- Grey cast iron
- White cast iron
- Mottled cast iron
- Toughed cast iron
1 Answers
Call
Talk Doctor Online in Bissoy App
Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving end. What is this system of sending messages called?
Answer: Option 2 Let'
1 Answers 1 views
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of?
Answer: Option 4 Let'
1 Answers 1 views
The toughness of a material _________ when it is heated?
Answer: Option 3 Let'
1 Answers 1 views
The toughness of a material __________ when it is heated.?
Answer: Option 2 The toughness of a material decrease when it is heated.
1 Answers 1 views
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.?
Answer: Option 2 When filing or machining cast iron makes our hands black, then it shows that free graphite is present in cast iron.
1 Answers 1 views
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by?
Answer: Option 1 Conduction transfers heat via direct molecular collision. An area of greater kinetic energy will transfer thermal energy to an area with lower kinetic energy. Higher-speed particles will...
1 Answers 1 views
Heat of transition is the heat evolved or absorbed, when a substance is converted from?
Answer: Option 4 Let'
1 Answers 1 views
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)?
Answer: Option 1 Fourier's law of heat conduction is k. A. (dT/dx) where Q = Amount of heat flow through the body in unit time, A = Surface area of heat...
1 Answers 1 views
The heated parts of an electrical machine dissipate heat into their surroundings by which of the followingmodes of heat dissipation ?
Answer: Option 4 Let'
1 Answers 1 views
Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?
Answer: Option 2 Let'
1 Answers 1 views