Mechanical Engineering
Two wires of different materials but of same diameter are connected end to end and a force is applied which stretches them by 1 cm. The two wires will have the- a)same stress and strain
- b)same stress and different strain
- c)same strain but different stresses
- d)different stresses and strains
Correct answer is option 'B'. Can you explain this answer?
Two wires of different materials but of same diameter are connected end to end and a force is applied which stretches them by 1 cm. The two wires will have the
a)
same stress and strain
b)
same stress and different strain
c)
same strain but different stresses
d)
different stresses and strains
Himansu Joshi answered • 1 hour ago
Load and area remains same for both cases, so stresses are same.
Stress = E x strain
E is different for both materials, so strains are different.
Which one of the following is correct relation between (COP)HP and (COP)R- a)(COP)HP-(COP)R - 1
- b)(COP)R - (COP)HP = 1
- c)(COP)Hp + (COP)R = 1
- d)(COP)HP + (COP)H = 0
Correct answer is option 'A'. Can you explain this answer?
Which one of the following is correct relation between (COP)HP and (COP)R
a)
(COP)HP-(COP)R - 1
b)
(COP)R - (COP)HP = 1
c)
(COP)Hp + (COP)R = 1
d)
(COP)HP + (COP)H = 0
Bupender Singh answered • 1 hour agoRelation between coefficient of performance of heat pump and refrigerator:
the norm of the vector can be defined as 
Given a function 
its gradient 
is
The earth receive at its surface radiation from the sun at the rate of 1400 W/m2. The distance of the centre of sun from the surface of earth is 1.5 x 1011 m and the radius of the sun is 7 x 108 m. Treating the sun as black body, it follows from the above data that sun's surface temperature is about- a)3650 K
- b)4520 K
- c)5800 K
- d)6150 K[
Correct answer is option 'C'. Can you explain this answer?
The earth receive at its surface radiation from the sun at the rate of 1400 W/m2. The distance of the centre of sun from the surface of earth is 1.5 x 1011 m and the radius of the sun is 7 x 108 m. Treating the sun as black body, it follows from the above data that sun's surface temperature is about
a)
3650 K
b)
4520 K
c)
5800 K
d)
6150 K[
Manish Bisht answered • 1 hour ago
where L is mean distance between sun and earth,
r is radius of the sun
Gs is solar constant and equal to 1400 W/m2
σ is Stefan-Boltzman constan
One tonnes of refrigeration is equal to- a)210 kJ/min
- b)3.5 kJ/min
- c)105 kJ/min
- d)250 kJ/min
Correct answer is option 'A'. Can you explain this answer?
One tonnes of refrigeration is equal to
a)
210 kJ/min
b)
3.5 kJ/min
c)
105 kJ/min
d)
250 kJ/min
Surender Madwal answered • 1 hour ago1 T.R. - 3.5 kW = 210 kJ/min
For filmwise condensation on a vertical plane; the film thickness 5 and heat transfer coefficient h vary with distance* from the leading edge as- a)δ decreases, h increases
- b)both δ and h increases
- c)δ increases, h decreases
- d)both δ and h decreas
Correct answer is option 'C'. Can you explain this answer?
For filmwise condensation on a vertical plane; the film thickness 5 and heat transfer coefficient h vary with distance* from the leading edge as
a)
δ decreases, h increases
b)
both δ and h increases
c)
δ increases, h decreases
d)
both δ and h decreas
Govind Sonial answered • 1 hour ago
The locus of instantaneous center of a moving body relative to a fixed body is known as the- a)space centrode
- b)bodycentrode
- c)moving centrode
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
The locus of instantaneous center of a moving body relative to a fixed body is known as the
a)
space centrode
b)
bodycentrode
c)
moving centrode
d)
none of these
Yogesh Kumaya answered • 1 hour agoA centrode is the locus of the I-center of a plane body relative to another plane body for the range of motion specified or during a finite period of time.
Space centrode (or fixed centrode) is the locus of the I-center of the moving body relative to the fixed body.
Body centrode (or moving centrode) is the locus of the I-center of the fixed body relative to the movable body.
