Goa Board Class 12 Question Paper Mar 2019 Automobile

2019 III 20 1000 Seat No.

Time : 1½ Hours AUTOMOBILE
Subject Code

H 0 7 2
Total No. of Questions : 3 (Printed Pages : 6) Maximum Marks : 30

INSTRUCTIONS : (i) Answer each question on a fresh page.

(ii) Write the question number and sub-question number
clearly.

(iii) All questions are compulsory.

(iv) Figures to the right indicate full marks.

1. (A) Choose the correct answer from the options given below the
statement : 3

(1) More Engine Power is consumed in ............................. Valve
mechanism.

(a) OHV

(b) OHC

(c) HOC

(d) COV

(2) Valves in 4 Stroke I.C. Engines space ............................. Valves.

(a) Poppet

(b) Radial

(c) Axial

(d) Tappet

(3) EGR Vacuum modulator is located on the .............................

(a) Firewall

(b) Cylinder head

(c) Fuel common rail

(d) Intake hose

(4) Device used to force more air in the combustion chamber is
known as ............................. .

(a) Intercooler

(b) EGR

(c) Turbocharger

(d) Exhaust Valve

(5) In Automatic Transmission, the ............................. takes place of
a clutch.

(a) Axial Convertor

(b) Radial Convertor

(c) Thrust Convertor

(d) Torque Convertor

(6) Propeller shaft transmits power from ............................. to rear axle.

(a) Differential

(b) Engine

(c) Gear box

(d) Clutch

(B) Answer the following questions in one sentence each : 3

(1) Why manufacturer develops the service manual ?

(2) Mention any two contents of service manual.

(3) Name any two sensors used in MPFI Engines.

(C) Answer the following questions in two sentences each : 4

(1) State any four advantages of MPFI Engines.

(2) Mention any two functions of Differential.

2. (A) Choose the correct answer from the options given below the

statement : 3

(1) The most compact and more advantageous clutch is a

............................. clutch.

(a) Spring

(b) Diaphragm

(c) Multiplate

(d) Centrifugal

(2) Backlash is a gap between two meshing teeth of bevel pinion

and ............................. wheel.

(a) Crown

(b) Star

(c) Planet

(d) Sun

(3) Distance between center of front axle and center of rear axle is
called ............................. .

(a) King pin inclination

(b) Wheel track

(c) Wheel Base

(d) Length of car

(4) Tilting of front wheel outward at the top with reference to vertical
axis is called ............................. Camber.

(a) Negative

(b) Positive

(c) No

(d) Neutral

(5) The specific gravity of a battery when tested was between 1.260-
1.280, this indicates that the battery is ............................. .

(a) Fully charged

(b) Half charged

(c) Discharged

(d) About to run down

(6) Resistance is measured with the help of ............................. .

(a) Voltmeter

(b) Ammeter

(c) Ohmmeter

(d) Tachometer

(B) Answer the following questions in one sentence each : 3

(1) Name two types of piston rings used in a piston of automobile.

(2) In case of improper wheel base, how does it effect the vehicle ?

(3) Define wheel wobbling.

(C) Answer the following questions in two sentences each : 4

(1) Explain wheel alignment.

(2) List any four steps taken while inspecting an automotive battery.

3. (A) Answer the following questions in one sentence each : 3

(1) What is Caster angle ?

(2) State any two tools used to diagnose electrical problems in

automobiles.

(3) Identify the following Auto Electrical symbols given below :

(A) (B)

(B) Answer the following questions in two sentences each : 4

(1) List any four components of ignition system of an Automobile.

(2) Name any four types of cables used in auto electrical system.

(C) Answer the following question : 3

Identify the below given circuit diagram and name the parts marked

with alphabets.