Which organisms cause infections diseases?
A.Viruses
B.Worms
C.Protozoa
D.Fungi
E.All of the above
Category: Mechanical Engineering Mcqs
The objective of an organizational hygiene program is
A.To prevent accidents
B.To make the workplace risk free
C.To supply emergency medical service to workers and their families
D.To prevent occupational diseases
Diesel fuel in a cylinder of CL engine will ignite when temperature of compressed air is
A.1000?C
B.1200?C
C.1500?C
D.2000?C
Steel balls for ball bearings are manufactured by
A.Turning
B.Casting
C.Rolling
D.Cold heading
E.Pressing
Which of the following factor has the least effect on the electrical conductivity of wires made of copper alloy?
A.Method of forming the wire
B.Temperature
C.Alloying element
D.Intensity of any incident light
If a water cooled compressor knocks during operation, the probable cause cannot be
A.Loose flywheel or pulley
B.Too much clearance in crank pin
C.Loose valve
D.Excess cooling in intercooler
E.Air filter choked
In a system if base load is same as maximum demand, the load factor will be
A.1
B.Zero
C.Infinity
D.1 percent
E.0.5 percent
Approximate horse power that can be transmitted by a shaft 60 mm diameter at 180 r.p.m. with permissible shear stress of 850 kg/cm2, would be
A.30-35
B.35-50
C.50-65
D.65-85
E.85-95
The process of production of articles having a soft ductile interior and a very hard surface, is known as
A.Hardening
B.Hardening and tempering
C.Case hardening
D.Hardening and annealing
E.None of the above
The external work donw is zero all the following cases EXCEPT:
A.Isothermal
B.Constant volume
C.Free expansiton
D.Throttling
