Lead poisoning occurs when the lead content in water is
A.300 – 500 ppm
B.30 – 50 ppm
C.10 – 15 ppm
D.3 – 5 ppm
E.0.3 – 0.5 ppm
Category: Mechanical Engineering Mcqs
If all the variables of a steam are in-dependent of time it is said to be in
A.Steady flow
B.Unsteady flow
C.Uniform flow
D.Closed flow
E.Constant flow
The minimum change in the measured variable which produces an effective response of the instrument is known as
A.Resolution sensitivity
B.Accuracy
C.Hysteresis
D.Precision
E.Deviation
Machinability of metal depends on
A.Hardness
B.Hardness and tensile strength
C.Brittleness
D.Brittleness and toughness
E.None of the above
The cost of fuel is least in case of
A.Nuclear power plant
B.Steam power plant
C.Diesel engine power plant
D.Gas turbine power plants
E.Hydro-electric power plant
The percentage of carbon in cold rolled steel sheets is around
A.0.01%
B.0.10%
C.0.80%
D.1.10%
E.2.10%
A shaft running at 300 rpm is required to transmit 300 horse power. The working stress in shear is 420 kg/cm2. The diameter of the shaft whould be in the range
A.1 cm to 2 cm
B.2 cm to 3 cm
C.3 cm to 4 cm
D.4 cm to 5 cm
E.7 cm to 9.7 cm
The pulley in a belt drive acts as
A.Cylindrical pair
B.Sliding pair
C.Rolling pair
D.Turning pair
E.Spherical pair
A diathermic wall permits
A.Conduction heat flow only
B.Convective heat flow only
C.Radiation heat flow only
D.Heat exchange by all the three modes of heat transfer
E.No heat exchange
The maximum degree of curvature on metre gauge is
A.8?
B.10?
C.12?
D.16?
