Mechanical Engineering
Anil Dhole asked • 20 minutes agoDuring heating and humidification ,the final relative humidity of air?
Alpesh Jain asked • 26 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
Abhishek Govil asked • 1 hour agoWhen a body is placed over a liquid, it will sink down if- a)gravitational force is equal to the up thrustof the liquid
- b)gravitational force is less than the up thrustof the liquid
- c)gravitational force is more than the up thrustof the liquid
- d)none of the above
Correct answer is option 'C'. Can you explain this answer?
When a body is placed over a liquid, it will sink down if
a)
gravitational force is equal to the up thrustof the liquid
b)
gravitational force is less than the up thrustof the liquid
c)
gravitational force is more than the up thrustof the liquid
d)
none of the above
KESHAV GOYAL asked • 1 hour agoA butt welded joint, subjected to tensile force P is shown in the given figure, l = length of the weld (in mm) h = throat of the butt weld (in mm) and H is the total height of weld including reinforcement. The average tensile stress st in
- a)
- b)
- c)
- d)
Correct answer is option 'B'. Can you explain this answer?
A butt welded joint, subjected to tensile force P is shown in the given figure, l = length of the weld (in mm) h = throat of the butt weld (in mm) and H is the total height of weld including reinforcement. The average tensile stress st in
a)
b)
c)
d)
Rahul Kapoor asked • 1 hour 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
Aadarsh Vikram asked • 1 hour agoAssertion (A): The change in availability of a system is equal to the change in the Gibbs function of the system at constant temperature and pressure.
Reason (R): The Gibbs function is useful when evaluating the availability of systems in which chemical reactions occur.- 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): The change in availability of a system is equal to the change in the Gibbs function of the system at constant temperature and pressure.
Reason (R): The Gibbs function is useful when evaluating the availability of systems in which chemical reactions occur.
Reason (R): The Gibbs function is useful when evaluating the availability of systems in which chemical reactions occur.
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
Rock Rock asked • 1 hour agoAssertion (A): A dynamically balanced system of multiple rotors on a shaft can rotate smoothly at the critical speeds of the system.Reason (R): Dynamic balancing eliminates all the unbalanced forces and couples from the system. - 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)None of the above
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): A dynamically balanced system of multiple rotors on a shaft can rotate smoothly at the critical speeds of the system.
Reason (R): Dynamic balancing eliminates all the unbalanced forces and couples from the system.
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)
None of the above
Ashwani Patel asked • 2 hours agoMatch List-I (Materials) with List-II (Stress-Strain curves) and select the correct answer using the codes given below the lists:
List-I
A. Mild steel
B. Pure copper
C. Cast iron
D. Pure aluminium
List-II
Codes:
A B C D
(a) 3 1 4 1
(b) 3 2 4 2
(c) 2 4 3 1
(d) 4 1 3 2- a)(a)
- b)(b)
- c)(c)
- d)(d)
Correct answer is option 'D'. Can you explain this answer?
Match List-I (Materials) with List-II (Stress-Strain curves) and select the correct answer using the codes given below the lists:
List-I
A. Mild steel
B. Pure copper
C. Cast iron
D. Pure aluminium
List-II
Codes:
A B C D
(a) 3 1 4 1
(b) 3 2 4 2
(c) 2 4 3 1
(d) 4 1 3 2
List-I
A. Mild steel
B. Pure copper
C. Cast iron
D. Pure aluminium
List-II
Codes:
A B C D
(a) 3 1 4 1
(b) 3 2 4 2
(c) 2 4 3 1
(d) 4 1 3 2
a)
(a)
b)
(b)
c)
(c)
d)
(d)
Shafiq Sayyad Sayyad asked • 2 hours agoStress concentration factor is defined as the ratio of- a)maximum stress to the endurance limit
- b)nominal stress to the enurance limit
- c)maximum stress to the nominal stress
- d)nominal stress to the maximum stress
Correct answer is option 'C'. Can you explain this answer?
Stress concentration factor is defined as the ratio of
a)
maximum stress to the endurance limit
b)
nominal stress to the enurance limit
c)
maximum stress to the nominal stress
d)
nominal stress to the maximum stress
Demon21 Exposed asked • 2 hours agoA Carnot engine operates between temperature 1000 K and 400 K. The heat rejected by the first Carnot engine is used by the second Carnot engine, whose sink temperature is 200 K. If the net heat absorbed by the first Carnot engine is 200 MJ. What is the heat rejected (in MJ) by the second Carnot engine?- a)40
- b)50
- c)60
- d)70
Correct answer is option 'A'. Can you explain this answer?
