Mechanical Engineering
Rahul Kapoor asked • 5 minutes agoWhile calculating the stress induced in a closed coil helical spring, Wahl's factor must be considered to account for - a)The curvature and stress concentration effect
- b)Shock loading
- c)Poor service conditions
- d)Fatigue loading
Correct answer is option 'A'. Can you explain this answer?
While calculating the stress induced in a closed coil helical spring, Wahl's factor must be considered to account for
a)
The curvature and stress concentration effect
b)
Shock loading
c)
Poor service conditions
d)
Fatigue loading
Vineet Garg asked • 10 minutes agoAssertion (A): If the state at a point is pure shear, then the principal planes through that point making an angle of 45° with plane of shearing stress carries principal stresses whose magnitude is equal to that of shearing stress.Reason (R): Complementary shear stresses are equal in magnitude, but opposite in direction.- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is NOT the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): If the state at a point is pure shear, then the principal planes through that point making an angle of 45° with plane of shearing stress carries principal stresses whose magnitude is equal to that of shearing stress.
Reason (R): Complementary shear stresses are equal in magnitude, but opposite in direction.
a)
Both A and R are individually true and R is the correct explanation of A
b)
Both A and R are individually true but R is NOT the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
Ankit Saurabh asked • 21 minutes agoAssertion (A): Spherical washers are used to locate the job in the fixtures.Reason (R): 3-2-1 principle should be adopted to locate the job. - a)Both A and R are true and R is the correct explanation of A
- b)Both A and R arc true but R is NOT the correct explanation of A
- c)A is true hut R is false
- d)A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
Assertion (A): Spherical washers are used to locate the job in the fixtures.
Reason (R): 3-2-1 principle should be adopted to locate the job.
a)
Both A and R are true and R is the correct explanation of A
b)
Both A and R arc true but R is NOT the correct explanation of A
c)
A is true hut R is false
d)
A is false but R is true
Alpesh Jain asked • 34 minutes agoBuyers products company distributes an item known as a tie bar, which is a U-bolt used on truck equipment. The following data have been collected for this item held in inventory.
Monthly demand forecast, d = 11,107 unitsStandard error of forecast = 3,099 unitsReplenishment lead time, LT = 1.5 monthsItem value, C = $ 0.11/unitCost for processing vendor order, S = $ 10/orderCarrying cost, I = 20%/yearIn-stock probability during lead time,P = 75% Find the reorder level... more
Buyers products company distributes an item known as a tie bar, which is a U-bolt used on truck equipment. The following data have been collected for this item held in inventory.
Monthly demand forecast, d = 11,107 units
Monthly demand forecast, d = 11,107 units
Standard error of forecast = 3,099 units
Replenishment lead time, LT = 1.5 months
Item value, C = $ 0.11/unit
Cost for processing vendor order, S = $ 10/order
Carrying cost, I = 20%/year
In-stock probability during lead time,
P = 75% Find the reorder level
Plûtø Mürãli asked • 37 minutes agoA square key of side d/4 is to be fitted on a shaft of diameter d and in the hub of a pulley. If the material of the key and shaft is same and the two are to be equally strong in shear, what is the length of the key? - a)πd/2
- b)2πd/3
- c)3πd/4
- d)4πd/5
Correct answer is option 'A'. Can you explain this answer?
A square key of side d/4 is to be fitted on a shaft of diameter d and in the hub of a pulley. If the material of the key and shaft is same and the two are to be equally strong in shear, what is the length of the key?
a)
πd/2
b)
2πd/3
c)
3πd/4
d)
4πd/5
Sreenath Narayandas asked • 40 minutes agoThe hydro-state thrust bearing consists of six pads; each pad can be approximated as circular area of 500 mm and 100 mm as outer and inner diameters respectively. The total thrust load is 900 kN and film thickness is 0.05 mm and the viscosity of the lubricant is 58.86 cp.Q.Determine the supply pressure- a) 15.36 MPa
- b) 1.11 MPa
- c) 2.56 MPa
- d) 6.67 MPa
Correct answer is option 'C'. Can you explain this answer?
