Question 1

which of the following track is electrified

Accepted Answer

A) delhi-bombay 
B) delhi-madras 
C) delhi-howrah 
D) delhi-ahmedabad

Question 2

The basic electrical requirement in arc welding is that there should be

Accepted Answer

A) coated electrodes 
B) high open-circuit voltage 
C) no arc blow 
D) d.c. power supply.

Question 3

For 600 V D.C. line for tramcars, brack is connected to

Accepted Answer

A) positive of the supply 
B) negative of the supply 
C) mid voltage of 300 v 
D) none of the above

Question 4

A.C. welding machine cannot be used for welding

Accepted Answer

A) mig 
B) atomic hydrogen 
C) resistance 
D) submerged arc.

Question 5

Fuse is a piece of wire of a materi

Accepted Answer

A) high melting point 
B) low melting point 
C) moderate melting point 
D) none of the above

Exam 3: Thermal Conductivity, Welding, and Locomotives

which of the following track is electrified