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MCQs

Total Questions : 936 | Page 40 of 94 pages
Question 391.

 
A sand employed on the faces of the pattern before moulding, is called


  1.    green sand
  2.    dry sand
  3.    loam sand
  4.    parting sand
 Discuss Question
Answer: Option D. -> parting sand


Question 392.

 
Spot welding is used for welding


  1.    lap joints in plates having 0.025 mm to 1.25 mm thickness
  2.    lap joints in plates having thickness above 3 mm
  3.    butt joints in plates having 0.025 mm to 1.25 mm thickness
  4.    butt joints in plates having thickness above 3 mm
 Discuss Question
Answer: Option A. -> lap joints in plates having 0.025 mm to 1.25 mm thickness


Question 393.


Thermit welding is often used in


  1.    replacing broken gear teeth
  2.    repairing broken shears
  3.    joining rails, truck frames and locomotive frames etc.
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above


Question 394.

 
Which of the following statement is wrong?


  1.    The angular clearance on dies varies from` 0.5^circ` to` 1^circ`.
  2.    In drawing operation, the metal flows due to plasticity.
  3.    In press operation, the size of the pierced hole is independent of the size of punch.
  4.    none of the above
 Discuss Question
Answer: Option D. -> none of the above


Question 395.

The directional solidification in casting can be improved by using


  1.    chills and chaplets
  2.    chills and padding
  3.    chaplets and padding
  4.    chills, chaplets and padding
 Discuss Question
Answer: Option B. -> chills and padding


Question 396.

 
The process extensively used for making bolts and nuts is


  1.    hot piercing
  2.    extrusion
  3.    cold peening
  4.    cold heading
 Discuss Question
Answer: Option D. -> cold heading


Question 397.

 
Metal patterns require __________ draft allowance than wooden patterns.


  1.    more
  2.    less
 Discuss Question
Answer: Option B. -> less


Question 398.

 
A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?


  1.    The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction.
  2.    The upper and bottom rolls rotate in the same direction whereas the middle roll rotate in opposite direction.
  3.    The bottom and middle roll rotate in the same direction.
  4.    any one of the above
 Discuss Question
Answer: Option B. -> The upper and bottom rolls rotate in the same direction whereas the middle roll rotate in opposite direction.


Question 399.

The oxy-acetylene gas used in gas welding produce a flame temperature of


  1.    `1800^circ`C
  2.    `2100^circ`C
  3.    `2400^circ`C
  4.    `3200^circ`C
 Discuss Question
Answer: Option D. -> `3200^circ`C


Question 400.

.Loam sand is a mixture of


  1.    30% sand and 70% clay
  2.    50% sand and 50% clay
  3.    70% sand and 30% clay
  4.    90% sand and 10% clay
 Discuss Question
Answer: Option B. -> 50% sand and 50% clay


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