Question 41 : Euler's formula for a mild steel column is not valid if the slenderness ratio is
1. 90
2. 60
3. 100
4. 120
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Question 42 : 18/8 steel contains
1. 18% nickel and 8% chromium
2. 18% chromium and 8% nickel
3. 18% nickel and 8% vanadium
4. 18% vanadium and 8% nickel
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Question 43 : For hardening alloy steels and high speed steels, they are heated to
1. 500 to 600°C
2. 700 to 900°C
3. 1100 to 1300°C
4. 1300 to 1500°C
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Question 44 : The metal suitable for bearings subjected to heavy loads is
1. silicon bronze
2. phosphor bronze
3. white metal
4. monel metal
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Question 45 : An universal coupling is used to connect two shafts
1. which are perfectly aligned
2. which are not in exact alignment
3. have lateral misalignment
4. whose axes intersect at a small angle
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Question 46 : A localised compressive stress at the area of contact between two members is known as
1. tensile stress
2. bending stress
3. shear stress
4. bearing stress
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Question 47 : The velocity factor for carefully cut gears operating at velocities upto __________ is equal to 4.5/4.5 + v.
1. 15 m/s
2. 20 m/s
3. 10 m/s
4. 12.5 m/s
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Question 48 : When carbon in the cast iron is principally in the form of graphite, the cast iron will be of
1. grey colour
2. yellow colour
3. brown colour
4. white colour
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Question 49 : The rivet head used for boiler plate riveting is usually
1. conical head
2. pan head
3. counter sunk head
4. snap head
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Question 50 : The lower deviation is the algebraic difference between the
1. maximum limit and the basic size
2. actual size and the corresponding basic size
3. none of the above
4. minimum limit and the basic size
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