MCQ on Mechanical Engineering

MCQ on Mechanical Engineering

1-In standard marking of a grinding wheel ’51-A46H5VS’, Letter ‘H’ represents

(A) Structure

(B) Type of bond

(C) Grain size

(D) Grade

 

2-To check and set the spark plug gaps and tapper clearance in an engine:

(A) Feeler gauge

(B) Snap gauge

(C) Plug gauge

(D) Inside caliper

 

3-The depth of the tooth space of a gear below the pitch circle is called

(A) Addendum

(B) Dedendum

(C) Centre distance

(D) Crest

 

4-Which one of the following abrasives is used for honing non-ferrous metals?

(A) Aluminium oxide

(B) Silicon carbide

(C) Diamond

(D) Boron carbide

 

5-The general ratio of soluble oil and water used as coolant is:

(A) 10:1

(B) 1:10

(C) 1:20

(D) 20:1

 

6-While machining cast iron, the coolant used should be:

(A) Dry air

(B) Kerosene

(C) Soluble oil

(D) Soft water

 

7-Which one of the following reason that water is preferred as coolant on machine tools?

(A) It decreases cutting action of the tool

(B) Danger of corrosion

(C) It has sufficient cooling effect

(D) Due to high cooling effect the cutting edges of tool break off

 

8-Which one the following is used to guide the tool and hold the job in mass production?

(A) Gauge

(B) Housing

(C) Jig

(D) Fixture

 

9-Main alloying element in HSS is:

(A) Tungsten

(B) Chromium

(C) Vanadium

(D) Nickel

 

10-‘Cyaniding’ and ‘Nitriding’ are two methods of:

(A) Hardening

(B) Case hardening

(C) Tempering

(D) Normalizing

 

ANSWERS:

1-(D), 2-(A), 3-(B), 4-(A), 5-(C), 6-(C), 7-(B), 8-(C), 9-(A), 10-(B)