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Mechanical Question Answers Competitive Exams Online MCQ Quiz

Mechanical Engineering MCQ Questions Answers for competitive exams: This mock test having 25 question each, with four choices. On each click on answers system will tell you where the answers is correct or incorrect. You can view this Mechanical Engineering test question details at the end of the quiz.

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Mechanical Engineering Questions Answers

This Mechanical questions answers are applicable for any kind of entrance exam or job related exam especially for P.O. GATE, IIT JAM and other placement examination. You practice as much as you can so gather knowledge of how to answers Mechanical Engineering critical type papers in short time and this can be a big factor for cracking any exam.



Mechanical Engineering (ME)

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Question 1
Given that x+3x=0, and x(0)= 1, x(0)=0, what is x(1)?
A
— 099
B
— 0.16
C
0.16
D
0.99
Question 2
A coin is tossed 4 times .What is the probability of getting heads exactly 3 times?
A
1/4
B
3/8
C
1/3
D
3/4
Question 3
The transverse shear stress acting in a beam of rectangular cross-section, subjected to a transverse shear load is
A
Variable with maximum at the bottom of the beam
B
Variable with maximum at the top of the beam
C
Uniform
D
Variable with maximum of the neutral axis
Question 4
A rod of Length L and diameter D is subjected to a tensile load P. Which of the following is sufficient to calculate the resulting chance in diameter?
A
Young’s modulus
B
Shear modulus
C
Poisson’s ratio
D
Both Young’s modulus and shear modulus
Question 5
A planar mechanism has 8 link and 10 rotary joints. The number of degrees of freedom of the mechanism, using Gruebler’s criterion, is
A
0
B
1
C
2
D
3
Question 6
An axial residual compressive stress due to a manufacturing process is present on the outer surface of a rotating shaft subjected to bending. Under a given bending load, the fatigue life of the shaft in the presence of the residual compressive stress is
A
Decreased
B
Increased or decreased, depending on the external bending load
C
Neither decreased nor increased
D
Increased
Question 7
2 moles of oxygen are mixed adiabatically with another mole of oxygen in mixing chamber, so that the final total pressure and temperature of the mixture become same as those of the individual constituents at their initial states. The universal gas constant is given as R. The change in entropy due to mixing, per mole of oxygen is given by
A
— Rln2
B
0
C
R ln2
D
R ln4
Question 8
Which one of the following is NOT a necessary assumption for the air-standard Otto cycle?
A
All processes are both internally as well as externally reversible
B
Intake and exhaust processes are constant volume heat rejection processes
C
The combustion process is a constant volume heat addition process
D
The working fluid is an ideal gas with constant specific heats
Question 9
Internal gear cutting operation can be performed by
A
milling
B
shaping with rack cutler
C
shaping with pinion cutter
D
bobbing
Question 10
For whet value of a, if any, will the following system of equations in x, y and z have a solution?2x + 3y =4x+y+ x=4x+2y-z=a
A
Any real Number
B
0
C
1
D
there is no such value
Question 11
A solid circular shaft of diameter 100 mm is subjected to an axial stress of 50MPa. It is further subjected to a torque of 10 kNm. The maximum principal stress experienced on the shaft is closest to
A
41 MPa
B
8 MPa
C
164 MPa
D
204 MPa
Question 12
A compression spring is made of music wire of 2 mm diameter having a shear strength and snear modulus of 800 MPa and 80 GPa respectively The mean coil diameter is 20 mm. free length is 4O mm and the number of active coils is 10. If the mean coil diameter is reduced to 10mm. the stiffness of the spring is approximately
A
decreased by 8 times
B
decreased by 2 times
C
increased by 2 times
D
increased by 8 times
Question 13
A clutch has outer and inner diameters 100 ram and 40 mm respectively. Assuming a uniform pressure of 2 MPa and coefficient of friction of liner material 0.4. the torque carrying capacity of the clutch is
A
148 Nm
B
196 Nm
C
372 Nm
D
490 Nm
Question 14
A spur gear has a module of 3 mm. number of teeth 16, a face width of 36 mm and a pressure angle of 2. It is transmitting a power of 3 kW at 20 rev/s. taking a velocity factor of 1.5, and a form factor of 0.3, the stress in the gear tooth is about
A
32 MPa
B
46 MPa
C
58 MPa
D
70 MPa
Question 15
A two dimensional fluid element rotates like a rigid body. At a point within the element, the pressure is 1 unit. Radius of the Mohr’s circle, characterizing the state of stress at that point, is
A
0.5 unit
B
0 unit
C
1 unit
D
2 unit
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