Workshop Technology - Study Mode

[#106] The shrinkage allowance for cast iron pattern is
Correct Answer

(A) 10 mm/m

Explanation

Solution: The shrinkage allowance for cast iron pattern is 10 mm/m

[#107] The advantage of thermit welding is that
Correct Answer

(D) All of the above

Explanation

Solution: Advantages of thermit welding is listed below: • The weld formed has high mechanical strength. • Excellent corrosion resistance as compared with other forms of weld. • It is highly stable to repeated short circuit pulses. • The electrical resistance remains unchanged over lifetime of the installation. • All parts of the weld section are molten at the same time. • Weld cools almost uniformly. • Results in a minimum problem with internal residual stresses.

[#108] When the dimension is expressed as $$20_{ - 0.025}^{ + 0.035},$$ xa0then the basic size is
Correct Answer

(A) 20 mm

Explanation

Solution: When the dimension is expressed as $$20_{ - 0.025}^{ + 0.035},$$ xa0then the basic size is 20 mm.

[#109] The upsetting is a process of
Correct Answer

(A) Increasing the cross-section of a bar

Explanation

Solution: Upsetting of metals is a deformation process in which a billet is compressed between two dies in a press or a hammer. This operation reduces the height of a part while increasing its diameter. The process is mostly used as an intermediate step in multiple step forging operations

[#110] A pattern maker's shrinkage rule considers
Correct Answer

(B) Only shrinkage allowance

Explanation

Solution: A pattern maker's shrinkage rule considers Only shrinkage allowance