Space centrode (or fixed centrode) is the locus of the I-center of the moving body relative to the fixed body.
Body centrode (or moving centrode) is the locus of the I-center of the fixed body relative to the movable body.
Consider the following statements performing to emission norms;
1. Strictest emission norms are initiated in the world first in the state of California of U.S.A.
2. No emission norms/ standards apply to seaaoina ships or airplanes.
3. Bharat stage Ml emission norms is applicable in India for 4-wheelers since 2008.
4. BS-IV (equivalent to Euro IV) is applicable in india for 11 major citiesWhich of the above statements are true?- a)1,2 and 3
- b)1,2 and 4
- c)2, 3 and
- d)1,3 and’4
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements performing to emission norms;
1. Strictest emission norms are initiated in the world first in the state of California of U.S.A.
2. No emission norms/ standards apply to seaaoina ships or airplanes.
3. Bharat stage Ml emission norms is applicable in India for 4-wheelers since 2008.
4. BS-IV (equivalent to Euro IV) is applicable in india for 11 major cities
1. Strictest emission norms are initiated in the world first in the state of California of U.S.A.
2. No emission norms/ standards apply to seaaoina ships or airplanes.
3. Bharat stage Ml emission norms is applicable in India for 4-wheelers since 2008.
4. BS-IV (equivalent to Euro IV) is applicable in india for 11 major cities
Which of the above statements are true?
a)
1,2 and 3
b)
1,2 and 4
c)
2, 3 and
d)
1,3 and’4
Sunder Jaitwal answered • 1 hour agoStatement (3) is wrong. BS-ili norms is applicable since 2010.
Abhishek Govil asked • 46 minutes 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
The purpose of balance weight in crankshaft is to- a)balance the rotating system
- b)time the valve train
- c)improve the net torque
- d)control the mean speed
Correct answer is option 'A'. Can you explain this answer?
The purpose of balance weight in crankshaft is to
a)
balance the rotating system
b)
time the valve train
c)
improve the net torque
d)
control the mean speed
Sunil Ram answered • 1 hour agoThe balance weights are provided for static and dynamic balancing of the rotating system.
Which one of the following portions of the loaded beam shown in the given figure is subjected to pure bending?
- a)AB
- b)DE
- c)AE
- d)BD
Correct answer is option 'D'. Can you explain this answer?
Which one of the following portions of the loaded beam shown in the given figure is subjected to pure bending?
a)
AB
b)
DE
c)
AE
d)
BD
Harish Lal answered • 1 hour agoSince the given beam is loaded symmetrically, therefore the reactions at each suportwill be equal i.e. W
In section BD, shear force is zero. Hence this section subjected to pure bending.
In section BD, shear force is zero. Hence this section subjected to pure bending.
Achuth Kumar Yelleti asked • 1 hour agoA beam having uniform cross-section carries a uniformly distributed load of intensity q per unit length over its entire span, and its mid-span deflection is δ.The value of mid-span deflection of the same beam when the same load is distributed with intensity varying from 2q unit length at one end to zero at the other end is:- a)1/3 δ
- b)1/2 δ
- c)2/3 δ
- d)δ
Correct answer is option 'D'. Can you explain this answer?
A beam having uniform cross-section carries a uniformly distributed load of intensity q per unit length over its entire span, and its mid-span deflection is δ.
The value of mid-span deflection of the same beam when the same load is distributed with intensity varying from 2q unit length at one end to zero at the other end is:
a)
1/3 δ
b)
1/2 δ
c)
2/3 δ
d)
δ
Dynamic similarity between model and prototype implies that- a)the forces acting at corresponding locations are same
- b)the flow pattern is similar
- c)there is point to point correspondence between the two systems
- d)both the systems undergo similar rates of change of motion
Correct answer is option 'A'. Can you explain this answer?
Dynamic similarity between model and prototype implies that
a)
the forces acting at corresponding locations are same
b)
the flow pattern is similar
c)
there is point to point correspondence between the two systems
d)
both the systems undergo similar rates of change of motion
Karan Kumar answered • 14 hours agoTwo systems are dynamically similar , if geometric and kinematic similarities exist and further the ratios of all corresponding forces in the two systems are the same.