The hydro-state thrust bearing consists of six pads; each pad can be approximated as circular area of 500 mm and 100 mm as outer and inner diameters respectively. The total thrust load is 900 kN and film thickness is 0.05 mm and the viscosity of the lubricant is 58.86 cp.
Q.
Determine the supply pressure
a)
15.36 MPa
b)
1.11 MPa
c)
2.56 MPa
d)
6.67 MPa
Hardik Barot asked • 50 minutes agoA cylindrical elastic body subjected to pure torsion about its axis develops- a)tensile stress in a direction 45º to the axis
- b)no tensile or compressive stress
- c)maximum shear stress along the axis of the shaft
- d)Maximum shear stress at 45º to the axis
Correct answer is option 'A'. Can you explain this answer?
A cylindrical elastic body subjected to pure torsion about its axis develops
a)
tensile stress in a direction 45º to the axis
b)
no tensile or compressive stress
c)
maximum shear stress along the axis of the shaft
d)
Maximum shear stress at 45º to the axis
Abhay Tiwari asked • 52 minutes agoWhich one of the following is represented by the area of the S.F diagram from one end upto a given location on the beam?- a)B.M. at the location
- b)Load at the location
- c)Slope at the location
- d)Deflection at the location
Correct answer is option 'A'. Can you explain this answer?
Which one of the following is represented by the area of the S.F diagram from one end upto a given location on the beam?
a)
B.M. at the location
b)
Load at the location
c)
Slope at the location
d)
Deflection at the location
Amit Verma asked • 54 minutes agoWhich of the following factors could be intangible in Productivity Studies?
Abhishek Govil asked • 1 hour agoThe Euler's equation for the motion of liquids is based upon the assumption that- a)the fluid is non-viscous, homogeneous and incompressible
- b)the velocity of flow is uniform over the section
- c)the flow is continuous, steady and along the stream line
- d)all of the above
Correct answer is option 'D'. Can you explain this answer?
The Euler's equation for the motion of liquids is based upon the assumption that
a)
the fluid is non-viscous, homogeneous and incompressible
b)
the velocity of flow is uniform over the section
c)
the flow is continuous, steady and along the stream line
d)
all of the above
Aadarsh Vikram asked • 1 hour agoIf a two-mass system is dynamically equivalent to a rigid body, then the system will NOT satisfy the condition that the - a)Sum of the two masses must be equal to that of the rigid body
- b)Polar moment of inertia of the system should be equal to that of the rigid body
- c)Centre of gravity (c.g.) of the system should coincide with that of the rigid body
- d)Total moment of inertia about the axis through c.g. must be equal to that of the rigid body
Correct answer is option 'D'. Can you explain this answer?
If a two-mass system is dynamically equivalent to a rigid body, then the system will NOT satisfy the condition that the
a)
Sum of the two masses must be equal to that of the rigid body
b)
Polar moment of inertia of the system should be equal to that of the rigid body
c)
Centre of gravity (c.g.) of the system should coincide with that of the rigid body
d)
Total moment of inertia about the axis through c.g. must be equal to that of the rigid body
Abhishek Govil asked • 1 hour agoThe prime circle of a cam is- a)the circle with center as the center of cam axis and radius such that it passes through the pitch point.
- b)the smallest circle drawn to the cam profile from the center of rotation of a radial cam.
- c)the smallest circle drawn to the pitch curve from the center of rotation of cam.
- d)the cam circle enclosing the cam profile.
Correct answer is option 'C'. Can you explain this answer?
The prime circle of a cam is
a)
the circle with center as the center of cam axis and radius such that it passes through the pitch point.
b)
the smallest circle drawn to the cam profile from the center of rotation of a radial cam.
c)
the smallest circle drawn to the pitch curve from the center of rotation of cam.
d)
the cam circle enclosing the cam profile.
Vekariya Rakesh asked • 1 hour agoConsider the given figure:
Assertion (A): In order to have the same equilibrium speed for the given values of w, W and h, the masses of balls used in the Proell governor are less than those of balls used in the Porter governor.
