Mechanical Engineering
Abhishek Govil asked • 2 minutes agoFor two governors A and B, the lift of sleeve of governor A is more than that of governor B, fora given fractional change in speed. It indicates that- a)governor A is more sensitive than governor B
- b)governor B is more sensitive than governor A
- c)both governor A and B are equally sensitive
- d)none of the above
Correct answer is option 'A'. Can you explain this answer?
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, fora given fractional change in speed. It indicates that
a)
governor A is more sensitive than governor B
b)
governor B is more sensitive than governor A
c)
both governor A and B are equally sensitive
d)
none of the above
Nilesh Dalai asked • 6 minutes agoSelect the wrong statement:- a)natural rubber is an elastic material present in the latex of certain plants
- b)paints contain no pigments
- c)concrete is extremely weak in tension
- d)mineral wool is used for heat insulation in high temperature furnaces
Correct answer is option 'B'. Can you explain this answer?
Select the wrong statement:
a)
natural rubber is an elastic material present in the latex of certain plants
b)
paints contain no pigments
c)
concrete is extremely weak in tension
d)
mineral wool is used for heat insulation in high temperature furnaces
Tanuja Kumari asked • 6 minutes agoThe discharge through a large rectangular orifice is given bywhere H1= Height of the liquid above the top of the orifice,
H2= Height of the liquid abvoe the bottom of the orifice,
b = Breadth of the orifice, and
Cd= Coefficient of discharge- a)
- b)
- c)
- d)
Correct answer is option 'C'. Can you explain this answer?
The discharge through a large rectangular orifice is given by
where H1= Height of the liquid above the top of the orifice,
H2= Height of the liquid abvoe the bottom of the orifice,
b = Breadth of the orifice, and
Cd= Coefficient of discharge
H2= Height of the liquid abvoe the bottom of the orifice,
b = Breadth of the orifice, and
Cd= Coefficient of discharge
a)
b)
c)
d)
Abhishek Govil asked • 55 minutes agoThe mechanism used in a shaping machine is- a)a closed 4-bar chain having 4 revolute pairs
- b)a closed 6-bar chain having 6 revolute pairs
- c)a closed 4-bar chain having 2 revolute and 2 sliding pairs
- d)an inversion of the single slider crank chain
Correct answer is option 'D'. Can you explain this answer?
The mechanism used in a shaping machine is
a)
a closed 4-bar chain having 4 revolute pairs
b)
a closed 6-bar chain having 6 revolute pairs
c)
a closed 4-bar chain having 2 revolute and 2 sliding pairs
d)
an inversion of the single slider crank chain
Mohd Vaseem asked • 59 minutes agoNewton's law of viscosity is a relationship between- a)shear stress and the rate of angular distortion
- b)shear stress and viscosity
- c)shear stress, velocity and viscosity
- d)pressure, velocity and viscosity
- e)shear stress, pressure and rate of angular distortion.
Correct answer is option 'A'. Can you explain this answer?
Newton's law of viscosity is a relationship between
a)
shear stress and the rate of angular distortion
b)
shear stress and viscosity
c)
shear stress, velocity and viscosity
d)
pressure, velocity and viscosity
e)
shear stress, pressure and rate of angular distortion.
Shubham Pandey asked • 1 hour agoAssertion (A): Efficiency of a reversible engine operating between temperature limits T1 and T2 is maximum.Reason (R): Efficiency of a reversible engine is greater than that of an irreversible engine.- 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 'A'. Can you explain this answer?
Assertion (A): Efficiency of a reversible engine operating between temperature limits T1 and T2 is maximum.
Reason (R): Efficiency of a reversible engine is greater than that of an irreversible engine.
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
Wasi Khan asked • 1 hour agoBy conjugate beam method, the slope at any section of an actual beam is equal to :- a)EI times the S.F. of the conjugate beam
- b)EI times the B.M. of the conjugate beam
- c)S.F. of conjugate beam
- d)B.M. of the conjugate beam
Correct answer is option 'C'. Can you explain this answer?
