Deck 3: Joints and Joining Techniques

Question 1

Which of the following are important parts of knuckle joint?

A)eye
B)pin
C)fork
D)each of the mentioned

Answer 1

each of the mentioned

Question 2

Calculate the diameter of pin from shear consideration with maximum shear stress allowed is 40NN/mm² and an axial tensile force of 50kN is acting on the rod.

A)39mm
B)44mm
C)49mm
D)52mm

Answer 2

39mm

Question 3

A knuckle joint can be used in valve mechanism of a reciprocating engine.

A)yes
B)no
C)yes but there are stress probles
D)no as it is very dangerous to use

Answer 3

yes

Question 4

Cotter joint is used when the members are subjected to which type of stresses?

A)axial tensile
B)axial compressive
C)axial tensile or compressive
D)none of the mentioned

Question 5

The principle of wedge action is used in cotter joint.

Question 6

Which of the following is not a part of cotter joint?

A)socket
B)spigot
C)cotter
D)collar

Question 7

Cold riveting holds the connected parts better than hot riveting.

Question 8

67 N/mm².; Spigot dia=65mm; thickness 0f collar=15mm

A)131mm
B)139mm
C)141mm
D)149mm

Question 9

Cotter joint can be used to connect two rods for torque transmission purpose.

Question 10

Thickness of plate is required more in welding than in riveting.

Question 11

The capacity of welded structures to damp vibrations is quite good.

Question 12

Themit consists of a finely divided mixture of iron oxide and copper.

Question 13

Rails in the field are generally welded by using

A)thermit welding
B)gas welding
C)electric arc welding
D)forge welding

Question 14

In gas welding which of the following is generally used?

A)oxygen-hydrogen
B)oxygen-acetylene
C)oxygen-hydrogen or oxygen-acetylene
D)none of the mentioned

Question 15

Filler material is used in electric resistance welding.

A)yes
B)no filler material used
C)depends on the type of welding
D)none of the listed

Question 16

Which type of welding is generally used in automobile sector?

A)electric arc welding
B)electric resistance welding
C)gas welding
D)forge welding

Question 17

Hard peening is

A)hammering the weld across the length while the joint is hot
B)hammering the weld along the length while the joint is hot
C)hammering the weld along the length while the joint is cold
D)hammering the weld across the length while the joint is cold

Question 18

A rivet is specified as a 20mm rivet. What does it mean?

A)none of the mentioned
B)shank dia 20mm
C)head dia 20mm
D)both head and shank dia 20mm

Question 19

In hand riveting die is a part of hammer.

Question 20

The amount by which the two rods to be joined are drawn together is called as?

A)draw
B)portray
C)lead
D)pitch

Question 21

Two steel rods connected by cotter joint are subjected to 50 kN load each. What is the minimum diameter required of the rods? (Given: Yielding Stress= 400N/mm² ; Factor of Safety=6)

A)31mm
B)35mm
C)36mm
D)40mm

Question 22

Among punching and drilling, which is cheaper?

A)punching
B)drilling
C)equally expensive
D)cannot be determined

Question 23

Riveting is not recommended for aluminium alloys.

Question 24

In joining steel plate and asbestos, welding is preferred over riveting.

Question 25

Quality checking of riveted joint is much expensive than that of welded joint.