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.Management Sciences
Category: Mechanical Engineering Mcqs
Maximum impulse will be developed in hydraulic ram when ___________________?
A. waste valve closes suddenly
B. supply pipe is long
C. supply pipe is short
D. ram chamber is large
E. supply pipe has critical diameter
For combustion of a fuel, following is essential_____________________?
A. correct fuel air ratio
B. proper ignition temperature
C. 02 to support combustion
D. all the three above
E. none of the above
Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in_________________?
A. tension
B. compression
C. bearing
D. any one of the above
E. none of the above
The three “Ts” for good combustion are____________________?
A. temperature, time, and turbulance
B. total air, true fuel, and turbulance
C. thorough mixing, total air, and temperature
D. total air, time, and temperature
E. none of the above
The two important forces for a floating body are__________________?
A. buoyancy, gravity
B. buoyancy, pressure
C. buoyancy, inertial
D. inertial, gravity
E. gravity, pressure
Oldham’s coupling is the ____________________?
A. second inversion of double slider crank chain
B. third inversion of double slider crank chain
C. second inversion of single slider crank chain
D. third inversion of slider crank chain
E. fourth inversion of double slider crank chain
The unit of power in S.I. units is______________?
A. newton meter
B. watt
C. joule
D. kilogram meter/sec
E. pascal per sec
Half life of a radioactive isotope corresponds to the time required for half of the following to decay__________________?
A. electrons
B. protons
C. neutrons
D. nulceus
E. atom
Which is not the correct statement about moisture in coal ______________________?
A. inherent moisture and surface mois¬ture are different things
B. in some coals moisture may be present upto 40%
C. some moisture in coal helps in better burning which is not possible with completely dry coal
D. it increases thermal efficiency
E. moisture in coal is removed before firing by heating it with hot air
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is___________________?
A. more
B. less
C. same
D. could be more or less depending on other factors
E. none of the above
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