The chemical formula for Freon-12 is
A.CHCIF2
B.CH3CL
C.CCI2F2
D.CCIF3
E.CCIF2CF3
Category: Mechanical Engineering Mcqs
In Red wood viscometer
A.Absolute value of viscosity is determined
B.Part of the head of fluid is utilised in overcoming friction
C.The fluid discharges through orifice with negligible velocity
D.The fluid should rapidly flow out of the orifice
E.Comparison of viscosity is done
By the usual gravity analysis as per B.I.S., the permissible tensile stresses at the upstream face of the dam under earthquake loading, should not exceed
A.50 kg/ cm2
B.100 kg/ cm2
C.150 kg/ cm2
D.200 kg/ cm2
E.Zero
Highest melting point metal is
A.Tungsten
B.Nickel
C.Steel
D.cast iron
In an impulse turbine
A.Water must be admitted over the whole circumference
B.It is not possible to regulate the flow without loss
C.Wheel must run full and kept entirely submerged in water below the tailrace
D.The pressure in the driving fluid as it moves over the vanes is atmospheric
E.None of the above
A public sector undertaking
A.Is fully owned by public through shareholders
B.Is jointly owned by private parties
C.Is jointly owned by private partics and Government
D.Is fully owned by Government
E.None of the above
A back pressure generally operates on pressures in the range
A.15 – 40 kg/cm2
B.50 – 100 kg/cm2
C.100 – 150 kg/cm2
D.150 – 200 kg/cm2
E.200 – 350 kg/cm2
A V belt designated as C 3048/120 will have
A.Approximately 120 inch inside length
B.Approximately 120 cm inside length
C.C section, length unspecified
D.Width 120 mm
E.None of the above
In a Diesel engine, during combustion the pressure may increase at a range of
A.10-15 atm
B.15-20 atm
C.20-30 atm
D.55-75 atm
E.Depends on engine size and speed
Which of the following shovel excavator has got the shortest cycle time?
A.Dipper shovel
B.Backhoe
C.Drag line
D.Clam shell