If forces due to
If forces due to
and suffixees m and p stand for model and prototype respectively, strict dynamic similarity means:
A jet pump is located at 3 m above the sump water level and has a head of 13 m applied at the nozzle. If the delivery head is 11 m when the discharge through the pump is 15 L/s and jet discharge is 2.5 L/s, what is the efficiency of jet pump?- a)19%
- b)29%
- c)35%
- d)42%
Correct answer is option 'C'. Can you explain this answer?
A jet pump is located at 3 m above the sump water level and has a head of 13 m applied at the nozzle. If the delivery head is 11 m when the discharge through the pump is 15 L/s and jet discharge is 2.5 L/s, what is the efficiency of jet pump?
a)
19%
b)
29%
c)
35%
d)
42%
Pankaj Tamta answered • 14 hours agoA jet pump is a combination of normal centrifugal pump and a jet device at the suction end, When the pump is started, a part of the water from delivery side of pump is diverted into a nozzle. The efficiency of jet pump is
Bhushana Rao Kona asked • 1 hour agoAccording to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then- a)their algebraic sum is zero
- b)their lines of action are at equal distances
- c)the algebraic sum of their moments about any point in their plane is zero
- d)the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.
Correct answer is option 'C'. Can you explain this answer?
According to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then
a)
their algebraic sum is zero
b)
their lines of action are at equal distances
c)
the algebraic sum of their moments about any point in their plane is zero
d)
the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.
In which one of the following materials, is the heat energy propagation minimum due to conduction heat transfer- a)Lead
- b)Copper
- c)Water
- d)Air
Correct answer is option 'D'. Can you explain this answer?
In which one of the following materials, is the heat energy propagation minimum due to conduction heat transfer
a)
Lead
b)
Copper
c)
Water
d)
Air
Devender Kumar answered • 14 hours agoSince thermal conductivity of air is minimum among the given material hence heat transfer will be minimum in air.
where w0 = specific weight of ocean water at the free surface, then pressure as a function of depth is
The genera! form of expression for the continuity equationin a cartesian co-ordinate system for incompressible or compressible flow is given by- a)
- b)
- c)
- d)
Correct answer is option 'C'. Can you explain this answer?
The genera! form of expression for the continuity equationin a cartesian co-ordinate system for incompressible or compressible flow is given by
a)
b)
c)
d)
DINESH GARG answered • 14 hours agoThe general form of expression for the continuity equation in a Cartesian co-ordinate system
An SI engine sometimes continues to run for a very small period even after the ignition is switched off. This phenomenon is called- a)over burning
- b)pull up period
- c)dieseling
- d)throttle sticking
Correct answer is option 'C'. Can you explain this answer?
An SI engine sometimes continues to run for a very small period even after the ignition is switched off. This phenomenon is called
a)
over burning
b)
pull up period
c)
dieseling
d)
throttle sticking
GAJENDER SINGH answered • 14 hours agoAn Si engine sometimes continues to run for a very small even after the ignition is switched off. It is called as dieseiing. Dieseling may take place due to following:
- High engine idling speed.
- Increase in compression ratio due to carbon deposits.
- Engine overheating.
- Too high spark plug heat range,
- Incorrect adjustment of idle fuel-air mixture.
- Sticking of throttle.
- Requirement of tune up of engine.
- Oil entry into the cylinder.
A beam carrying a uniformly distribute load rests on two supports ‘b’ apart with equal overhangs ‘a’ at each end. The ratio b/a for zero bending moment at midspan is.- a)1/2
- b)1
- c)3/2
- d)2
Correct answer is option 'D'. Can you explain this answer?
a)
1/2
b)
1
c)
3/2
d)
2
SANDEEP SHAH answered • 14 hours ago
(a + b / 2)= b
a = b/2
b/a = 2
Correct option = D
Navier-Stokes equation represents the conservation of- a)energy
- b)momentum
- c)pressure
- d)mass
Correct answer is option 'B'. Can you explain this answer?