By conjugate beam method, the slope at any section of an actual beam is equal to :
a)
EI times the S.F. of the conjugate beam
b)
EI times the B.M. of the conjugate beam
c)
S.F. of conjugate beam
d)
B.M. of the conjugate beam
suvesh bajpai asked • 1 hour agoA length of 10 mm diameter steel wire is coiled to a close coiled helical spring having 8 coils of 75 mm mean diameter, and the spring has a stiffness K. If the same length of wire is coiled to 10 coils of 60 mm mean diameter, then the spring stiffness will be
- a) K
- b) 1.25 K
- c) 1.56 K
- d) 1.96 k
Correct answer is option 'C'. Can you explain this answer?
A length of 10 mm diameter steel wire is coiled to a close coiled helical spring having 8 coils of 75 mm mean diameter, and the spring has a stiffness K. If the same length of wire is coiled to 10 coils of 60 mm mean diameter, then the spring stiffness will be
a)
Kb)
1.25 Kc)
1.56 Kd)
1.96 k 
Pawan Tiwari asked • 1 hour agoDirection: Each of the next consists of two statements, one labeled as the 'Assertion (A)' and
the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes:
(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 Statement (I) : Specific output of a SI engine is higher than the CI engine
Statement (II): Its higher engine mixture result in ability to burn richer mixture result in increased
energy conversion rate.- a)A
- b)B
- c)C
- d)D
Correct answer is option 'B'. Can you explain this answer?
Direction: Each of the next consists of two statements, one labeled as the 'Assertion (A)' and
the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes:
(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
the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes:
(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
Statement (I) : Specific output of a SI engine is higher than the CI engine
Statement (II): Its higher engine mixture result in ability to burn richer mixture result in increased
energy conversion rate.
Statement (II): Its higher engine mixture result in ability to burn richer mixture result in increased
energy conversion rate.
a)
A
b)
B
c)
C
d)
D
Gr Ram asked • 1 hour agoMatch the items in columns I and II
Match the items in columns I and II
- a)a
- b)b
- c)c
- d)d
Correct answer is 'A'. Can you explain this answer?
Deivendira Brabu asked • 2 hours agoThe primal of a LP problem is maximization of objective function with 6 variables and 2 constraints.Which of the following correspond to the dual of the problem stated?
1. It has 2 variables and 6 constraints
2. It has 6 variables and 2 constraints
3. Maximization of objective function
4. Minimization of objective functionSelect the correct answer using the codes given below: - a)1 and 3
- b)1 and 4
- c)2 and 3
- d)2 and 4
Correct answer is option 'B'. Can you explain this answer?
The primal of a LP problem is maximization of objective function with 6 variables and 2 constraints.
Which of the following correspond to the dual of the problem stated?
1. It has 2 variables and 6 constraints
2. It has 6 variables and 2 constraints
3. Maximization of objective function
4. Minimization of objective function
1. It has 2 variables and 6 constraints
2. It has 6 variables and 2 constraints
3. Maximization of objective function
4. Minimization of objective function
Select the correct answer using the codes given below:
a)
1 and 3
b)
1 and 4
c)
2 and 3
d)
2 and 4
Abhishek Govil asked • 2 hours agoMatch List-I (Product) with List-II (Process of Manufacture) and select the correct answer
using the codes given below the lists :List-I
A. Automobile piston in aluminium alloy
B. Engine crankshaft in spheroidal graphite iron
C. Carburettor housing in aluminium alloy
D. Cast titanium bladesList-II
1. Pressure die-casting
2. Gravity die-casting
3. Sand casting
4. Precision investment casting
5. Shell moulding
- a)A
- b)B
- c)C
- d)D
Correct answer is option 'A'. Can you explain this answer?
Match List-I (Product) with List-II (Process of Manufacture) and select the correct answer
using the codes given below the lists :
using the codes given below the lists :
List-I
A. Automobile piston in aluminium alloy
B. Engine crankshaft in spheroidal graphite iron
C. Carburettor housing in aluminium alloy
D. Cast titanium blades
A. Automobile piston in aluminium alloy
B. Engine crankshaft in spheroidal graphite iron
C. Carburettor housing in aluminium alloy
D. Cast titanium blades
List-II
1. Pressure die-casting
2. Gravity die-casting
3. Sand casting
4. Precision investment casting
5. Shell moulding
1. Pressure die-casting
2. Gravity die-casting
3. Sand casting
4. Precision investment casting
5. Shell moulding
a)
A
b)
B
c)
C
d)
D
Kishan Pathak asked • 2 hours agoAccording to lami's theorem- a)the three forces must be equal
- b)the three forces must be at 120º to each other
- c)the three forces must be in equilibrium
- d)if the three forces acting at a point are in equilibrium, then each force is proportionalto the sine of the angle between the other two
Correct answer is option 'D'. Can you explain this answer?
