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WorksheetsDAY 35 WORKSHEET ITI (Dimensioning )
Total questions: 15
Worksheet time: 8mins
In BIS recommended practice, the second dimension line must be placed —
8 mm from first
10 mm from first
12 mm from first
5 mm from first
Which method is MOST suitable for dimensioning holes arranged at equal pitch from a common datum?
Continuous / Chain
Parallel / Progressive
Unidirectional
Ordinate
Why are dimensions in mm generally not followed by “mm” after each value?
It saves time for drafter only
BIS prohibits the symbol
A general note at bottom makes unit clear
Readability is reduced otherwise
Which dimensioning system is BEST for large-sized drawings used in aerospace and automobile layouts?
Aligned
Unidirectional
Continuous
Parallel
Projection lines may be drawn obliquely only if —
They intersect the object edge at 90°
They remain parallel to each other
They carry arrowheads
They represent baseline measurements
“Parallel / Progressive dimensioning reduces tolerance buildup compared to chain dimensioning.”
True
False
“In aligned system, dimension text can be read only from the bottom of the sheet.”
True
False
Assertion (A): Leader lines must be inclined at least 30° to the horizontal. Reason (R): This prevents interference with extension lines and improves clarity of reading.
A true, R true, R explains A
A true, R true, but not explanation
A true, R false
A false, R true
The first dimension line must be placed (a) mm away from the object line.
For dimensions less than 1 mm, a (a) zero must be added before the decimal point (e.g., 0.75).
All drawing sheets bigger than A4 must be (a) to A4 size for filing and handling convenience.
The layout of a sheet includes placement of margin, title block, and (a) arrangement according to standard size.
The centering marks are provided at (a) sides of the drawing sheet for equal alignment.
MATCH THE FOLLOWING
A. Margin ------- 3. To locate modifications
B. Grid reference ----------- 4. Needed for trimming edges
C. Trimming marks ----------- 1. Provided for equal positioning
D. Centering mark ---------------- 2. For filing and binding
A → 2, B → 3, C → 4, D → 1
A → 3, B → 2, C → 4, D → 1
A → 2, B → 4, C → 3, D → 1
A → 2, B → 3, C → 1, D → 4
Match
A. Parallel dimensioning ----------- 4. Causes tolerance buildup
B. Chain dimensioning -------------- 1. All measured from common reference
C. Aligned system --------------- 2. Read only from bottom
D. Unidirectional system ---------- 3. Readable from bottom & right side
A → 4, B → 1, C → 3, D → 2
A → 1, B → 4, C → 3, D → 2
A → 1, B → 3, C → 4, D → 2
A → 4, B → 1, C → 2, D → 3