Navier-Stokes equation represents the conservation of
a)
energy
b)
momentum
c)
pressure
d)
mass
SANJEEO SHRIVASTAVA answered • 14 hours agoThe Navier-Stokes equations govern the motion of fluids and can be seen as Newton's second law of motion for fluids. ... The Navier-Stokes equations represent the conservation of momentum, while the continuity equation represents the conservation of mass.
under the boundary conditions 
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)
Pranjal Sao asked • 3 hours agoAn electronic equipment manufacturer has decided to add a component sub-assembly operation that can produce 80 units during a regular 8-hour shift. This operation consists of three activities as below:
For line balancing the number of work stations required for the activities M, E and T would respectively be - a)2, 3, 1
- b)3, 2, 1
- c)2, 4, 2
- d)2, 1, 3
Correct answer is option 'A'. Can you explain this answer?
An electronic equipment manufacturer has decided to add a component sub-assembly operation that can produce 80 units during a regular 8-hour shift. This operation consists of three activities as below:
For line balancing the number of work stations required for the activities M, E and T would respectively be
a)
2, 3, 1
b)
3, 2, 1
c)
2, 4, 2
d)
2, 1, 3
Kirankesavareddy Naredla asked • 5 hours agoConsider the following statements for a throttling process:1. It is an adiabatic process.2. There is no work transfer in the process.3. Entropy increases in throttling processWhich of these statements are correct ?- 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?
Consider the following statements for a throttling process:
1. It is an adiabatic process.
2. There is no work transfer in the process.
3. Entropy increases in throttling process
Which of these statements are correct ?
a)
1, 2 and 3
b)
1 and 2 only
c)
2 and 3 only
d)
1 and 3 only
Aadarsh Vikram asked • 7 hours agoThe above figure shows a cam with a circular profile, rotating with a uniform angular velocity of ω rad/s.
What is the nature of displacement of the follower?
- a)Uniform
- b)Parabolic
- c)Simple harmonic
- d)Cycloidal
Correct answer is option 'C'. Can you explain this answer?
The above figure shows a cam with a circular profile, rotating with a uniform angular velocity of ω rad/s.
What is the nature of displacement of the follower?
What is the nature of displacement of the follower?
a)
Uniform
b)
Parabolic
c)
Simple harmonic
d)
Cycloidal
Indian Army asked • 8 hours agoAssertion (A): If a graph is plotted for absolute temperature as a function of entropy, the area under the curve would give the amount of heat supplied.Reason (R): Entropy represents the maximum fraction of work obtainable from heat per degree drop in temperature.- 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 a graph is plotted for absolute temperature as a function of entropy, the area under the curve would give the amount of heat supplied.
Reason (R): Entropy represents the maximum fraction of work obtainable from heat per degree drop in temperature.
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
Vinod Gupta asked • 8 hours agoTo convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is- a)divided by its molecular weight
- b)multiplied by its molecular weight
- c)multiplied by its density
- d)multiplied by its specific weight
- e)divided by its specific weight.
Correct answer is option 'B'. Can you explain this answer?
To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is
a)
divided by its molecular weight
b)
multiplied by its molecular weight
c)
multiplied by its density
d)
multiplied by its specific weight
e)
divided by its specific weight.
Anil Gangwar asked • 8 hours agoNeglecting changes in kinetic energy and potential energy, for unit mass the availability in a non-flow process becomes 
where ɸ is the availability function of the - a)Open system
- b)Closed system
- c)Isolated system
- d)Steady flow process
Correct answer is option 'A'. Can you explain this answer?
Neglecting changes in kinetic energy and potential energy, for unit mass the availability in a non-flow process becomes where ɸ is the availability function of the
where ɸ is the availability function of the a)
Open system
b)
Closed system
c)
Isolated system
d)
Steady flow process
Hardik Barot asked • 9 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
Syam Nutalapati asked • 9 hours agoIn a slider-crank mechanism the maximum acceleration of slider is obtained when the crank is - a)at the inner dead centre position
- b)at the outer dead centre position
- c)exactly midway position between the two dead centers
- d)slightly in advance of the midway position between the two dead centers
Correct answer is option 'B'. Can you explain this answer?
