be negative if
(a) Qth > Qact
(b) Qth < Qact
(c) Qth = Qact
(d) none of the above
Ans:- B
 
Thermal efficiency of a closed cycle gas turbine plant increases by
a.reheating
b.intercooling
c.regenerator
d. all of the above
 
 The power required to drive a single acting reciprocating pump is equal to
(a) w.A.L.N / 4500
(b) w.A.L.N.(hs + hd)4500
(c) A.L.N. (hs + hd)/4500
(d) w.L.N/4500 where w = specific weight of water

Ans:- B

 The rate of flow of water through a double acting reciprocating pump is equal to
(a) A.L.N /60
(b) 2 AL.N/60
(c) A.L.N./2×60
(d) 3 A.L.N./60
Ans:- B

 

The rate of flow of water through a single acting reciprocating pump is equal to
(a) A.L.N /60
(b) 2 AL.N/60
(c) A.L.N./2×60
(d) 3 A.L.N./60
Ans:- A
 
Petrol commercially available in India for Indian passenger cars has octane
number in the range
A 40 to 50
B 60 to 70
C 80 to 85
D 95 to 100The knocking tendency in C.I engines increases with
A decrease of compression ratio

B increase of compression ratio
C increasing the temperature of inlet air
D increasing cooling water temperature
 
 The pump, which works on the principle of water hammer, is known as
(a) centrifugal pump
(b) reciprocating pump
(c) hydraulic ram
(d) none of the above
Ans:- C

 

The pump which raises water without any external power for its operation, is known as
(a) centrifugal pump
(b) reciprocating pump
(c) hydraulic ram
(d) hydraulic intensifier
Ans:- C
 
The power at the shaft of a centrifugal pump is 100 KW, and the power available at the impeller is 900 KW. If water horse power is 720 KW, then overall efficiency of the centrifugal pump will be
(a) 90% (b) 80% (c) 75% (d) 72%
Ans:- D

 

Metal in machining operation is removed by
a. Tearing chips
b. Distortion of metal
c. Shearing the metal across a zone
d. Cutting the metal across a zone
e. Pushing the metal with tool
Ans :: c

 

Which one of the following methods produces gear by generating process
a. Hobbing
b. Casting
c. Punching
d. Milling
e. Broaching
Ans :: a
 
The term W.Q.Hm / (75 S.H.P) for a centrifugal pump is known as
(a) mechanical efficiency (b) manometric efficiency (c) overall efficiency (d) none of the above
Ans:- C
 
If a circular chamber is introduced between the casing and the impeller, then casing is known as
(a) vortex casing (b) volute casing (c) casing with guide blades (d) none of the above
Ans:- A
 
The rotating part of a turbine is known as
(a) Impeller (b) Guide mechanism (c) Runner (d) None of the above
Ans:- A
 
 In case of Kaplan turbine, velocity of flow at inlet is
(a) less than that at outlet           (b) more than that at outlet
(c) equal of that at outlet            (d) none of the above
Ans:- C

 

The main advantage of the draft-tube is to convert
(a) pressure energy into kinetic energy
(b) kinetic energy into pressure energy
(c) pressure energy into electrical energy
(d) none of the above
Ans:- B
 
The pressure at the exist of the runner of a reaction turbine is generally
(a) more than atmospheric pressure
(b) equal to atmospheric pressure
(c) less than atmospheric pressure
(d) none of the above
Ans:- C

Similar Posts:

 
 
Posted by 265 Responses

Categories:Exam Previous Question Papers;Tags: , , ,

Free Email Newsletter

Stay Updates with this Blog. Get Free email newsletter updates..

And then confirm your email subcription

   

265 Comments to “RRB Junior Engineer JE Mechanical Previous Question Papers”

  1. santhosh says:

    Sir i want last year model question paper to send my mail address kkssr43@gmail.com

  2. arijit Bhowmick says:

    Sir please send me previous 5 years solved question paper of rrb je in my mail id..thank you

  3. deepika says:

    plz sir rrb je mechanical last year paprer send me plz

  4. deepika says:

    plese sar send me last year je mechanical paper plz

  5. Subash says:

    Sir pls send the Last 5 Year question papers for JE& SE

  6. chintan chavda says:

    if any one have previous years mechanical paper then plz send me

  7. M.NETHAJI says:

    Dear sir please send me last 10 year question pappers of rrb je&se mechanical enjineering

  8. arun says:

    Hey Guys I am writing je mechanical rrb exam does any one have previous year question paper pls Mail me at arunchandran_n@YAHOO.COM

  9. shunmugakumar says:

    sir please send me the last
    5years je question paper with answers for my e mail.

  10. Bharat Barke says:

    Sir please rrb junior mechanical engg .exam 5 question paper previous year sent pleaae

  11. Bharat Barke says:

    Sir please rrb junior engg.exam 5 question paper previous year sen lease

  12. sir please send me previous 5 year qus. paper of rrb JE&SE mechnical engg,

  13. gopigudipati says:

    sir,please send me last 5 years question papers of RRB JE Mechanical Engineer.

  14. Amit Kumar Bade says:

    Please send me some previous question papers of RRB JE & SE Mechanical Engg.

  15. sanjeev says:

    Dear sir g please send me last 5 year questions paper of rrb je mechanical engineer

Leave your comment here: