Session 2: Angular Measuring Instruments
Unit 4: Measuring Equipment
Textual Question-Answers
Check Your Progress
A. Fill in the blanks
1. Instruments used for measuring the angle are called ………….. measuring instruments.
Ans: angular
2. A protractor is a device for measuring the angle between two……………. lines.
Ans: straight
3. The blade protractor has double graduations from 0–180°……………. directions permitting the direct in reading of angles.
Ans: in both
4. A bevel gauge is a (an) ……….. gauge for setting and ………….. angles.
Ans: adjustable, transferring
5. The universal bevel protractor is designed for …………. measuring and …………. of angles.
Ans: precision, layout
B. Multiple choice questions
1. Instruments used for measuring angles are called…………(a) angular measuring instruments
(b) gauge
(c) micrometer
(d) None of the above
Ans: (a) angular measuring instruments
2. Which device is used for measuring the angle between twointersecting lines?
(a) Protractor
(b) Scale
(c) Caliper
(d) Screw-gauge
Ans: (a) Protractor
3. Bevel or combination gauge is used to measure………………(a) setting and transferring angles
(b) depth
(c) length
(d) accurate angle
Ans: (a) setting and transferring angles
4. Which device is used for precision measuring and layout of angles?(a) Universal Protractor
(b) Combination gauge
(c) Caliper
(d) None of the above
Ans: (a) Universal Protractor
C. Answer the following questions
1. Explain the importance of angular measurement and measuringinstruments.
Ans: Angular measurement is important to ensure correct alignment, properfitting, and accurate assembly of components. Angular measuring instrumentshelp in maintaining precision, reducing errors, and improving the quality andsafety of automotive and mechanical parts.
2. What is the difference between a protractor and blade protractor?
Ans: A protractor is a simple instrument used to measure angles up to180°, whereas a blade protractor has a movable blade with double graduationsthat allow direct reading of angles in both directions.
3. Explain the procedure for using a bevel gauge.
Ans: To use a bevel gauge, loosen the locking nut, place the blade alongone surface, adjust it to match the required angle, tighten the locking nut, andthen transfer or check the angle on the workpiece.
4. How do we determine the least count of universal bevel protractor?
Ans: The least count of a universal bevel protractor is determined bydividing the value of one main scale division by the number of divisions onthe vernier scale.
