The best lubricants for a machine working at high temperature & load is_________________?

Related Mcqs:

Addition of _______________ to steel does not help in improving its machinability ?

A. Sulphur B. Silicon C. Lead D. Phosphorous...

‘Cryogenics’ is concerned with the generation & use of low temperature in the range of____________________?

A. 0°K to 123°K B. 0°C to – 123°C C. 0°C to – 273°C D. 0°K to 273°K...

Lead is poured into the joint between two _______________ pipes ?

A. Mild steel B. Concrete C. Cast iron D. Asbestos cement...

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ?

A. Steel B. Glass C. Rubber D. Brass...

Pick out the wrong statement ?

A. A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’ B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces D. Tungsten steel and alnico are not hard magnetic materials...