According to lami's theorem
a)
the three forces must be equal
b)
the three forces must be at 120º to each other
c)
the three forces must be in equilibrium
d)
if the three forces acting at a point are in equilibrium, then each force is proportionalto the sine of the angle between the other two
Abhishek Govil asked • 3 hours agoA cantilever beam of length L is subjected to a moment M at the free end. The moment of inertia of the beam cross section about the neutral axis is I and the Young's modulus is E. The magnitude of the maximum deflection is- a)
- b)
- c)
- d)
Correct answer is option 'A'. Can you explain this answer?
A cantilever beam of length L is subjected to a moment M at the free end. The moment of inertia of the beam cross section about the neutral axis is I and the Young's modulus is E. The magnitude of the maximum deflection is
a)
b)
c)
d)
Aadarsh Vikram asked • 3 hours agoConsider the following two processes:a. A heat source at 1200 K loses 2500 kJ of heat to sink at 800 Kb. A heat source at 800 K loses 2000 kJ of heat to sink at 500 KWhich of the following statements is TRUE?- a)Process I is more irreversible than Process II
- b)Process II is more irreversible than Process I
- c)Irreversibility associated in both the processes is equal
- d)Both the processes are reversible
Correct answer is option 'B'. Can you explain this answer?
Consider the following two processes:
a. A heat source at 1200 K loses 2500 kJ of heat to sink at 800 K
b. A heat source at 800 K loses 2000 kJ of heat to sink at 500 K
Which of the following statements is TRUE?
a)
Process I is more irreversible than Process II
b)
Process II is more irreversible than Process I
c)
Irreversibility associated in both the processes is equal
d)
Both the processes are reversible
Sreenath Narayandas asked • 3 hours agoA small maintenance project consists of the following 10 jobs, whose precedence, relationships are identified by their node numbers:
Q.What is the earliest and latest start and finish times for job F?- a) [7, 13] [7, 13]
- b) [7, 14] [7, 15]
- c) [7, 9] [14, 16]
- d) [9, 17] [12, 20]
Correct answer is option 'A'. Can you explain this answer?
A small maintenance project consists of the following 10 jobs, whose precedence, relationships are identified by their node numbers:
Q.
What is the earliest and latest start and finish times for job F?
a)
[7, 13] [7, 13]
b)
[7, 14] [7, 15]
c)
[7, 9] [14, 16]
d)
[9, 17] [12, 20]
Narendra Nari asked • 3 hours agoWhich of the following effects are possible due to residual stresses in welding? 1. Reduce dimensional stability. 2. Weld cracking.3. Effect on fatigue strength 4. Reduction in the creep strength.Select the correct answer using the code given below: - a)1 and 2 only
- b)2 and 3 only
- c)1 and 3 only
- d)1, 2, 3 and 4
Correct answer is option 'D'. Can you explain this answer?
Which of the following effects are possible due to residual stresses in welding?
1. Reduce dimensional stability.
2. Weld cracking.
3. Effect on fatigue strength
4. Reduction in the creep strength.
Select the correct answer using the code given below:
a)
1 and 2 only
b)
2 and 3 only
c)
1 and 3 only
d)
1, 2, 3 and 4
Udeshya Kumar Gupta asked • 3 hours agoConsider the following statements about antifriction bearing?
Jayananda Dehury asked • 3 hours agoWorm working or semi-hot working process, which is the plastic deformation of metal or alloy under conditions of temperature and strain rate, is performed to eliminate drawbacks of - a) cold working process
- b) hot working process
- c) both cold and hot working processes
- d) none of the above
Correct answer is option 'C'. Can you explain this answer?
