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Question 1

Which of the following is the major
alloying element in Invar?
A. Cooper C. Nickel
B. Vanadium D. Aluminum

Answer 1

C

Question 2

Which of the following is available in five
slightly different nominal composition for application which
require high strength, good fabricating and fusing qualities,
immunity to rust, free machining and a corrosion resistance
equivalent to copper?
A. Everdur C. Dynever
B. Silicon D. Titanium

Answer 2

A

Question 3

Which of the following is one of the best
methods for increasing a spring’s fatigue life?
1. Stress relieving C. Tempering
2. Shot peening D. Hardening

Answer 3

B

Question 4

Spring back metal forming depends on
_______.
xvii
A. Applied load C. Strain rate
B. Modulus of elasticity D. Modulus of rigidity

Answer 4

B

Question 5

) When more than one spring or resisting
member share the load, the relative stiffness is the:
A. Stiffness C. Normal stress
B. Rigidity D. Modulus of elasticity

Answer 5

B

Question 6

Steel springs are made of high carbon
steel heat treated and/or cold worked to a high elastic limit
to get good elastic deflection; in general, the carbon content
is at:
A. 0.40% or more C. 0.5% or more
B. 0.45% or more D. 0.66% or more

Answer 6

C

Question 7

It is similar to helical springs made for
retracting as opposed to being compressed.
A. Compression spring C. Belleville spring
B. Conical spring D. Extension spring

Answer 7

D

Question 8

What is the metal composed of 78%
Nickel, 14% Chromium and 7% Iron?
A. Monel C. Inconel
B. Elgiloy D. None of these

Answer 8

C

Question 9

A super-alloy composed of 39-41%
cobalt, 19-21% chromium, 14-16% nickel, 11.3-20.5% iron,
6-8% molybdenum, 1.5-2.5% manganese and 0.15%
maximum carbon used to make springs that are corrosion
resistant and exhibit high strength, ductility, and good
fatigue life.
A. Ni-Span C C. Elgiloy
B. Inconel D. None of these

Answer 9

C

Question 10

) If the length of the helical spring is cut
into half, what will happen to its stiffness?
A. Double C. One-half
B. One-fourth D. Remains the same

Answer 10

A

Question 11

Which of the following is associated
with compression?
A. Wire drawing C. Tension
B. Extrusion D. Protrusion

Answer 11

B

Question 12

The process that is used to improve
fatigue strength and impart residual compressive stress.
A. Cold working C. Tempering
B. Shot peening D. Annealing

Answer 12

B

Question 13

Cracks in helical spring used in railway
carriages usually start on the inner side of the coil because
of the fact that it:
A. Is more stretched than the outer side during the
manufacturing process
B. Is subjected to a higher stress than the outer side
C. Is subjected to a higher cyclic loading than the outer
side
D. Has lower curvature than the outer side

Answer 13

B

Question 14

Leaf spring used in the transport
industry is usually in the grade of SAE _____.
A. 1030 C. 1060
B. 1040 D. 1085

Answer 14

D

Question 15

Peening is a cold working process in steel
materials that tends to _______ its properties.
A. Make it more ductile C. harden
B. Make it more malleable D. oxidize

Answer 15

C

Question 16

) An elastic body whose primary function
is to deflect under load.
A. Clutch C. Brake
B. Stopper D. Spring

Answer 16

D

Question 17

The ability to resist deformation under
stress.
A. Plasticity C. Stiffness
B. Toughness D. All of the above

Answer 17

C

Question 18

) An elastic body whose primary function is to
deflect under load.
A. Brake C. Spring
B. Clutch D. Stopper

Answer 18

C

Question 19

Steel springs are made of high carbon
steel heat treated and/or cold worked to a high elastic limit
to get good elastic deflection. In general, the carbon content
is at:
A. 0.40% or more C. 0.65% or more
B. 0.5% or more D. 0.66% or more

Answer 19

B

Question 20

Steel spring material is usually hardened
to 400 to 500 BHN and the carbon content is in the range
of:
A. 0.45 to 0.48 % C. 0.96 to 0.97
B. 0.50 to 0.90 % D. None of these

