For minimum work in multistage compression, the work done on
A.First stage should be least
B.Last stage should be least
C.All stage should be equal
D.There is no such consideration
E.None of the above
Category: Mechanical Engineering Mcqs
Creep is expressed in terms of
A.kg/cm
B.kg/cm2
C.cm/cm
D.cm/cm/hr
E.cm/cm2/hr
Out of the following diesel engine the minimum air consumption per B.H.P. will be in
A.4 stroke, mech, injection
B.4 stroke, air injection
C.2 stroke, mech, injection, pump, scavenging
D.2 stroke, air injection
A four stroke petrol engine is designed to develop 35 BHP at 200 RPM. It has an indicated mean effective pressure of 20 kg/cm2, a stroke of 35 cm and a bore diameter of 20 cm. Using this data mechanical efficiency of the engine at the running condition given would be closest to
A.50 percent
B.60 percent
C.70 percent
D.80 percent
Which of the following symptoms will not show that the combustion is necessarily complete or not?
A.Presence of free carbon in exhaust
B.Presence of carbon monoxide in the exhaust
C.Presence of oxygen is the exhaust
D.Presence of nitrogen in the exhaust
E.None of the above
When a rectangular beam is loaded longitudinally, shear stress develops on
A.Vertical planes only
B.Every fibre
C.Top fibre
D.Bottom fibre
E.Middle fibre
Cores are used
A.In symmetrical casting only
B.To make castings sound
C.To get smooth surface on castings
D.To get cavity or recess in a casting
E.To strengthen mould
Time study is
A.The appraisal, in terms of time, of the value of work involving human effort
B.Time taken by a operator to set the job in a machine
C.The study of time that a group of workers will take to do a job
D.The method of fixing hours for workers
E.Method of determing the number of Supervisors needed in a workshop
The Miller indices of the diagonal plane of a cube are
A.110
B.111
C.100
D.0
E.10
The maximum efficiency of a screw jack provided with square threads and angle of friction 30? will be
A.25%
B.33%
C.47.50%
D.50%
E.60%