A Carnot engine operates between temperature 1000 K and 400 K. The heat rejected by the first Carnot engine is used by the second Carnot engine, whose sink temperature is 200 K. If the net heat absorbed by the first Carnot engine is 200 MJ. What is the heat rejected (in MJ) by the second Carnot engine?
a)
40
b)
50
c)
60
d)
70
Selvakumar Baskar asked • 3 hours agoWhich one of the following welding processes consists of minimum heat affected zone (HAZ)? - a)Shielded Metal Arc Welding (SMA W)
- b)Laser Beam Welding (LBW)
- c)Ultrasonic Welding (USW)
- d)Metal Inert Gas Welding (MIG)
Correct answer is option 'B'. Can you explain this answer?
Which one of the following welding processes consists of minimum heat affected zone (HAZ)?
a)
Shielded Metal Arc Welding (SMA W)
b)
Laser Beam Welding (LBW)
c)
Ultrasonic Welding (USW)
d)
Metal Inert Gas Welding (MIG)
Shruti Srivastava Srivas asked • 3 hours agoThe centre of buoyancy is- a)centre of gravity of the body
- b)point of intersection of the buoyant force and the gravitational force
- c)point of intersection of the buoyant force and the centre line of the body
- d)centre of the volume of the displaced fluid
Correct answer is option 'D'. Can you explain this answer?
The centre of buoyancy is
a)
centre of gravity of the body
b)
point of intersection of the buoyant force and the gravitational force
c)
point of intersection of the buoyant force and the centre line of the body
d)
centre of the volume of the displaced fluid
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
Osler Ruskin asked • 4 hours agoIn a tensile test, near the elastic limit zone- a)tensile stress increases at a faster rate
- b)tensile stress decreases at a faster rate
- c)tensile stress increases in linear proportion to the stress
- d)tensile stress decreases in linear proportion to the stress
Correct answer is option 'B'. Can you explain this answer?
In a tensile test, near the elastic limit zone
a)
tensile stress increases at a faster rate
b)
tensile stress decreases at a faster rate
c)
tensile stress increases in linear proportion to the stress
d)
tensile stress decreases in linear proportion to the stress
Tarun Kumar asked • 4 hours agoAssertion (A): Water will freeze at a higher temperature if the pressure is increased.
Reason (R): Water expands on freezing which by Clapeyron's equation gives negative slope for the melting curve.- 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): Water will freeze at a higher temperature if the pressure is increased.
Reason (R): Water expands on freezing which by Clapeyron's equation gives negative slope for the melting curve.
Reason (R): Water expands on freezing which by Clapeyron's equation gives negative slope for the melting curve.
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
Shubham Verma asked • 4 hours agotwo like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are- a)15 N and 5 N
- b)20 N and 5 N
- c)15 N and 15 N
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are
a)
15 N and 5 N
b)
20 N and 5 N
c)
15 N and 15 N
d)
none of these
Hardik Barot asked • 4 hours 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
Abhishek Govil asked • 4 hours agoThe tool life is said to be over if- a)poor surface finish is obtained
- b)there is sudden increase in cutting forces and power consumption
- c)overheating and fuming due to heat of friction starts
- d)all of the above
Correct answer is option 'D'. Can you explain this answer?
The tool life is said to be over if
a)
poor surface finish is obtained
b)
there is sudden increase in cutting forces and power consumption
c)
overheating and fuming due to heat of friction starts
d)
all of the above
Bidhan Das asked • 4 hours agoIn the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements.Statements:I. Some pen are black.II. Some pen are blue.III. No black is red.Conclusions:I. No pen is red.II. Some blue are black.III. Some black are pens.- a)Only I
- b)Only II
- c)Only III
- d)Only II and III
Correct answer is option 'C'. Can you explain this answer?
In the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements.
Statements:
I. Some pen are black.
II. Some pen are blue.
III. No black is red.
Conclusions:
I. No pen is red.
II. Some blue are black.
III. Some black are pens.
a)
Only I
b)
Only II
c)
Only III
d)
Only II and III
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
Manoj Dubey asked • 5 hours agoWhich of the following heat flow situations pertains to free or natural convection?- a)cooling of internal combustion engines
- b)flow of water inside the condenser tubes
- c)cooling of billets in atmosphere
- d)air-conditioning installations and nuclear reactors
Correct answer is option 'C'. Can you explain this answer?
