The radiation pyrometers work on the principle of ______
 

a. Newton's law

b. Stefan Boltzmann's law

c. Zeroth law

d. None of the above

 Which of the following statements is/are false for machine tools?

1. Pillar drilling machine drills holes up to 75 mm
2. Regulating wheel is a component of surface grinding machine
3. Sensitive drilling machine is also known as bench drilling machine
4. The chuck of an internal grinding machine placed in tailstock is driven by an electric motor
 

a. Only 1

b. 2 and 4

c. 1 and 3

d. All of the above

 On drilling machine, which process is known as reaming?

 

a. Enlargement of existing hole

b. Hole made by removal of metal along the hole circumference

c. Smoothly finishing and accurately sizing a drilled hole

d. All of the above

The process of chamfering the entrance of a drilled hole is known as_____

 

a. counter-boring

b. counter-sinking

c. counter-fillet

d. trepanning

Which of the following operations is/are performed on a lathe machine?

 

a. Spot-facing

b. Parting

c. Reaming

d. All of the above

Which process squeezes metals into peaks and troughs with plastic deformation?

 

a. Grooving

b. Knurling

c. Reaming

d. None of the abov

   At forging temperature when a compressive force is applied on the material, it deforms
 

a. elastically in the direction of least resistance

b. elastically in the direction of maximum resistance

c. plastically in the direction of least resistance

d. plastically in the direction of maximum resistance

 The process of joining similar or dissimilar materials by heating them below 450^o C using non-ferrous filler material is called as ______

 

a. Brazing

b. Soldering

c. Welding

d. All of the above

 Casting replica used to make the cavity is called as

 

a. Mould

b. Pattern

c. Cope

d. None of the above

What is meant by drag in casting process?

 

a. Upper part of casting flask

b. Molten metal

c. Lower part of casting flask

d. Upper and lower part of casting flask

 What are the number of sliding and turning pairs in a slider crank mechanism?

 

a. 1 sliding pair and 3 turning pairs

b. 2 sliding pairs and 2 turning pairs

c. 3 sliding pairs and 1 turning pair

d. None of the above