In a slider-crank mechanism the maximum acceleration of slider is obtained when the crank is
a)
at the inner dead centre position
b)
at the outer dead centre position
c)
exactly midway position between the two dead centers
d)
slightly in advance of the midway position between the two dead centers
Chandan Patel 007 asked • 10 hours agoConsider the following Linear Programming Problem (LPP):
Maximize z = 3x1 + 2x2
Subject to x1 ≤ 4
x2 ≤ 6
3x1 + x2 ≤ 18
x2 ≥ 0, x2 ≥ 0 - a)The LPP has a unique optimal solution
- b)The LPP is infeasible
- c)The LPP is unbounded
- d)The LPP has multiple optimal solutions.
Correct answer is option 'A'. Can you explain this answer?
Consider the following Linear Programming Problem (LPP):
Maximize z = 3x1 + 2x2
Subject to x1 ≤ 4
x2 ≤ 6
3x1 + x2 ≤ 18
x2 ≥ 0, x2 ≥ 0
Maximize z = 3x1 + 2x2
Subject to x1 ≤ 4
x2 ≤ 6
3x1 + x2 ≤ 18
x2 ≥ 0, x2 ≥ 0
a)
The LPP has a unique optimal solution
b)
The LPP is infeasible
c)
The LPP is unbounded
d)
The LPP has multiple optimal solutions.
Micky Kumar asked • 10 hours agoA beam with a rectangular section of 120 mm × 60 mm, designed to be placed vertically is placed horizontally by mistake. If the maximum stress is to be limited, the reduction in load carrying capacity would be - a)1/4
- b)1/3
- c)1/2
- d)1/6
Correct answer is option 'C'. Can you explain this answer?
A beam with a rectangular section of 120 mm × 60 mm, designed to be placed vertically is placed horizontally by mistake. If the maximum stress is to be limited, the reduction in load carrying capacity would be
a)
1/4
b)
1/3
c)
1/2
d)
1/6
Bhushana Rao Kona asked • 11 hours agoThe loss of head due to viscosity for laminar flow in pipes iswhere d = Diameter of pipe
l = Length of pipe
v = Velocity of the liquid in the pipe
μ = Viscosity of the liquid and
w = Specific weight of the flowing
liquid- a)
- b)
- c)
- d)
Correct answer is option 'D'. Can you explain this answer?
The loss of head due to viscosity for laminar flow in pipes is
where d = Diameter of pipe
l = Length of pipe
v = Velocity of the liquid in the pipe
μ = Viscosity of the liquid and
w = Specific weight of the flowing
liquid
l = Length of pipe
v = Velocity of the liquid in the pipe
μ = Viscosity of the liquid and
w = Specific weight of the flowing
liquid
a)
b)
c)
d)
Abhishek Govil asked • 11 hours agoLocomotive boiler is a- a)single tube, horizontal, internally fired and stationary boiler
- b)single tube, vertical, externally fired and stationary boiler
- c)multitubular, horizontal, internally fired and mobile boiler
- d)multitubular, horizontal, externally fired and stationary boiler
Correct answer is option 'C'. Can you explain this answer?
Locomotive boiler is a
a)
single tube, horizontal, internally fired and stationary boiler
b)
single tube, vertical, externally fired and stationary boiler
c)
multitubular, horizontal, internally fired and mobile boiler
d)
multitubular, horizontal, externally fired and stationary boiler
Deniyal Patel asked • 11 hours agoX(t) is a real valued function of a real variable with period T. Its trigonometric Fourier Series expansion contains no terms of frequency ω = 2π (2k ) /T ; k = 1, 2,.... Also, no sine terms are present. Then x(t) satisfies the equation - a)x ( t ) =−x(t − T)
- b)x (t) = −x(T − t)= −x (−t)
- c)x (t) = x(T− t) = −x (t −T / 2)
- d)x (t ) = x(t−T) = x (t −T / 2)
Correct answer is option 'D'. Can you explain this answer?
