Recent questions and answers in Mechanical Engineering

1 answer 12 views

If a shaft made of ductile material is subjected to combined bending and twisting moments, calculation based on which one of the following theories would give the most conservative values ? (A) Maximum principle stress theory (B) Maximum shear stress theory (C) Maximum strain energy theory (D) Maximum distortion energy theory

answered Jun 17, 2018 in Mechanical Engineering
1 answer 17 views

Two metallic blocks having masses in the ratio 2:3 are made to slide down a frictionless inclined plane starting from rest position. When the blocks reach the bottom of the inclined plane, they will have their kinetic energies in the ratio : (A) 2:3 (B) 3:5 (C) 3:2 (D) 7:4

answered Jun 17, 2018 in Mechanical Engineering
1 answer 12 views

The train value of a gear train is : (A) equal to velocity ratio (B) reciprocal of velocity ratio (C) always greater than unity (D) none of the above

answered Jun 17, 2018 in Mechanical Engineering
1 answer 54 views

 In a clock mechanism, the gear train used to connect minute hand to hour hand, is : (A) Epicyclic gear train (B) Reverted gear train (C) Compound gear train (D) Simple gear train

answered Jun 17, 2018 in Mechanical Engineering
1 answer 23 views

If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then the energy stored in the latter at the same speed will be : (A) Four times the first one (B) Same at the first one (C) One fourth of the first one (D) One and half times the first one

answered Jun 17, 2018 in Mechanical Engineering
1 answer 30 views

Material having highest cutting speed is : (A) Cast iron (B) Bronze (C) Aluminium (D) High carbon steel

answered Jun 17, 2018 in Mechanical Engineering
1 answer 11 views

Angle between the shear plane and work surface is known as : (A) lip angle (B) rake angle (C) cutting angle (D) shear angle

answered Jun 17, 2018 in Mechanical Engineering
1 answer 8 views

Binding material used in cemented carbide tools is : (A) Nickel (B) Cobalt (C) Chromium (D) Silicon

answered Jun 17, 2018 in Mechanical Engineering
1 answer 50 views

The usual ratio of forward and return stroke in shaper is : (A) 2:1 (B) 1:2 (C) 2:3 (D) 3:2

answered Jun 17, 2018 in Mechanical Engineering
1 answer 8 views

Tool life is most affected by : (A) cutting speed (B) tool geometry (C) feed and depth (D) microstructure of material being cut

answered Jun 17, 2018 in Mechanical Engineering
1 answer 17 views

The main object of scientific layout is : (A) to produce better quality of product (B) to utilise maximum floor area (C) to minimise production delays (D) all of these

answered Jun 17, 2018 in Mechanical Engineering
1 answer 14 views

In value engineering, the term value refers to : (A) manufacturing cost of the product (B) selling price of the product (C) total cost of the product (D) utility of the product

answered Jun 17, 2018 in Mechanical Engineering
1 answer 42 views

 In axial flow fans and turbines, fluid enters and leaves as follows : (A) radially, axially (B) axially, radially (C) axially, axially (D) radially, radially

answered Jun 17, 2018 in Mechanical Engineering
1 answer 31 views

Which of the following instrument can be used for measuring speed of an aeroplane ? (A) orifice plate (B) hot wire anemometer (C) rotameter (D) pitot tube

answered Jun 17, 2018 in Mechanical Engineering
1 answer 8 views

 A twist drill is a : (A) side cutting tool (B) front cutting tool (C) end cutting tool (D) none of these

answered Jun 17, 2018 in Mechanical Engineering
1 answer 17 views

In inventory control theory, the economic order quantity is : (A) average level of inventory (B) optimum lot size (C) capacity of a warehouse (D) lost size corresponding to break-even analysis

answered Jun 17, 2018 in Mechanical Engineering
1 answer 17 views

Production cost refers to prime cost plus : (A) factory overheads (B) factory and administration overheads (C) factory, administration and sales overheads (D) factory, administration, sales overheads and profit

answered Jun 17, 2018 in Mechanical Engineering
1 answer 13 views

Power transmitted through a pipe is maximum when the loss of head due to friction is : (A) one-half of the total head supplied (B) one-third of the total head supplied (C) one-fourth of the total head supplied (D) zero

