A stone is thrown up from the foot of tower 50 m high with a velocity of 25 m/sec and at the same time another stone is dropped from the top of tower, the two stones will cross each other after
A.2 sec
B.3 sec
C.4 sec
D.4.5 sec
E.5 sec
Category: Mechanical Engineering Mcqs
The rate of radiant energy, which is emitted by a surface at any temperature and in small wavelengths is found from the known rate of energy, which under the same conditions would be emitted from a black surface, by multiplying with the absorptivity. Above enunciation is known as
A.Planck’s law
B.Kirchhoff’s law
C.Stefan Bolzmann’s law
D.Lambart’s rule
E.None of the above
The condenser in ignition circuit of an S.I. engine
A.increases the battery voltage
B.decreases the current from battery
C.avoids arcing at contact breaker
D.none of the above
For the soldering of galvanized iron the flux used is
A.Hydrochloric acid
B.Zinc oxide
C.Muriatic acid
D.Ammonium chloride
E.None of the above
If screw threads are to be used in a situation involving high stresses in one direction only, the types of threads suitable for this would be
A.BSW
B.BA
C.Square
D.Acme
E.Buttress
If the sun becomes twice as hot
A.its output of radiation energy will fall
B.it will disintegrate into fragments
C.it will radiate predominantly in infra-red
D.it will radiate predominantly ultraviolet
A constant volume combustion gas turbine operates on
A.Ericsson cycle
B.Brayton cycle
C.Joule cycle
D.Atkinson cycle
The performance of an evaporative condenser largely depends on
A.Dry bulb temperature
B.Wet bulb temperature
C.Hot water temperature
D.Ambient temperature
E.Air conditioned room temperature
The moment of inertia of a body does not depend upon
A.The angular velocity of the body
B.Mass of the body
C.The distribution of mass in the body
D.The axis of rotation of the body
E.None of the above
