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?

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?

Bupender Singh answered • 1 hour ago

Relation between coefficient of performance of heat pump and refrigerator:

The earth receive at its surface radiation from the sun at the rate of 1400 W/m^{2}. The distance of the centre of sun from the surface of earth is 1.5 x 10^{11} m and the radius of the sun is 7 x 10^{8} 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?

Manish Bisht answered • 1 hour ago

where L is mean distance between sun and earth,

r is radius of the sun

G_{s} is solar constant and equal to 1400 W/m^{2}

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?

Surender Madwal answered • 1 hour ago

1 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?

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?

Yogesh Kumaya answered • 1 hour ago

A 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 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

Correct answer is option 'B'. Can you explain this answer?

Sunder Jaitwal answered • 1 hour ago

Statement (3) is wrong. BS-ili norms is applicable since 2010.

Abhishek Govil asked • 46 minutes ago

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

Correct answer is option 'D'. 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

Correct answer is option 'A'. Can you explain this answer?

Sunil Ram answered • 1 hour ago

The 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?

Harish Lal answered • 1 hour ago

Since 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 ago

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

Correct answer is option 'D'. 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

Correct answer is option 'A'. Can you explain this answer?

Karan Kumar answered • 14 hours ago

Two 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?

Pankaj Tamta answered • 14 hours ago

A 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 ago

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.

Correct answer is option 'C'. 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

Correct answer is option 'D'. Can you explain this answer?

Devender Kumar answered • 14 hours ago

Since thermal conductivity of air is minimum among the given material hence heat transfer will be minimum in air.

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?

DINESH GARG answered • 14 hours ago

The 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?

GAJENDER SINGH answered • 14 hours ago

An 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?

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?

SANJEEO SHRIVASTAVA answered • 14 hours ago

The **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.

Selvakumar Baskar asked • 3 hours ago

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)

Correct answer is option 'B'. Can you explain this answer?

Pranjal Sao asked • 3 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Kirankesavareddy Naredla asked • 5 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Aadarsh Vikram asked • 7 hours ago

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

Correct answer is option 'C'. Can you explain this answer?

Indian Army asked • 8 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

Vinod Gupta asked • 8 hours ago

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.

Correct answer is option 'B'. Can you explain this answer?

Anil Gangwar asked • 8 hours ago

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

- a)Open system
- b)Closed system
- c)Isolated system
- d)Steady flow process

Correct answer is option 'A'. Can you explain this answer?

Hardik Barot asked • 9 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Syam Nutalapati asked • 9 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

Chandan Patel 007 asked • 10 hours ago

Consider the following Linear Programming Problem (LPP):

Maximize z = 3x_{1} + 2x_{2}

Subject to x_{1} ≤ 4

x_{2} ≤ 6

3x_{1} + x_{2} ≤ 18

x_{2} ≥ 0, x_{2} ≥ 0

Maximize z = 3x

Subject to x

x

3x

x

- 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?

Micky Kumar asked • 10 hours ago

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

Correct answer is option 'C'. Can you explain this answer?

Bhushana Rao Kona asked • 11 hours ago

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)

Correct answer is option 'D'. Can you explain this answer?

Abhishek Govil asked • 11 hours ago

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

Correct answer is option 'C'. Can you explain this answer?

Deniyal Patel asked • 11 hours ago

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)

Correct answer is option 'D'. Can you explain this answer?

Kamal Bhardwaj asked • 11 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Kasireddyganeshreddy Red asked • 13 hours ago

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

Correct answer is option 'C'. Can you explain this answer?

Sidhant Kumar asked • 14 hours ago

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

Correct answer is option 'D'. Can you explain this answer?

Aadarsh Vikram asked • 14 hours ago

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

Correct answer is option 'B'. Can you explain this answer?

Gokul Krishnan asked • 15 hours ago

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

Correct answer is option 'A'. Can you explain this answer?

Pk Patel asked • 15 hours ago

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

Correct answer is option 'D'. Can you explain this answer?

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