Keys MCQ

Test your knowledge with important Keys MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Keys MCQs at Bissoy

• Involute splines have stub teeth with a pressure angle of ___
  ক

  30

  খ

  45

  গ

  60

  ঘ

  Can’t be determined
• Splines are keys.
  ক

  True

  খ

  False
• Determine the length of kennedy key required to transmit 1200N-m and allowable shear in the key is 40N/mm². The diameter of shaft and width of key can be taken as 40mm and 10mm respectively.
  ক

  49mm

  খ

  36mm

  গ

  46mm

  ঘ

  53mm
• Woodruff key permits _____ movement b/w shaft and the hub.
  ক

  Axial

  খ

  Radial

  গ

  Eccentric

  ঘ

  None of the listed
• The main advantage of sunk key is that it is a _____ drive.
  ক

  Positive

  খ

  Negative

  গ

  Neutral

  ঘ

  None of the listed
• Saddle key is more suitable than sunk key for heavy duty applications.
  ক

  True

  খ

  False
• Hollow saddle key is superior to flat saddle key as far as power transmitting capability is concerned.
  ক

  True

  খ

  False
• A sunk key fits in the keyway of the _____ only.
  ক

  Hub

  খ

  Sleeve

  গ

  Both hub and sleeve

  ঘ

  Neither hub nor sleeve
• Maximum shear stress in transverse fillet weld of leg h and length l is
  ক

  P/hl

  খ

  1.21P/hl

  গ

  P/1.21hl

  ঘ

  None of the listed
• A force 2P is acting on the double transverse fillet weld. Leg of weld is h and length l. Determine the shear stress in a plane inclined at θ with horizontal.
  ক

  PSinθ(Sinθ+Cosθ)/hl

  খ

  P(Sinθ+Cosθ)/hl

  গ

  Pcosθ(Sinθ+Cosθ)/hl

  ঘ

  None of the listed
• A _________ integrity constraint requires that the values appearing in specified attributes of any tuple in the referencing relation also appear in specified attributes of at least one tuple in the referenced relation.
  ক

  Referential

  খ

  Referencing

  গ

  Specific

  ঘ

  Primary
• The ______ is the one in which the primary key of one relation is used as a normal attribute in another relation.
  ক

  Referential relation

  খ

  Referencing relation

  গ

  Referenced relation

  ঘ

  Referred relation
• The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as a primary key is called ______________
  ক

  Referential relation

  খ

  Referencing relation

  গ

  Referenced relation

  ঘ

  Referred relation
• An attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation.
  ক

  Candidate

  খ

  Primary

  গ

  Super

  ঘ

  Sub
• Which one of the following cannot be taken as a primary key?
  ক

  Id

  খ

  Register number

  গ

  Dept_id

  ঘ

  Street
• Which one of the following attribute can be taken as a primary key?
  ক

  Name

  খ

  Street

  গ

  Id

  ঘ

  Department
• A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique.
  ক

  Rows

  খ

  Key

  গ

  Attribute

  ঘ

  Fields
• The subset of a super key is a candidate key under what condition?
  ক

  No proper subset is a super key

  খ

  All subsets are super keys

  গ

  Subset is a super key

  ঘ

  Each subset is a super key
• Consider attributes ID, CITY and NAME. Which one of this can be considered as a super key?
  ক

  NAME

  খ

  ID

  গ

  CITY

  ঘ

  CITY, ID
• Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?
  ক

  Candidate key

  খ

  Sub key

  গ

  Super key

  ঘ

  Foreign key