answered Jun 17, 2018 in Mechanical Engineering
1 answer 8 views

The efficiency of a centrifugal pump is maximum when its blades are : (A) straight (B) bent forward (C) bent backward (D) bent forward first and then backward

answered Jun 17, 2018 in Mechanical Engineering
1 answer 8 views

The comfort conditions in air conditioning are : (A) 22 ºC dry bulb temperature and 60% relative humidity (B) 25 ºC dry bulb temperature and 100% relative humidity (C) 20º C dry bulb temperature and 75% relative humidity (D) 15º C bulb temperature and 80% relative humidity

answered Jun 17, 2018 in Mechanical Engineering
1 answer 8 views

Air is normally dehumidified by : (A) injecting water (B) passing steam (C) heating (D) cooling

answered Jun 17, 2018 in Mechanical Engineering
1 answer 12 views

Dew point temperature is constant as long as there is : (A) no change in moisture content of the air (B) no change in volume of air (C) no change in dry bulb and wet bulb temperature (D) no change in relative and specific humidity of air

answered Jun 17, 2018 in Mechanical Engineering
1 answer 13 views

The most suitable refrigerant for a commercial ice plant is : (A) brine (B) NH3 (C) Freon (D) air

answered Jun 17, 2018 in Mechanical Engineering
1 answer 10 views

Gantt chart is used for : (A) inventory control (B) material handling (C) production schedule (D) machine repair schedules

answered Jun 17, 2018 in Mechanical Engineering
1 answer 13 views

The ratio of maximum displacement of the forced vibration to the deflection due to static force is known as : (A) Damping Factor (B) Damping Coefficient (C) Logarithmic Decrement (D) Magnification Factor

answered Jun 17, 2018 in Mechanical Engineering
1 answer 15 views

A fluid in equilibrium cannot sustain : (A) tensile stress (B) compressive stress (C) shear stress (D) bending stress

answered Jun 17, 2018 in Mechanical Engineering
1 answer 16 views

A systematic job improvement sequence will consist of : (A) motion study (B) time study (C) job enrichment (D) all of these

answered Jun 17, 2018 in Mechanical Engineering
1 answer 13 views

Euler’s dimensionless number relates the following : (A) Inertial force and gravity (B) Viscous force and Inertial force (C) Pressure force and Inertial force (D) Pressure force and viscous force

answered Jun 15, 2018 in Mechanical Engineering
1 answer 17 views

Military type of organisation is known as : (A) line organisation (B) functional organisation (C) line and staff organisation (D) line, staff and functional organisation 

answered Jun 15, 2018 in Mechanical Engineering
1 answer 10 views

A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as 1. Shift 2. Sand wash 3. Swell 4. Scab

answered May 17, 2018 in Mechanical Engineering
1 answer 18 views

The property of sand due to which the sand grains stick together, is called 1. Collapsibility 2. Permeability 3. Cohesiveness 4. Adhesiveness

answered May 17, 2018 in Mechanical Engineering
1 answer 12 views

In die casting, machining allowance is 1. Small 2. Large 3. Very large 4. Not provided

answered May 17, 2018 in Mechanical Engineering
1 answer 16 views

The mode of deformation of the metal during spinning is 1.Bending 2.Stretching 3.Bending and stretching 4.Rolling and stretching

answered May 17, 2018 in Mechanical Engineering
1 answer 15 views

Structural sections such as rails, angles, I-beams are made by 1. Hot rolling 2. Hot drawing 3. Hot piercing 4. Hot extrusion

answered May 17, 2018 in Mechanical Engineering
1 answer 12 views

The process extensively used for making bolts and nuts is 1. Hot piercing 2. Extrusion 3. Cold peening 4. Cold heading

answered May 17, 2018 in Mechanical Engineering
1 answer 8 views

The cold chisels are made by 1. Drawing 2. Rolling 3. Forging 4. Piercing

answered May 17, 2018 in Mechanical Engineering
1 answer 5 views

Welding of glass is done by 1. Ultrasonic welding 2. Electron beam welding 3. Laser beam welding 4. Explosive welding

answered May 17, 2018 in Mechanical Engineering
1 answer 5 views

Linde welding uses 1.Neutral flame and rightward technique 2.Carburizing flame and rightward technique 3.Neutral flame and leftward technique 4.Oxidizing flame and leftward technique

answered May 17, 2018 in Mechanical Engineering
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