Worm working or semi-hot working process, which is the plastic deformation of metal or alloy under conditions of temperature and strain rate, is performed to eliminate drawbacks of
a)
cold working process
b)
hot working process
c)
both cold and hot working processes
d)
none of the above
Prashant Dahiya asked • 3 hours agoMatch List-I (Theory of Failure) with List-II (Predicted Ratio of Shear Stress to Direct Stress at Yield Condition for Steel Specimen) and select the correct answer using the code given below the Lists:
[IES-2006]- a)A
- b)B
- c)C
- d)D
Correct answer is option 'D'. Can you explain this answer?
Match List-I (Theory of Failure) with List-II (Predicted Ratio of Shear Stress to Direct Stress at Yield Condition for Steel Specimen) and select the correct answer using the code given below the Lists:
[IES-2006]
a)
A
b)
B
c)
C
d)
D
Sreenath Narayandas asked • 3 hours agoIn the manufacturing firm the operators re-assigned with each one of the machine. The cost for assigning each machine is depicted in the following table.
Q.What is the optimal schedule?- a) A-II, B-IV, C-III, D-I
- b) A-III, B-II, C-IV, D-I
- c) A-II, B-I, C-III, D-IV
- d) A-IV, B-I, C-II, D-III
Correct answer is option 'A'. Can you explain this answer?
In the manufacturing firm the operators re-assigned with each one of the machine. The cost for assigning each machine is depicted in the following table.
Q.
What is the optimal schedule?
a)
A-II, B-IV, C-III, D-I
b)
A-III, B-II, C-IV, D-I
c)
A-II, B-I, C-III, D-IV
d)
A-IV, B-I, C-II, D-III
Hemant Bhagat asked • 3 hours agoArrange the following materials in order of their increasing die life :- a)brass, cast iron, zinc and aluminium
- b)brass, cast iron, aluminium and zinc
- c)cast iron, brass, aluminium and zink
- d)cast iron, brass, zinc and aluminium
Correct answer is option 'C'. Can you explain this answer?
Arrange the following materials in order of their increasing die life :
a)
brass, cast iron, zinc and aluminium
b)
brass, cast iron, aluminium and zinc
c)
cast iron, brass, aluminium and zink
d)
cast iron, brass, zinc and aluminium
Debasish Bisoyee asked • 4 hours agoA straight bar is fixed at edges A and B. its elastic modulus is E and cross-section is A. There is a load P = 120 N acting at C. The reactions at the ends are
- a)60 N at A, 60 N at B
- b)30 N at A, 90 N at B
- c)40 N at A, 80 N at B
- d)80 N at A, 40 N at B
Correct answer is option 'D'. Can you explain this answer?
A straight bar is fixed at edges A and B. its elastic modulus is E and cross-section is A. There is a load P = 120 N acting at C. The reactions at the ends are
a)
60 N at A, 60 N at B
b)
30 N at A, 90 N at B
c)
40 N at A, 80 N at B
d)
80 N at A, 40 N at B
Shubham Sharma asked • 4 hours agoAssertion (A): If the bending moment diagram is a rectangle, it indicates that the beam is loaded by a uniformly distributed moment all along the length.Reason (R): The BMD is a representation of internal forces in the beam and not the moment applied on the beam.- 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): If the bending moment diagram is a rectangle, it indicates that the beam is loaded by a uniformly distributed moment all along the length.
Reason (R): The BMD is a representation of internal forces in the beam and not the moment applied on the beam.
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
Tarun Kumar asked • 4 hours agoWhich of the following are the requirements of an ideal gating system?1. The molten metal should enter the mould cavity with as high a velocity as possible2. It should facilitate complete filling of the mould cavity. 3. It should be able to prevent the absorption of air or gases from the surroundings on the molten metal while flowing through it.Select the correct answer using the codes given below: - a)1, 2 and 3
- b)1 and 2
- c)2 and 3
- d)1 and 3
Correct answer is option 'C'. Can you explain this answer?
Which of the following are the requirements of an ideal gating system?
1. The molten metal should enter the mould cavity with as high a velocity as possible
2. It should facilitate complete filling of the mould cavity.
3. It should be able to prevent the absorption of air or gases from the surroundings on the molten metal while flowing through it.
