Air required for complete combustion of 1 kg of carbon is 11.6 kg. If a fuel contains 88.6% Carbon and 11.4% Hydrogen, the air requirement will
A.Remain unaltered
B.Will decrease
C.Will increase
Category: Mechanical Engineering Mcqs
Air injection in case of S.I. engine refers to injection of
A.Air only
B.Air and fuel mixture
C.Liquid fuel only
D.Super charging
E.Doesn’t exist
The sprue pin/sprue hole used for sand moulds is
A.Tapered upwards
B.Tapered downwards
C.Has no taper at all
In a surface condenser near to the air pump suction the vacuum is 500 mm of mercury with 730 mm of mercury height in a barometer. The pressure near the air pump suction would be
A.1230 mm Hg
B.0.69 kg/sq-cm
C.0.687 kg/sq-cm
D.0.313 kg/sq-cm
E.1.213 kg/sq-cm
A starter in automobile is generally
A.Single phase a.c.motor
B.dc shunt motor
C.dc series motor
D.dc compound motor
E.None of the above
In order to minimise jerks, the type of cam used is
A.Cycloidal
B.S.H.M.
C.Parabolic
D.Cylindrical
E.Hyperbolic
For an ideal gas the value of Joule Kelvin coefficient is
A.Zero
B.0.5
C.Unity
D.Infinite
E.Negative
The advantage of mass production is
A.better quality
B.use of new technology
C.sophistication
D.reduced cost of production
Micro-motion study is
A.Analysis of man-work method by using a motion-picture camera with a timing device in the field of view
B.Motion study observed on enhanced time intervals
C.Motion study of a sequence of operations conducted in parts
D.A study of man and machine conducted separately
E.A scientific analytical procedure for determining a preferable work method
The Reyonlds number may be defined as the ratio of
A.Viscous forces to inertial forces
B.Elastic forces to pressure forces
C.Viscous forces to gravity forces
D.Gravity forces to inertial forces
E.None of the above
