The maximum pressure generated by the fuel injection pump does not reach the nozzle end immediately. The lag is due to
A.friction in the oil column
B.pressure wave in the oil column
C.turbulence in the cylinder
D.none of the above
Category: Mechanical Engineering Mcqs
Various activities of project are shown on a bar chart by
A.Vertical line
B.Horizontal lines
C.Area of columns
D.Dotted lines
E.Cross marks
If the life of high speed steel tools is taken as 100% the life of cemented carbide tools will be
A.30 to 50 percent
B.50 to 20 percent
C.80 to 130 percent
D.100 to 150 percent
E.300 to 1000 percent
The audible spectrum of sound is in the range of
A.0 to 100 cps
B.30 to 15000 cps
C.15000 to 25000 cps
D.25000 to 10000 cps
If the structure of a sample consists of pearlite, cementite and free carbon, the sample may be
A.Cast iron
B.Alloy steel
C.Dead mild steel
D.Eutectoid steel
E.None of the above
The advanctage of stratified charge engine is
A.better part load efficiency
B.resistance to knocking tendency
C.better volumetric efficiency
D.All of the above
Ignition coil is used to
A.Step up current
B.Step down current
C.Step up voltage
D.Step up power
E.Step down voltage
Molybdenum upto 1.5% is added to cast iron to
A.improve strength
B.reduce wear resistance
C.increase machinability
D.all of the above
In case of malleable iron castings, the contraction allowance on pattern
A.increass as the section thickness of casting increases
B.decreases as the section thickness of casting increases
C.is independent of section thickness
