#2
| |||
| |||
Re: SSC Junior Engineering Mechanical Department Paper
Here I am giving you question paper for SSC Junior Engineering Mechanical Department. 1 In PERT analysis a critical activity has A) maximum Float B) zero Float C) maximum Cost D) minimum Cost Answer : (B) 2 Environment friendly refrigerant R134a is used in the new generation domestic refrigerators. Its chemical formula is A) CH C1 F2 B) C2 C13 F3 C) C2 C12 F4 D) C2 H2 F4 Answer : (D) 3 A solid cylinder (surface 2) is located at the centre of a hollow sphere (surface 1). The diameter of the sphere is 1m, while the cylinder has a diameter and length of 0.5 m each. The radiation configuration factor F11 is A) 0.375 B) 0.625 C) 0.75 D) 1 Answer : (C) 4 For a fluid flow through a divergent pipe of length L having inlet and outlet radii of R1 and R2 respectively and a constant flow rate of Q, assuming the velocity to be axial and uniform at any cross-section, the acceleration at the exit is A) 2Q(R1 - R2) p LR23 B) 2Q2 (R1 - R2) p LR23 C) 2Q2 (R1 - R2) p2LR25 D) 2Q2 (R2 - R1) p2LR25 Answer : (C) 5 An incompressible fluid (kinematic viscosity, 7.4 x 10-7 m2/s, specific gravity, 0.88) is held between two parallel plates. If the top plate is moved with a velocity of 0.5 m/s while the bottom one is held stationary, the fluid attains a linear velocity profile in the gap of 0.5 mm between these plates; the shear stress in Pascals on the surface of top plate is A) 0.651 x 10-3 B) 0.651 C) 6.51 D) 0.651 x 103 Answer : (B) * * * 6 The tool of an NC machine has to move along a circular arc from (5,5) to (10,10) while performing an operation. The centre of the arc is at (10,5). Which one of the following NC tool path commands performs the above mentioned operation? A) N010 G02 X10 Y10 X5 Y5 R5 B) N010 G03 X10 Y10 X5 Y5 R5 C) N010 G01 X5 Y5 X10 Y10 R5 D) N010 G02 X5 Y5 X10 Y10 R5 Answer : (D) 7 During a Morse test on a 4 cylinder engine, the following measurements of brake power were taken at constant speed. All cylinders firing 3037 kW Number 1 cylinder not firing 2102 kW Number 2 cylinder not firing 2102 kW Number 3 cylinder not firing 2100 kW Number 4 cylinder not firing 2098 kW The mechanical efficiency of the engine is A) 91.53% B) 85.07% C) 81.07% D) 61.22% Answer : (C) 8 In terms of theoretical stress concentration factor (Kt) and fatigue stress concentration factor (Kf ), the notch sensitivity ‘q’ is expressed as A) (Kf -1) (Kt -1) B) (Kf -1) (Kt +1) C) (Kt -1) (Kf -1) D) (Kf +1) (Kt +1) Answer : (A) 9 Starting from x0 = 1, one step of Newton-Raphson method in solving the equation x3 + 3x -7 = 0 gives the next value (x1) as A) x1 = 0.5 B) x1= 1.406 C) x1= 1.5 D) x1 = 2 Answer : (C) 10 A maintenance service facility has Poisson arrival rates, negative exponential service time and operates on a ‘first come first served’ queue discipline. Break downs occur on an average of 3 per day with a range of zero to eight. The maintenance crew can service an average of 6 machines per day with a range of zero to seven. The mean waiting time for an item to be serviced would be A) 16 day B) 13 day * * * C) 1 day D) 3 days Answer : (A) 11 The S-N curve for steel becomes asymptotic nearly at A) 103 cycles B) 104 cycles C) 106 cycles D) 109 cycles Answer : (C) 12 In a rolling process, sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 600 mm and it rotates at 100 rpm. The roll strip contact length will be A) 5 mm B) 39 mm C) 78mm D) 120mm Answer : (A) 13 Water at 42°C is sprayed into a stream of air at atmospheric pressure, dry bulb temperature of 40°C and a wet bulb temperature of 20°C. The air leaving the spray humidifier is not saturated. Which of the following statements is true? A) Air gets cooled and humidified B) Air gets heated and humidified C) Air gets heated and dehumidified D) Air gets cooled and dehumidified Answer : (B) 14 The angle between two unit-magnitude coplanar vectors P(0.866, 0.500,0) and Q(0.259, 0.966,0) will be A) 0° B) -30° C) 45° D) 60° Answer : (C) 15 A lot has 10% defective items. Ten items are chosen randomly from this lot. The probability that exactly 2 of the chosen items are defective is A) 0.0036 B) 0.1937 C) 0.2234 D) 0.3874 Answer : (B) |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
SSC Junior Engineer Civil Solved Paper | Unregistered | Main Forum | 2 | 2nd April 2018 11:23 AM |
OPSC Junior Assistant Question Paper | Unregistered | Main Forum | 1 | 29th August 2017 01:03 PM |
Department of Mechanical Engineering IIT Bombay | Unregistered | Main Forum | 1 | 13th May 2017 04:12 PM |
IISC Bangalore Department Of Mechanical Engineering | Unregistered | Main Forum | 1 | 28th November 2016 03:22 PM |
SVNIT Mechanical Department | Unregistered | Main Forum | 1 | 5th November 2016 01:27 PM |
Combined Engineering Services Examination Model Question Paper For Mechanical | Unregistered | Main Forum | 1 | 18th October 2016 09:05 AM |
SSC Junior Translator Paper | Unregistered | Main Forum | 1 | 29th September 2016 09:53 AM |
IAS Exam Mechanical Engineering Question Paper | Unregistered | Main Forum | 0 | 18th July 2015 04:19 PM |
Department of mechanical engineering IIT madras | Unregistered | Main Forum | 0 | 18th July 2015 09:59 AM |
Department of Mechanical and Industrial Engineering Indian Institute of Technology Ro | Unregistered | Main Forum | 0 | 16th July 2015 04:57 PM |
SSC Junior Engineer Model Paper | Unregistered | Main Forum | 0 | 16th July 2015 01:45 PM |
SSC Junior Engineer Mechanical Old Question Papers | Unregistered | Main Forum | 0 | 15th July 2015 01:10 PM |
UPPSC Syllabus for Junior Engineer Mechanical | Unregistered | Main Forum | 0 | 11th July 2015 12:50 PM |
ISM M.Tech mechanical engineering Entrance Exam paper | Unregistered | Main Forum | 1 | 21st October 2014 10:34 AM |
After Diploma Mechanical Engineering can join B tech Marine Engineering | Unregistered | Main Forum | 1 | 21st October 2014 09:19 AM |
After Mechanical Engineering eligible for M.E Aerospace Engineering or not | Unregistered | Main Forum | 1 | 20th October 2014 03:32 PM |
Marine engineering course after b. Tech in mechanical engineering | Unregistered | Main Forum | 1 | 18th October 2014 01:18 PM |
Marine Engineering after B.Tech in mechanical Engineering | Unregistered | Main Forum | 1 | 17th October 2014 01:09 PM |
Rubber Board - Junior Assistant Model Paper | Unregistered | Main Forum | 1 | 13th October 2014 03:09 PM |
GATE Mechanical Engineering Exam Solved Paper | Unregistered | Main Forum | 1 | 13th October 2014 02:22 PM |
|