Select the correct answer using the codes given below:
a)
1, 2 and 3
b)
1 and 2
c)
2 and 3
d)
1 and 3
Ujjwal Sonewane asked • 4 hours agoIf cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be- a)higher than the surface of liquid
- b)the same as the surface of liquid
- c)lower than the surface of liquid
- d)unpredictable
- e)none of the above
Correct answer is option 'C'. Can you explain this answer?
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
a)
higher than the surface of liquid
b)
the same as the surface of liquid
c)
lower than the surface of liquid
d)
unpredictable
e)
none of the above
Abhishek Govil asked • 5 hours agoAccording to Newton's first law of motion- a)every body cotinues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
- b)the rate of change of momentum is directly proportional to the impressed force, andtakes place in the same direction, in which the force acts
- c)to every action, there is always an equal and opposite reaction
- d)none of the above
Correct answer is option 'A'. Can you explain this answer?
According to Newton's first law of motion
a)
every body cotinues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
b)
the rate of change of momentum is directly proportional to the impressed force, andtakes place in the same direction, in which the force acts
c)
to every action, there is always an equal and opposite reaction
d)
none of the above
Sai Teja asked • 5 hours agoA round rod of annealed bras 70-30 is being drawn from a diameter of 8 mm to a diameter of 4 mm at a speed of 0.8 m/s. (k = 895 MPa, n = 0.49)Q.The power required in this operation is- a)3.497 kW
- b)1.47 kW
- c)2.88 kW
- d)2.32 kW
Correct answer is option 'A'. Can you explain this answer?
A round rod of annealed bras 70-30 is being drawn from a diameter of 8 mm to a diameter of 4 mm at a speed of 0.8 m/s. (k = 895 MPa, n = 0.49)
Q.
The power required in this operation is
a)
3.497 kW
b)
1.47 kW
c)
2.88 kW
d)
2.32 kW
Abhishek Aute Aute asked • 5 hours agoIn an axial flow impulse turbine, energy transfer takes place due to - a)Change in relative kinetic energy
- b)Change in absolute kinetic energy
- c)Change in pressure energy
- d)Change in energy because of centrifugal force
Correct answer is option 'B'. Can you explain this answer?
In an axial flow impulse turbine, energy transfer takes place due to
a)
Change in relative kinetic energy
b)
Change in absolute kinetic energy
c)
Change in pressure energy
d)
Change in energy because of centrifugal force
Ranga Nathan asked • 5 hours agoThe three major types of forecasts used by business organizations are- a)strategic, tactical and operational
- b)economic, technological and demand
- c)exponential, smoothing, delphi and regression
- d)casual, time-series and seasona
Correct answer is option 'B'. Can you explain this answer?
The three major types of forecasts used by business organizations are
a)
strategic, tactical and operational
b)
economic, technological and demand
c)
exponential, smoothing, delphi and regression
d)
casual, time-series and seasona
Dharmendra Singh asked • 6 hours agoA hydraulic jump occurs in a channel- a)whenever the flow is supercritical
- b)if the flow is controlled by a sluice gate
- c)if the bed slope changes from mild to steep
- d)if the bed slope changes from steep to mild
Correct answer is option 'A'. Can you explain this answer?
A hydraulic jump occurs in a channel
a)
whenever the flow is supercritical
b)
if the flow is controlled by a sluice gate
c)
if the bed slope changes from mild to steep
d)
if the bed slope changes from steep to mild
Mayur Chawla asked • 6 hours agoTo restore stable operating condition in a hydrodynamic journal bearing, when it encounters higher magnitude loads, - a)Oil viscosity is to be decreased
- b)oil viscosity is to be increased
- c)Oil viscosity index is to be increased
- d)oil viscosity index is to be decreased
Correct answer is option 'B'. Can you explain this answer?
To restore stable operating condition in a hydrodynamic journal bearing, when it encounters higher magnitude loads,
a)
Oil viscosity is to be decreased
b)
oil viscosity is to be increased
c)
Oil viscosity index is to be increased
d)
oil viscosity index is to be decreased
For f(t) = cos h mt, the Laplace transformation is…..
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