Lead pencil contains____________________?

Related Mcqs:

A reduction in thermal resistance during heat transfer does not occur in the___________________?

A. Convection heat transfer by stirring the fluid and cleaning the heating surface B. Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity C. Radiation heat transfer by increasing the temperature and reducing the emissivity D. None of these...

The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?

A. 159 B. 1837 C. 2537 D. 10000...

Oxygen cylinders used for autogenous (cutting/welding) purposes are ___________________?

A. Seamless & made of steel B. Heat treated before use C. Made by sand casting D. Welded steel cylinders...

Unit of surface tension in S.I. unit is_________________?

A. Watt/m B. Joule/m2 C. Newton/m2 D. Joule/m...

Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?

A. Wood’s metal B. Babbitt metal C. Monel metal D. Duralumin...