Which of the following heat flow situations pertains to free or natural convection?
a)
cooling of internal combustion engines
b)
flow of water inside the condenser tubes
c)
cooling of billets in atmosphere
d)
air-conditioning installations and nuclear reactors
Dharmendra Singh asked • 6 hours agoWhich one of the following sets of acceleration is involved in the motion of the piston inside thecylinder of a uniformly rotating cylinder mechanism ?- a)Coriolis and radial acceleration
- b)Radial and tangential acceleration
- c)Coriolis and gyroscopic acceleration
- d)Gyroscopic and tangential acceleration
Correct answer is option 'A'. Can you explain this answer?
Which one of the following sets of acceleration is involved in the motion of the piston inside thecylinder of a uniformly rotating cylinder mechanism ?
a)
Coriolis and radial acceleration
b)
Radial and tangential acceleration
c)
Coriolis and gyroscopic acceleration
d)
Gyroscopic and tangential acceleration
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
Abhishek Govil asked • 6 hours agoAn elastic body is subjected to a tensile stress X in a particular direction and a compressive stressY in its perpendicular direction. X and Y are unequal in magnitude. On the plane of maximumshear stress in the body there will be- a)no normal stress
- b)also the maximum normal stress
- c)the minimum normal stress
- d)both normal stress and shear
Correct answer is option 'D'. Can you explain this answer?
An elastic body is subjected to a tensile stress X in a particular direction and a compressive stressY in its perpendicular direction. X and Y are unequal in magnitude. On the plane of maximumshear stress in the body there will be
a)
no normal stress
b)
also the maximum normal stress
c)
the minimum normal stress
d)
both normal stress and shear
Saurav Chaturvedi asked • 6 hours agoAssertion (A): In a composite shaft having two concentric shafts of different materials, the torque shared by each shaft is directly proportional to its polar moment of inertia.Reason (R): In a composite shaft having concentric shafts of different materials, the angle of twist for each shaft depends upon its polar moment of inertia.- 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 'C'. Can you explain this answer?
Assertion (A): In a composite shaft having two concentric shafts of different materials, the torque shared by each shaft is directly proportional to its polar moment of inertia.
Reason (R): In a composite shaft having concentric shafts of different materials, the angle of twist for each shaft depends upon its polar moment of inertia.
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
Dharmendra Singh asked • 7 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
Obi Lesh asked • 7 hours agoIf two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.- a)Agree
- b)Disagree
Correct answer is option 'A'. Can you explain this answer?
If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.
a)
Agree
b)
Disagree
REKHA KUMARI asked • 8 hours agoTorsion bars are in series- a)if same torque acts in each
- b)if they have equal angles of twist and an applied torque apportioned between them
- c)if same shear stress gets developed in each
- d)if they have same torsional rigidity
Correct answer is option 'B'. Can you explain this answer?
Torsion bars are in series
a)
if same torque acts in each
b)
if they have equal angles of twist and an applied torque apportioned between them
c)
if same shear stress gets developed in each
d)
if they have same torsional rigidity
Sanjay Rewad asked • 8 hours agoThe coating material of an arc welding electrode contains which of the following? 1. Deoxidising agent 2. Arc stabilizing agent 3. Slag forming agentSelect the correct answer using the code given below: - a)1, 2 and 3
- b)1 and 2 only
- c)2 and 3 only
- d)1 and 3 only
Correct answer is option 'A'. Can you explain this answer?
The coating material of an arc welding electrode contains which of the following?
1. Deoxidising agent
2. Arc stabilizing agent
3. Slag forming agent
Select the correct answer using the code given below:
a)
1, 2 and 3
b)
1 and 2 only
c)
2 and 3 only
d)
1 and 3 only
Ashish Goyal asked • 8 hours agoThe direction of Corioli's component of acceleration is the direction- a)of relative velocity vector for the two coincident points rotated by 90º in the direction of the angular velocity of the rotation of the link.
- b)along the centripetal acceleration
- c)along tangential acceleration
- d)along perpendicular to angular velocity
- e)none of the above
Correct answer is option 'A'. Can you explain this answer?
The direction of Corioli's component of acceleration is the direction
a)
of relative velocity vector for the two coincident points rotated by 90º in the direction of the angular velocity of the rotation of the link.
b)
along the centripetal acceleration
c)
along tangential acceleration
d)
along perpendicular to angular velocity
e)
none of the above
Hardik Barot asked • 8 hours agoIf angle of contact of a drop of liquid is acute then- a)adhesion is more than cohesion
- b)cohesion is more than adhesion
- c)cohesion is equal to adhesion
- d)adhesion and cohesion have no bearing with angle of contact
Correct answer is option 'A'. Can you explain this answer?
If angle of contact of a drop of liquid is acute then
a)
adhesion is more than cohesion
b)
cohesion is more than adhesion
c)
cohesion is equal to adhesion
d)
adhesion and cohesion have no bearing with angle of contact
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