A pressure vessel is said to be thin walled when the ratio of internal diameter of the vessel and wall thickness is
A.5
B.10
C.15
D.More than 20
E.There is no such relationship
Category: Mechanical Engineering Mcqs
If a spark plug does not fire, the probable cause could be
A.Cracked porcelain
B.Carbonized porcelain
C.Moisture or dirt accumulation on porcelain
D.Weak ignition coil
E.Any of the above
Antifreeze chemicals are
A.Same as refrigerants
B.Those which are added to refrigerants for better performance
C.Those which lower down the freezing points of liquids
D.Those which do not freeze at all
E.Always in liquid state even at low temperatures
Odometer is used to measure
A.Threshold odours
B.Composition of gases
C.Suspended solids in a gas
D.Distances
E.Velocities and accelerations
The use of CPM lies in
A.taking corrective measures
B.scheduling and controlling the project
C.planning and controlling the most logical sequence of operations
D.None of the above
Along the principal plane subjected to maximum principal shear
A.The maximum shear stress acts
B.The minimum shear stress acts
C.No shear stress acts
D.Any of the above
E.None of the above
For steam engine having a throttle governor, a straight line is obtained when the total weight of steam used per hour is plotted against the indicated horse power. This line is known as
A.Clapeyron’s line
B.Calender’s line
C.Willian’s line
D.Hopson’s line
E.Bunsen line
In spark ignition engines the knocking tendency decreases
A.As compression ratio is reduced
B.By controlling air/fuel mixture
C.By controlling ignition timing
D.By controlling exhaust temperatures
E.None of the above
The drawback with metallic pattern is
A.excessive weight
B.expensive
C.difficult to shape
D.all of the above
A vibrometer
A.Indicates vibration amplitude
B.Indicates vibration frequency
C.Indicates nature of vibrations
D.Only indicates second and above harmonics
E.Indicates wave from vibrations