Reason (R): The ball is fixed to an extension link in Proell governor.... more
Consider the given figure:
Assertion (A): In order to have the same equilibrium speed for the given values of w, W and h, the masses of balls used in the Proell governor are less than those of balls used in the Porter governor.
Reason (R): The ball is fixed to an extension link in Proell governor.
Reason (R): The ball is fixed to an extension link in Proell governor.
Prasad Royal Royal asked • 1 hour agoEuler’s formula gives 5 to 10% error in crippling load as compared to experimental results in practice because- a)effect of direct stress is neglected
- b)pin joints are not free from friction
- c)the assumptions made in using the formula are not met in practice
- d)the material does not behave in an ideal elastic way in tension and compression
Correct answer is option 'A'. Can you explain this answer?
Euler’s formula gives 5 to 10% error in crippling load as compared to experimental results in practice because
a)
effect of direct stress is neglected
b)
pin joints are not free from friction
c)
the assumptions made in using the formula are not met in practice
d)
the material does not behave in an ideal elastic way in tension and compression
Pooja Shende asked • 2 hours agoAssertion (A): At a given temperature, the enthalpy of super-heated steam is the same as that of saturated steam.Reason (R): The enthalpy of vapour at lower pressures is dependent on temperature alone.- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is NOT the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
Assertion (A): At a given temperature, the enthalpy of super-heated steam is the same as that of saturated steam.
Reason (R): The enthalpy of vapour at lower pressures is dependent on temperature alone.
a)
Both A and R are individually true and R is the correct explanation of A
b)
Both A and R are individually true but R is NOT the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
Aadarsh Vikram asked • 2 hours agoA simply supported beam with width 'b' and depth ‟d‟ carries a central load W and undergoes deflection δ at the centre. If the width and depth are interchanged, the deflection at the centre of the beam would attain the value- a)
- b)
- c)
- d)
Correct answer is option 'B'. Can you explain this answer?
A simply supported beam with width 'b' and depth ‟d‟ carries a central load W and undergoes deflection δ at the centre. If the width and depth are interchanged, the deflection at the centre of the beam would attain the value
a)
b)
c)
d)
Mahesh Kumar asked • 2 hours agoWhile using boundary layer equations, Bernoulli's equation- a)can be used anywhere
- b)can be used only outside the boundary layer
- c)can be used only inside the boundary layer
- d)cannot be used either inside or outside the boundary layer
Correct answer is option 'D'. Can you explain this answer?
While using boundary layer equations, Bernoulli's equation
a)
can be used anywhere
b)
can be used only outside the boundary layer
c)
can be used only inside the boundary layer
d)
cannot be used either inside or outside the boundary layer
Wasi Khan asked • 3 hours agoConsider the following statements:If at a section distant from one of the ends of the beam, M represents the bending moment. V the shear force and w the intensity of loading, then1. dM/dx = V2. dV/dx = w 3. dw/dx = y(the deflection of the beam at the section)Select the correct answer using the codes given below:- a)1 and 3
- b)1 and 2
- c)2 and 3
- d)1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements:
If at a section distant from one of the ends of the beam, M represents the bending moment. V the shear force and w the intensity of loading, then
1. dM/dx = V
2. dV/dx = w
3. dw/dx = y
(the deflection of the beam at the section)
Select the correct answer using the codes given below:
a)
1 and 3
b)
1 and 2
c)
2 and 3
d)
1, 2 and 3
Tushika Nath asked • 3 hours agoThe pressures in the evaporator and condenser coils of a refrigeration system have been noted to be equal. This indicates that- a)the system is not functioning
- b)the evaporator load is minimum
- c)the refrigerant is wet at entry to and at exit from the compressor.
- d)there is leakage of refrigerant
Correct answer is option 'A'. Can you explain this answer?
The pressures in the evaporator and condenser coils of a refrigeration system have been noted to be equal. This indicates that
a)
the system is not functioning
b)
the evaporator load is minimum
c)
the refrigerant is wet at entry to and at exit from the compressor.
d)
there is leakage of refrigerant
Jeyaramakodi Madasamy asked • 3 hours agoTrue stress- strain curve for materials is plotted between- a)load/ original cross-sectional area and
change in length/ original length - b)
- c)load/ instantaneous cross-sectional area and change in length / original length
- d)load/ instantaneous area and instantaneous area/ original area
Correct answer is option 'B'. Can you explain this answer?
