MECHANICAL TECHNICAL QUIZ

The friction experienced by a body, when in motion, is known as

• Rolling friction

• Dynamic friction

• Limiting friction

• Static friction

The unit of force in S.I. system of units is

 

•  

  Dyne

•  

  Kilogram

• Newton

• Watt

The mechanical efficiency of an impulse turbine is

• Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine

• Ratio of the actual work available at the turbine to the energy imparted to the wheel

• Ratio of the Work done on the wheel to the energy of the jet

• None of the above

The instrument used to measure external and internal diameter of shafts, thickness of parts and depth of holes, is

• Outside micrometer

• Inside micrometer

• Depth gauge micrometer

• Vernier caliper

The casting method adopted for ornaments and toys of non-ferrous alloys, is

• Permanent mould casting

• Slush casting

• Die casting

• Centrifugal casting

For the same compression ratio, the efficiency of dual combustion cycle is

• Greater than Diesel cycle and less than Otto cycle

• Less than Diesel cycle and greater than Otto cycle

• Greater than Diesel cycle

• Less than Diesel cycle.

The atomic mass of sulphur is

• 12

• 14

• 16

• 32

A cycle consisting of two isothermal and two isentropic processes, is known as

 

• Carnot cycle

• Stirling cycle

• Ericsson cycle

• Joule cycle

The materials used for cylinder block are

• Cast iron and steel

• Cast iron and aluminium alloy

• Steel and aluminium alloy

• Brass and steel

Which of the following is not an automobile ?

• Motor cycle

• Passenger car

• Aeroplane

• Truck