Which of the following device can be used to measure temperatures of hot bodies radiating energy in visible spectrum
A.Thermopile
B.Piezometer
C.Bolometer
D.Optical pigometer
E.Planimeter
Category: Mechanical Engineering Mcqs
A frictionless heat engine can be 100% efficient only if its exhaust temperature is
A.Equal to its input temperature
B.Less than its input temperature
C.0?C
D.0?K
E.?100?C
In Kando system for electric locomotion
A.dc supply is used to run series motors
B.single phase supply is converted into three phase system
C.three phase ac is converted into dc
D.single phase ac is converted into dc
For an organisation those costs which do not, increase as output increases, are known as
A.Fixed costs
B.Variable costs
C.Total costs
D.Average fixed costs
E.Average total costs
Which of the following material has the lowest weight/volume ratio?
A.Wheat
B.Oats
C.Lignite
D.Charcoal
Which of the following statement about gates is incorrect?
A.he size of gate depends upon the rate of solidification
B.A small gate is used for castings which solidify rapidly
C.More than one gate may be used to feed a fast freezing casting
D.A gate should not have sharp edges
When all the forces acting on a body lie in one plane and their lines of action meet at one point, the forces
A.constitute a couple
B.constitute a moment
C.are known as non-coplaner forces
D.are known as coplaner-concurrent forces.
Which of the following is easiest to bend?
A.Cast iron
B.Grey pig iron
C.Mottled pig iron
D.Steel
E.Wrought iron
The longitudinal strain for a specimen is 0.01 and it is found to undergo 1 mm change in its thickness. The thickness of the specimen will be
A.10 mm
B.100 mm
C.1000 mm
D.400 mm
E.None of the above
In compression ignition engines swirl is
A.Circular motion imparted to gases after combustion
B.Circular motion imparted to suction air
C.Radial motion imparted to fuel air mixture
D.Directional movement of fuel spray
E.None of the above