True stress- strain curve for materials is plotted between
a)
load/ original cross-sectional area and
change in length/ original length
change in length/ original length
b)
c)
load/ instantaneous cross-sectional area and change in length / original length
d)
load/ instantaneous area and instantaneous area/ original area
Kannan Raja asked • 3 hours agoAn involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the- a)tip of the gear and flank of pinion
- b)tip of the pinion and flank of gear
- c)flanks of both gear and pinion
- d)tip of both gear and pinion
Correct answer is option 'A'. Can you explain this answer?
An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the
a)
tip of the gear and flank of pinion
b)
tip of the pinion and flank of gear
c)
flanks of both gear and pinion
d)
tip of both gear and pinion
Bidhan Das asked • 3 hours agoAccording to the Clausius statement of the second law:
1. heat flows from cold surface to hot surface, unaided.
2. heat flows from hot surface to cold surface, unaided.
3. heat can flow from cold surface to hot surface with the aid of external workWhich of the above statements is/are correct?- a)2 only
- b)1 and 3
- c)2 and 3
- d)3 only
Correct answer is option 'C'. Can you explain this answer?
According to the Clausius statement of the second law:
1. heat flows from cold surface to hot surface, unaided.
2. heat flows from hot surface to cold surface, unaided.
3. heat can flow from cold surface to hot surface with the aid of external work
1. heat flows from cold surface to hot surface, unaided.
2. heat flows from hot surface to cold surface, unaided.
3. heat can flow from cold surface to hot surface with the aid of external work
Which of the above statements is/are correct?
a)
2 only
b)
1 and 3
c)
2 and 3
d)
3 only
Raj Bundela asked • 4 hours agoTwo closely coiled helical springs 'A' and 'B' are equal in all respects but the diameter of wire of spring 'A' is double that of spring 'B'. The stiffness of spring 'B' will be- a)one-sixteenth
- b)one- eighth
- c)one-fourth
- d)one-half
Correct answer is option 'A'. Can you explain this answer?
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the diameter of wire of spring 'A' is double that of spring 'B'. The stiffness of spring 'B' will be
a)
one-sixteenth
b)
one- eighth
c)
one-fourth
d)
one-half
Sreenath Narayandas asked • 4 hours agoIn the given figure, find the angle at which the ladder loses its contact with the wall before it hits the ground? Assume centre of mass of ladder moves in a circle and friction less ground and wall.
- a)65°
- b)39°
- c)48.2°
- d)52.8°
Correct answer is option 'C'. Can you explain this answer?
In the given figure, find the angle at which the ladder loses its contact with the wall before it hits the ground? Assume centre of mass of ladder moves in a circle and friction less ground and wall.
a)
65°
b)
39°
c)
48.2°
d)
52.8°
Shivam Saxena asked • 4 hours agoConsider the following statements: 1. The degree of freedom for lower kinematic pairs is always equal to one.
2. A ball-and-socket joint has 3 degrees of freedom and is a higher kinematic pair
3.Oldham's coupling mechanism has two prismatic pairs and two revolute pairs.Which of the statements given above is/are correct?[IES-2005]- a)1, 2 and 3
- b)1 only
- c)2 and 3
- d)3 only
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements:
1. The degree of freedom for lower kinematic pairs is always equal to one.
2. A ball-and-socket joint has 3 degrees of freedom and is a higher kinematic pair
3.Oldham's coupling mechanism has two prismatic pairs and two revolute pairs.
2. A ball-and-socket joint has 3 degrees of freedom and is a higher kinematic pair
3.Oldham's coupling mechanism has two prismatic pairs and two revolute pairs.
Which of the statements given above is/are correct?
[IES-2005]
a)
1, 2 and 3
b)
1 only
c)
2 and 3
d)
3 only
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