X(t) is a real valued function of a real variable with period T. Its trigonometric Fourier Series expansion contains no terms of frequency ω = 2π (2k ) /T ; k = 1, 2,.... Also, no sine terms are present. Then x(t) satisfies the equation
a)
x ( t ) =−x(t − T)
b)
x (t) = −x(T − t)= −x (−t)
c)
x (t) = x(T− t) = −x (t −T / 2)
d)
x (t ) = x(t−T) = x (t −T / 2)
Kamal Bhardwaj asked • 11 hours agoAssertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.- 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): The degree of hunting with an unstable governor will be less than with an isochronous governor.
Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.
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
Kasireddyganeshreddy Red asked • 13 hours agoCarbonisation of coal is the process of- a)pulverising coal in inert atmosphere
- b)heating wood in a limited supply of air at temperatures below 300ºC
- c)strongly heating coal continuously or about 48 hours in the absence of air in a closed vessel
- d)binding the pulverised coal into bricketters
- e)enriching carbon in the coal
Correct answer is option 'C'. Can you explain this answer?
Carbonisation of coal is the process of
a)
pulverising coal in inert atmosphere
b)
heating wood in a limited supply of air at temperatures below 300ºC
c)
strongly heating coal continuously or about 48 hours in the absence of air in a closed vessel
d)
binding the pulverised coal into bricketters
e)
enriching carbon in the coal
Sidhant Kumar asked • 14 hours agoIn a continuous curve of bending moment, the point of zero bending moment, where it changes sign is called- a)the point of inflextion
- b)the point of contra-flexure
- c)the point of a virtual hinge
- d)all of the above
Correct answer is option 'D'. Can you explain this answer?
In a continuous curve of bending moment, the point of zero bending moment, where it changes sign is called
a)
the point of inflextion
b)
the point of contra-flexure
c)
the point of a virtual hinge
d)
all of the above
Aadarsh Vikram asked • 14 hours agoA thick open ended cylinder as shown in the figure is made of a material with permissible normal and shear stresses 200 MPa and 100 MPa respectively. The ratio of permissible pressure based on the normal and shear stress is:
- a)9/5
- b)8/5
- c)7/5
- d)4/5
Correct answer is option 'B'. Can you explain this answer?
A thick open ended cylinder as shown in the figure is made of a material with permissible normal and shear stresses 200 MPa and 100 MPa respectively. The ratio of permissible pressure based on the normal and shear stress is:
a)
9/5
b)
8/5
c)
7/5
d)
4/5
Gokul Krishnan asked • 15 hours agoConsider the following operations involved in forging a hexagonal bolt from a round bar stock, whose diameter is equal to the bolt diameter:
1. Flattening 2. Upsetting 3. Swaging 4. CamberingQ.The correct sequence of these operations is- a)1, 2, 3, 4
- b)2, 3, 4, 1
- c)2, 1, 3, 4
- d)3, 2, 1, 4
Correct answer is option 'A'. Can you explain this answer?
Consider the following operations involved in forging a hexagonal bolt from a round bar stock, whose diameter is equal to the bolt diameter:
1. Flattening 2. Upsetting 3. Swaging 4. Cambering
1. Flattening 2. Upsetting 3. Swaging 4. Cambering
Q.
The correct sequence of these operations is
a)
1, 2, 3, 4
b)
2, 3, 4, 1
c)
2, 1, 3, 4
d)
3, 2, 1, 4
Pk Patel asked • 15 hours agoWhich one of the following statements is NOT true of rolling contact bearing? - a)The bearing characteristic number is given by ZN/p where Z is the absolute viscosity of the lubricant, N is the shaft speed and p is the bearing pressure.
- b)Inner race of a radial ball bearing has an interference fit with the shaft and rotates along with it
- c)Outer race of the bearing has an interference fit with bearing housing and does not rotate
- d)In some cases, the inner race is stationary and outer race rotates
Correct answer is option 'D'. Can you explain this answer?
Which one of the following statements is NOT true of rolling contact bearing?
a)
The bearing characteristic number is given by ZN/p where Z is the absolute viscosity of the lubricant, N is the shaft speed and p is the bearing pressure.
b)
Inner race of a radial ball bearing has an interference fit with the shaft and rotates along with it
c)
Outer race of the bearing has an interference fit with bearing housing and does not rotate
d)
In some cases, the inner race is stationary and outer race rotates
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