Answer 20

B

Question 21

In majority of machine members, the
damping capacity of the material should be:
A. Anything C. Low
B. High D. Zero

Answer 21

B

Question 22

The following steels are used for leaf springs applications
EXCEPTxxiii:
A. SAE 1095 C. SAE 6150
B. SAE 3130 D. SAE 9260

Answer 22

B

Question 23

It is an alloy steel made of low carbon and phosphorus
content, the strength and ductility is a great choice for
automotive applications, including machined parts,
fasteners, and plated components.
A. SAE 1030 C. SAE 1117
B. SAE 1045 D. SAE 4340

Answer 23

C

Question 24

In the calculation of induced shear stress in helical springs,
the Wahl’s correction factor is used to take care of:
A. Combined effect of bending stress and curvature of the
wire.
B. Combined effect of torsional shear stress and
transverse shear stress in the wire.
C. Combined effect of transverse shear stress and bending
stresses in the wire
D. Combined effect of transverse shear stress and
curvature of the wire

Answer 24

D

Question 25

The fatigue life of stranded-wire springs has been increased as much as ____ times over the life of conventional springs. A. Two C. Four B. Three D. Five

Answer 25

C

Question 26

In a spring design, spring index of 7 through 9 is best 4 through 7 and 9 through 16 are often used but spring index of ______ should be avoided due to difficulties in making. A. 4 C. less than 5 B. 5 D. less than 4

Answer 26

C

Question 27

In laminated spring (leaf spring), the strips are provided in different lengths for _______. A. economy C. reduction in weight B. equal stress distribution D. improve appearance

Answer 27

B

Question 28

The capacity or tendency of sheet metal tries to revert back into its straight form once it is bentxxv . A. Plasticity C. Stiffness B. Toughness D. Springback

Answer 28

D

Question 29

What are the best proportioned coil spring indices?xxvi A. 3 to 5 C. 7 to 9 B. 5 to 7 D. 9 to 15

Answer 29

C

Question 30

It is a type of coil spring where the helical coil is wrapped into a circle forming an annular ring. How do you call this spring? A. Volute spring C. Garter spring B. Motor spring D. Belleville spring

Answer 30

C

Question 31

This alloy is used for springs, a non-magnetic, corrosion resistant material suitable for sub-zero temperatures and temperatures up to about 750 °F composed of nickel, iron, chromium, and cobaltxxvii . A. Elgiloy C. Dynavar B. Inconel D. Ni-Spac C

Answer 31

C

Question 32

Which of the following function/s can a helical spring perform? A. Absorb shock C. Measure force B. Store energy D. All of these

Answer 32

D

Question 33

What is the name of the longest leaf in a leaf spring? A. Middle leaf C. Master leaf B. Center leaf D. None of these

Answer 33

C

Question 34

What is the length of the spring if it is compressed completely? A. Solid length C. Compressed length B. Free length D. None of these

Answer 34

A

Question 35

What is the type of spring used in door hinges? A. Helical extension spring C. Semielliptical spring B. Helical torsion spring D. Spiral spring

Answer 35

B

Question 36

The pitch of helical spring is defined as axial distance in its __________ state of the coil. A. compressed C. uncompressed B. axial D. biaxial

Answer 36

C

Question 37

It is the type of spring used to achieve any linear or nonlinear load-deflection characteristics. A. Spiral spring C. Coil spring B. Torsion spring D. Belleville spring

Answer 37

D

Question 38

78. When the helical extension spring is subjected to axial tensile force, what is the type of stress induced in the spring? A. Tensile stress C. Compressive stress B. Torsional shear stress D. Bending stress

Answer 38

D

Question 39

What is the formula to find the solid length for helical compression springs having square and ground ends? A. (n + 2)d C. (n + 3)d B. (n + 1)d D. nd

Answer 39

A

Question 40

In a closed helical spring subjected to an axial load, other quantities remaining the same, if the wire diameter is doubled and mean radius of the coil is also doubled, then stiffness of spring when compared to original one will be: A. Twice C. eightfold B. Fourfold D. twelvefold

Answer 40

A

Question 41

Which of the following devices can be used for measuring torque? A. Bellows C. Flat spiral spring B. Diaphragm D. Helical spring

Answer 41

C