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Recent questions and answers in Mechanical Engineering

Air is normally dehumidified by : (A) injecting water (B) passing steam (C) heating (D) cooling
Last Answer : 1...

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

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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
Last Answer : 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 : 2:3...

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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
Last Answer : The train value of a gear train is : reciprocal of velocity ratio...

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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 : ... at the first one (C) One fourth of the first one (D) One and half times the first one
Last Answer : 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 : One fourth of the first one...

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

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

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

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

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

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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
Last Answer : 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...

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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
Last Answer : In value engineering, the term value refers to : utility of the product...

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

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

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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
Last Answer : In inventory control theory, the economic order quantity is : optimum lot size  ...

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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
Last Answer : Production cost refers to prime cost plus : factory overheads...

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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
Last Answer : Power transmitted through a pipe is maximum when the loss of head due to friction is : one-third of the total head supplied  ...

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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
Last Answer : The efficiency of a centrifugal pump is maximum when its blades are : bent backward...

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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
Last Answer : The comfort conditions in air conditioning are : 22 ºC dry bulb temperature and 60% relative humidity  ...

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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
Last Answer : Dew point temperature is constant as long as there is : no change in moisture content of the air...

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